Good pistons for vortec heads. I have two questions & I'd appreciate your input: 1.
- Good pistons for vortec heads after being reading several forums and articles, and being told NOT to use the common stock full dish pistons with vortec heads, so I have been looking for alternatives. 6:1, 062 head 355 and I think a slightly shorter duration and single pattern cam on Milling the Vortec head I'm a big fan of the Vortec head but IMO, it's not worth the trouble and expense on a small bore engine. Since you have the Vortec cylinder heads, I'm curious as to which profile you went with? . A vortec style intake manifold. I am running a 217/225 108 LSA roller in a similar 9. 5 to 1. SOLD 69 El Camino parts car. 50 280/280 480"/480" runing down the 8th @ around 7. Looks real good for a heavy car and This recomendation was based on my guess of 10 to 1 compression with the 64 CC vortec heads. The $679 is for heads that have LT4 valve springs, posi seals and machine work. Good luck! Also, Ricardo mentions Marine version parts. Regardless of what they were supposed to be good for the Vortec does not accept lifts over . The 11:1 dome piston solution seems viable, I know this is "old school", but these pistons help make better than 1hp per cubic inch in the 302/327 motors; a good indicator of VE. The dished Piston 305's are great for supercharging projects. Don't mess it up by trying to make too 3. I would like to know the best recommendation for a cam profile, pistons, rings and heads. 015. Re: Can you use domed pistons with Vortec heads? 09-06-03 06:45 AM - Post# 295041 In response to Quench measurement has nothing to do with the heads really. Starting with what you already have to work with a little pocket porting can help those 441's and a good quality cast flat top piston will put compression around 8. 020-inch down from the deck, which is a common situation with ‘70s engines. The 350 engine is an internal combustion engine and naturally has pistons that require a camshaft kit. There is a way you can run those pistons with vortec heads, however it requires careful tuning. Will not be racing the car anytime soon. 5 Valves Intake Edelbrock Performer #2116 Carburetor - Edelbrock Performer #1406 If you have that number on your current pistons and they are in good shape and bores Good Luck Jeff . Speed pro flat-tops, and vortec heads will put you at exactly 9. 035 in the whole and a . The car will be automatic, not sure on what converter I'm running. Idled good and cruises good but when you stomp it it would ping like rocks in a can. Are the AC Delco plugs with . 5" valves? If so, 64cc plus dished pistons gives an actual compression ratio about 8. e thickness suggestions? Might be a good candidate for the Fel Pro 1094's if the block is perfect. Heads will be box stock (no porting) 906 vortecs. I have two questions & I'd appreciate your input: 1. 450″ on a Mexican 062. Keeps the heat out of the carb and use a Holley or something else unless your familiar with edelbrock. As the name implies, steamholes vent coolant vapor from the block. Wow. The Stock heads are a little over $500 a pair. I finally bought a set of Vortec heads to put on the L48 in my 78. There is better hm really, ok then about those 305 heads what size valve is n those, reason why im askn is bc i have so big port 305 heads that we ran on a 355 pushn 13:1 comp with a 230@ . 5:1 to 9. 480 intake and . even on engines with vortec heads even on marine motors. I believe at 1. piston deck height (distance from piston crown to block deck with piston at top dead center) and figure cc's the same way as you figure displacement of a cylinder, see #1 above. Use the shim head gasket instead of block decking. The 12558060 heads are advertised to be good for 0. a . A 25cc dome piston will give you around 9. tend to like tight 106-108 LSA cams for street fun torque. 035 to . 25 or so to 1 CR. Hell just knowing wht he has said I'm assuming its about 9. Im looking for some concrete evidence of people running domed pistons with vortec heads. I'm not saying for sure that im gonna put on these vortec heads, but its an option down the road if they are better than the 781s that i have. The AFR Enforcer heads ($1300 now) AFR Enforcer or the Blueprint Engines heads H8002K ($1600 now), this Comp hydraulic roller Comp Xtreme Energy or this Comp Xtreme Fuel Injected cam, either with 1. Getting the cr correct is critical on small cid N/A performance builds. Hi, everyone. They are 062 casting codes and the seller says they have stage 2 springs good for . 02 / 1. 60's in the summer on 93 octane. Using flat tops won't give you enough the reason am doing a so cheap build is to put to shame an 89 mustang 5. 475" lift, but be sure to check the clearance between the seal and retainer if your cam comes anywhere near that much lift. but after reading one of the topics I discovered that they were the 1. There's lots of options available for manifolds etc. Does your 454 have flat tops like the L2377 piston or a oem piston with a slight dish top. I went with a Lunati cam with 204/214 duration at . 040" and end up with around a 58-60cc chamber. 5 valves-ported and polished weiand 7504 intake topped with a Holley 700 carb. there is no doubt that vortecs are great heads but then you have to buy rockers an intake push rods etc . They are very good at investigating and responding to inquiries. 94 intake to fit the small 283/307 bore, you should still be able to match - 6 cc piston - 0. edelbrock heads edelbrock heads are much cheaper than 1700 dollars. Compression came out at 9 to 1. This Speed-Pro Hypereutetic coated H890CP looks like it has the best mirror for the Vortec heads but it’s a non-vortec specific piston (heavier overall weight, thicker rings, different skirt) and it also has a 1. Vortec design combustion chamber. The LG4 from a Caprice and the L69 from a Monte were flat top 4 valve relief pistons. Read the tech article on a Budget Vortec Head Cam 355 Build, brought to you by the experts at Chevy High Performance Magazine. 3 but constantly running 14. 480 lift with the stock heads. (. Even with the 1. 698-1. 451" 109ºLSA roller cam, but this time GMPP(now CPP) decided to use the 1. 50's they rev very well. 560 compression height and have the heads whacked about . Make sure you use a phenolic carb spacer. 0/1 with flat top pistons but has far superior exhaust ports. I can run any non roller cam and more compretion with flat top pistons. 8:1 compression Vortec heads work well with dished pistons but remember about the problems of using over about . Vortec Cylinder Heads #12558062 (Vortec) 1. 041 thickness head gasket with 4. 00/1. In most cases a piston is . Flat top piston 355 . "Usually" doesnt cut it. They also sell a complete kit which has the modified Vortecs, intake manifold (Edelbrock They are factory flat top pistons, with those vortec heads, also not sure on what head gasket I plan to run yet. 19:1 static compression ratio with flat-top 5cc pistons and a 0. 060 over-400 rods shot peened and polished-KB 3. how money you can spend without your wife or girl freind knowing about!! Your Vortec head has 64cc chambers. If the motor is reasonable I would grab it and put a mild cam in it. Runs great but the #1 cylinder plug fouled out after about 1000 miles. 487 exhaust lift. I've put LS1 valve springs on them to replace the stock springs. 00 gears in a gutted '84 Vette, it ran 11. Just stay away from Speed Pro H345's. 550” lift with no machining. 8 to 1 ran great on pump gas and pulled off a 12. 030 drops it to 10. Here is the list of parts, and what do you think of this cam, and what peak power and rpm would you think? Performer rpm air How do Vortec heads compare to the double hump 186's or the 041's (with 194 intake) that I have now. 5 compression which then calls of a total CC volume of 75. Big block vortec heads aren't different like vortec small block heads and intakes will interchange. With a stock piston, we’ll assume the piston is 0. 94 / 1. They flow pretty good as cast for the stock valve size. 3:1 compression KB -12cc dish pistons (or -18cc pistons for 9. The piston to deck height is dritical, the piston volume can be looked up online (measured vol not advertised btw), the heads should be measured but can be assumed at 64cc's. 3. For an example an engine with 12cc dished pistons with 76cc heads will have 9. A 400 will eat a good sized cam and idle nice . You need to check retainer clearance if you use cast iron vortec heads,not required with the bump heads. Heads: 1977 781's Open Chamber ~118cc resulting in 9,5-10:1 CR with stock pistons (assuming 0. The 1st thing you'll need to do is measure the piston to deck hgt @ TDC. A more street friendly combo would have been to use an 18-cc D-deck dish piston with a shim head gasket for a tight quench, your static CR would be right at 10:1. but they max out at with a 5. 65:1 The heads work pretty good for the street, both of these set-up's had ported heads and ran pump gas. So if Aluminum heads let you get away with more compression than iron because the aluminum moves heat about 3 times as fast as iron so that tends to clip off the temperature spikes that initiate the detonation/preignition sequence. - I was wondering what are the best low end power heads out there 800-4500 RPM with power around 2000-4000 aria. Lots of room to grow with porting and larger valves. 451" 109ºLSA, with 1. Basic rebuild, keeping the stock pistons, crank, rods. Use a 400 head gasket as a guide and a 1/8" bit. Chevy Vortec Aluminum 350 Cylinder Heads 64cc 2. 0 A good head porter will ask for your cam card and build your heads to the cam. 020, use a thin head gasket, and a flat top piston with a 1. With a common, four-eyebrow flat top piston and a . What is a good source? While I will not suggest part numbers to you, I will suggest that you use a Vortec style cylinder head WITH the correct piston profile that MIRRORS the Vortec quench surface. head gasket volume in cc's (usually given by the manufacturer. 7 to 1 with a standard . L31 Vortec SBC, We were doing the top end only but we decided Speed Pro #H631CP is also a good piston for your build if the Mahle's your looking at don't come thru. Types of GM Vortec Heads. 60 over (they didn't tell me before they did it, said it was fine) flat top pistons, and stock Vortec heads (new) from GM Performance. ” Lunati solid 292/301, . These are inexpensive These factors should help you figure out the best piston for your application. Assuming that is would be possible to cut the L31 decks for 60 cc's (about 0. The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. 045" deck clearance. if you get slightly above the engine will see that flow Vortec heads dont need as much timing as some earlier heads, but you may end up running premium with a 9. That combination ran 12. Tech Inspector I read some of your previous posts and you saved me a great deal of disappointment. 450 lift you will need to have the valve guides clearanced for the additional lift. And lastly about 1. . The ports are taller on the Vortec heads and the bolt pattern between the intake and the head is different. 400 with a port stall at 0. Which is exactly where you Summit shows the KB135 piston with a quench surface that mirrors a "D" shaped cylinder head quench surface, whereas Speedway shows the KB135 piston with a quench Stock spec's will be the DITH piston of right at . Grab a set from Ebay for $400, along with a used Edelbrock intake for $80, bolt them on and have fun. 050 and low . 124 Bore TRW / Sealed Power / Federal Mogul** PISTONS FOR A CHEVY**L-78***396 1st Design Closed Chamber Head But if you will only use your car for cruising, you can't beat the price and performance of Vortec heads. But the bigger the relieves go on my pistons, the less my CR will be, and I need to know about it, so I can use the right headgasket, or find out if I need to mill the block to keep good compression. Hi Dave, I put together something close to what you are doing a year ago. I want a cam with a little lope but that will run good, hotrodding around town. 50 valves. 0:1. Even if I put a very mild cam in that 406 engine with an LCA of 112° or higher the engine would still scream with those heads. 470 without cutting the guides down. deck height of block compared to piston height. Normally that is too much for a cast iron head on pump gas, at least in my opinion it is. 050, . Since it was rebuilt, shorter rebuilders pistons may have been used. I have flat top pistons and wanted to do a 11:1 compression motor. Aluminum heads with the same chamber size will run about 9. 5. You can use heads off a later vortec 454. 5 to 1 compression 830 QF carb 3500 stall, 3. 5cc piston works good with 72cc chamber on 350's. it would get 28mpg on good days and averaged 26. 625/. Heres the route I'm going- Bored . The valve guides have not been machined down. Has anyone tried the vortec heads on a 283 or a 265 If you use the 350 vortec heads the compression ratio will still come in on the low side, I calculated it, using the common . They have a 100cc chamber which will maintain your compression ratio. 2. for induction, an Edelbrock Performer Vortec with a q jet on it will do nicely. 08 rear. Vortec heads cut guides and springs good to . This would lead me to believe that a standard domed piston might not work. If it were me and I really wanted a domed piston with the votec style head, I would check and see what I saw this while researching Vortec heads and decided I would share with the group. Somewhere on the net there's a picture comparing the two conbustion chambers. Later tbi and vortec heads use a different bolt pattern for the intake. The Vortec (L29) heads have a bigass ski-jump in the port, just like the crappy TBI small-block "swirl port" heads. whether you’re replacing an old camshaft or rebuilding a 350 engine with Vortec heads on your own. Sounds good to me. It is an eagle assembly with speed pro -12cc dish pistons and I plan on 64 cc vortec heads. I updated my 1972 307ci small block engine in my 68 Chevelle with new Vortec heads, medium cam,Duration:262/270,RPM range=1300-5600. Im needing to buy some head gaskets for my 350 that I had rebuilt. A factory vortec long block has virtually zero quench due to having a full round dish piston, yet still have typical vortec head timing requirements. Tuner Guru Posts: 3495 Joined: Sun Apr 01, 2007 9:26 am BBC vortecs do flow pretty good but they are also a small chamber and will not work with dome pistons. try to keep the CR to about 9 - 9. The 441 castings flow way better and about equal to the later heads but 5400-5800rpm and they are used up. 5-10. Block is a '69 vintage, bored . My stock manifolds and risers are in good shape but they are almost 20 years old. 7L Vortec pistons? I'm picking up a used 5. The wife would not get If your looking for mostly a stock camshaft the WG-1139K would be good,, This cam is 284/284 seat duration 218/218 duration @ . 6. And then it'll need a good-sized tranny cooler to make it live. 100" dome piston but it's only for a 3. Save Share ps. For heads Dart 180 or 200 runner with steam holes drilled . 02/1. In so far as building a 350 with Vortec heads goes you have to almost work hard to avoid a 300 horse engine where it takes little to get 350 horse and do it on regular fuel at least at the 300 level. 025 in the hole 9. ride N/A. Set them in my shed and a guy seen them and traded me a 1967 396" engine with TRW forged pistons and 820 heads for the 305 heads. Out-of-the-box Vortec heads had a slight flow and power advantage over out-of-the-box "round port" heads. 5:1 rockers. had some type of flat top piston the compression ratio is still in the low to mid 9s so it could benefit from a set of vortec heads which have a 64cc chamber but just be wary of the possibility of having to run higher octane fuel if the compression 383 claimer crank/rods, dished pistons i think in the 14cc range (would be 10 to 1 with 64cc heads) They do not perform like the Vortecs but with a bit of clean up they make a good budget head for a basic engine package. So steamholes must be drilled in non-400 heads. You need a little smaller on a 283 though. If not, figure cc's the same way as in #1 above. Gen. Another example is an engine with 22cc dished pistons and 76cc heads will have 8. Piston to deck plus head gasket thickness equals quench height. I was looking into getting some vortec heads to put on my 283 or the dart 49cc heads. 50:1 compression using flat-top pistons with four “eyebrow” valve reliefs paired with cylinder heads using 76-cc chamber volumes. This way you Go with new flat top pistons. Let's pull him in this discussion. My pistons also looked very dirty for only 1-2000 miles. When you pull the heads, the pistons and If you go vortec and do a cam swap stay with a roller. I'm running stock Scoggin-D1ckey Vortec heads, with modified spring pockets and guides, and GM 1. If you use Vortec heads and if the cam has over . They advertise a 22 cc dome How big is the dish in the OEM 5. The reason you have to know the piston head volume is to figure your compression ratio. Runs good with a 2500 stall. performer intake. 60. What is the difference between the R43/LTS & the R43/LTS6? Virtec heads are good. 050" with a . Extra thick deck surface. Chris (Repointer) is just bought the RHS Vortec heads and recently installed them in his Chevy II. A vortec cylinder head makes a good amount of torque! If you want to spin tires in a 69 truck with (most likely) a 3. If you are boring it out to . U can work on more HP at a later date. 5:1 if you want a cam that is less than 270* on the seat) Performer RPM intake. We pocket-ported a set of stock iron small-block Chevy heads a long time ago with direction from a good friend – Rod Sokoloski – who passed away in 2013. probably around 1250 to 1300. If you dont already have pistons you might want to think about a small dish to get the compression down to 9. I will be running 9. Mild idle. 039 Felpro head gaskets-ported and polished 416 heads with 1. A good quench will be very important as it will help fight off detonation. 100" dome +. Now under the head you want tight clearance between the piston and head where the squish/quench chamber is formed. 94"/1. 8 compression ratio. A 383 is a good start. Would be cheaper and quicker to just change the heads if your planning on running it past 5000RPM. For the classic perimeter bolt 64cc 176cc EQ vortec heads that i plan to buy w/heat riser for my quadrajet. The I stayed with my original heads because I was number matching but I did put in hardened seats however many dispute if they are needed. I believe you will end up running dished pistons to achieve the cr youre looking for, which is fine, they are readily available, and I've heard theyre actually more effecient than flat-top pistons For your goals, and assuming a hydraulic flat tappet, I love the isky 264 megacam for this combo. It ran very good compression numbers and all cylinders look good with the cross hatching still visible. Nice port design. 84 valve on a 305 . 08 gear and automatic trans then get some torque. “The Sallee Chevrolet solution is to use Crane Cam’s 10309-1 drop-in valve spring and retainer kit which is good for . I'm wondering how much lift I could run with these springs on the vortecs at 1. Even at 12. 8:1 The engine will have TPI with hiflow base and runners, so fuel mixture should be consistant across all cylinders, and a good cooling system to keep temps in check. head gasket thickness. 355, forged pistons, Eagle rods, balanced, Iron Eagles, 9. The only difference is the water jacket revision so these heads could be Which "new Vortec heads" were you considering? The ones from 350's/383's with 64 cc chambers and 1. Double humps DO NOT compare. The non ported 906's ran mid-11's on my flat top piston 406 and low 12's on a dished piston 400 this year. with chamber size of 64-76cc i want to do FT in either an 350 or an 377 (383 with out . 041 After reading the link on the Vortec head it makes my old camel humps just some shop art. With it at TDC. 026 gasket and a . 4 compression ratio. 56 gears. TFS 23* heads 64cc chambers. Runs fine on pump gas. I built a 307 with 062 Vortec heads and a . Decided to put a 350 SBC with Vortec heads/ Edelbrock performer RPM intake. 5:1 as long as he has a decent quench distance which depends largely on the piston to deck clearance. Piston Head Volume - 5. 40 and decked . 6, he just keeps romping at me lol i have an easy kill with my ls1 t/a and my 385 stroker gta t/a but i want to beat him with minor One important thing to think about when building a motor is quench distance. 54 compression height piston and not good for mild build ups. 030" overbore recently for a 46 Chevy pickup. 040 or so gasket with a 58cc chambered head and Vortec heads, a CompCams 214* single pattern cam on 108* LSA, . "assuming" they work, im still not exactly sure if i should run the dome pistons and go for big nasty fire breathing cam to correspond with the comp. 500 lift. 5:1 cr. To get the compression up, you`d have to bore it . 5:1 and so don't want to go The L-29 Vortec heads drop right onto a flat-top-piston engine. I have a set of brand new LS3 beehive springs and retainers sitting around. 020 further in the hole giving The pistons are Flat top (I believe Weisco) and are cast I believe (as they had casting marks) but it's been too many years since the motor was actually assembled. 6:1 full roller rockers GM Vortec cylinder heads are used with a Comp Cams Xtreme Energy 262° camshaft to produce 390 HP and 426 ft-lbs of torque. Stock dished pistons, old used Edelbrock Torker Plus cam (similar to Performer RPM cam), stock vortec heads (machined to clear extra lift), alum intake. I *think* these pistons would work. Finding a set of good, used Does anyone know if vortec 454 heads are any good for a performance application. so the edelbrocks might be worth looking into. 030 bore with Vortecs will have the SCR @ approx 10. 94/1. (flat top pistons). These are inexpensive forged pistons from Keith Black for 350 w/5. 500 for a good Canadian 906 down to 210 cfm @ 0. 400 blocks have siamesed bores. With that motors Bore to stroke ratio, its piston speed and the good burn rate of the Vortec chamber I would run a 9. You can modify a old style intake to fit tbi heads with a die grinder but it isn't that easy to modify for vortec heads. Reuse your 650 cfm carb Reuse your headers if they are at least 1-5/8" tubes, but get 2-1/2" exhaust pipe with an X pipe or H pipe and a good flowing muffler. I'm trying to decide which cam and vortec intake to buy. 020" deck height - 0. I need a little higher stall for my TH350 and I'm thinking of bumping the 3. 5:1. i. He said they are a very good head and are comparable to afr's but for quite a bit less money . Top 3 Best Cam for 350 with Vortec Heads #1- COMP Cams CL12-600-4 Thumpr Camshaft. I have a gen 1 350 block that's been rebuilt with . My "real world experience" is with a set of iron Vortecs (which I planned to use from the beginning of my build) and, yes, they require a Vortec-specific intake. 040 Gasket + 0. I had a set of 305 Vortec heads but never took them apart. Top. it runs a good choice of breaking. Hey 41 super delux, you've heard from our resident expert - Bogie - and I support what he says. 800" install height LS3 springs are good to I've run quite a few L31 heads on a 283/292 on the Dynosim and am amazed at the power that can be produced. in the fullness ot time(I'm an old guy), that when Vortec heads first came out Lat year I ran a dished piston 400 with a set of 64 cc Vortec heads and the compression was right around 9. Get some flow tests from Edelbrock and AFR and compare them to stock L31. 025" so that a . 028") without making a cracking problem, you could make 9. 5:1 compression ratio the second video did not give the cam part number. 60 valves & ported Flat top pistons with valve relief . While With 12cc dishes or valve reliefs on my pistons (depending on piston selection) and the large duration of both the XE274 and the Magnum 270H or 280H, I'm going to bleed off enough of that cylinder pressure to stay in the range for pump gas. 7 rod; part number KB727. 906 and 062 castings were both cast in Canada or Mexico I know this post is a couple of years old but it has good info about spark plug selection for L-31 Vortec heads. I have done a few engines with the Vortec heads, all flat tops. 42 rear (these two probably will change later, to better suit high-rpm, but it's what I have) also seen it in other dyno runs with good heads used and The other thing you need to consider is that you are going to be close to 10 to 1 compression with the flat top pistons and the Vortec heads. it's going to effect flame travel, squish and quench. iron or aluminum heads 7. 94 valve vs a 1. 25-10. What I belive to be the problem was I didn't The 906 and 062 Vortec heads are two popular cylinder head options used in small-block Chevy engines. will 305 heads flow pretty good if they are port matched and ports all cleaned up? This Speed-Pro Hypereutetic coated H890CP looks like it has the best mirror for the Vortec heads but it’s a non-vortec specific piston (heavier overall weight, thicker rings, different skirt) and it also has a 1. I went pretty mild with the cam because this is supposed to be a cruiser. Here's my 400/vortec combo. 708" install height. 425 I have done a few engines with the Vortec heads, all flat tops. 040" squish. The pistons were basic flat tops . 025 below deck, the ratio comes in at 8. About 5000--5200 rpm is their upper limit; I'm told porting does wonders. piston crown cc's (either negative or positive) 4. 030 Deck clearance, dont know exactly) Pistons (info from a seller): L2242NF + . They have the same lift I bought a set of vortec 062 heads for it (stock). 5 give or take so you are going to end up at about 9. cast, hyperutics, or forged. 050 quench my Static compression calculates to 9. Ok,seeing the mess that Curley has went through with his decisions on heads. I do not even know if the 1. With flat top pistons and 0. 04-up. The last time I checked, a good set of aluminum heads go for $1000 plus. That combo has been done a LOT because it works very well. It was a gm 260 horse crate motor short block with the crappy dished pistons, using a felpro shim headgaskets and vortec heads. Small Block Vortec heads are the heads than flow better from the factory. For a street engine; this needs to be . As mentioned by several members a take out ZZ4 cam would be good, the HOT cam is great too but pricey with a spring upgrade and the 1. You know, there are so many documented examples of great running 350 SBC motors with factory Vortec heads. This is a set of Vortec heads we’ve modified by machining the guides, and adding bigger springs, a set of Summit stainless steel valves, and ARP screw-in studs. hydraulic roller cam small-block using cast pistons and a stack know what goes good with a set of vortec heads? a late model 1 piece seal roller cam block with 2 valve relief flat top pistons and shim head gaskets to get the compression ratio up. I replaced it but now it seems like the #5 cylinder plug is maybe starting to foul out. 625, 259/267@ . Reply. Those went down the Those 305s had dished pistons. in i ran 87 octane at 34 degrees of total timing with the HOT cam and 2 valve relief lightweight forged flat top I built a 307 with 062 Vortec heads and a . If the engine is in good shape you have a 375hp engine that makes good tq as well. I have a 96 350 vortec roller block ZZ4 I need to know if I can use good aftermarket aluminum heads non vortec because I have a edelbrock performance intake non vortec with a That cam fits the vortec heads almost perfectly use 9. Can I use some of them in this motor? Thanks for any help you can offer. A 4. Ran real good . 715 reach, (R42/LTS-R44/LTS) still a good choice for L31 Vortecs? 2. 5:1 with those heads. Thanks for any advice. The most over looked thing in common everyday engine building is not checking the deck height of 3. The 400 heads had a 76cc combustion chamber. I Bowtie, cast iron Vortec head, 175/65cc ports, 2. First of there is better to be had than that 280 magnum. Good thing i just spent an hour researching this because most sales sites call it a 500g piston, C3 Tech/Performance - Advice on heads for a 383 stroker build - I am in the process of building a 383 and have the rotating assembly. 3 extra CCs added in for top ring land volume. 26@106mph with no work other than a valve job to the heads. I'm currently using, Autolite Platinum AP 104 plugs. 020 further in the hole giving you around . The more i research and talk to people the more confused i am about vortec heads. and their "too small" intake runners of 167-170 CCs. Pretty much any cam with a 230 and higher duration you will need at high stall at least 2500 RPM's and heads the have small runners and good flow somewhere around 260. I would use the stock vortec pistons but use a . I assume these would still put me between 10:1 to 11:1 Vortec heads were designed based on the 1996 Caprice 9C1/Impala SS LT1 cast-iron head castings. They do make these for other bore, stroke, rod length combinations. 510 w/234/244 @. 060 inch the lesser amount being the better for No, vortec heads are 062 or 906. Yes, i am 25g undersize on the speedpro pistons. Vortec heads require a vortec intake, but they are by far the best production factory head available. To that end with a . 20 or lil lower, these heads have 1. As tested with Vortec heads, this cam made 409 lb-ft at 4,000 rpm and 372 hp at 5,400. 425 compression height. 045. It's supposed to be in good condition, I'm hoping to dingle-berry brush the bores and re-use the pistons. 50 the exhaust ports are 15/8's" round, it takes 13/4" headers to seal them off, the intakes are about That's the reason my 76cc heads for the 327sbc are starting to look good to me. you want a piston that 1/16, 1/16 and 3/16 rings, about 20 cc dome and whatever bore/stroke combination you have. The 305 w L31 vortec heads is a suprizing good combo when built right. I am currently building a 350 with vortec heads. The vortec heads with the low lift Z-25 cam is a very good match. I pulled the heads off today. ). Considering the difference in combustion chamber shapes, there might be a problem with the dome hitting the head itself. If you have a dome, you'll need to grind the "vane" in the combustion chamber for clearance. The motor will make lots of torque. 040" the only available pistons are the 'rebuilder' pistons that sink the pistons . 935 Hypereutectic 4cc dome pistons-Block . We also did a quick compression ratio evaluation if you were to use these heads. 026 inch composite this is because aluminum wants more cushion between it and the iron block. 736") It sure don't slow it down any. 520* lift, will do the job nicely. Rebuilt a truck 350 years ago, small chamber heads, put domed pistons in it, mild cam, full rebuild, after a year of running one of the studs stripped and it Re: l31 vortec heads They are the best flowing stock head on the intake side. With a 3200 stall converter and 3. 049's would be a good head but have 119cc chambers which will kill your CR unless you add domed pistons. 488/. 2:1. The pistons, deck height and gasket thickness are unknowns but it feels pretty soft down low. 4 I would also use a forged flat top piston, 0 decked, and mill the heads accordingly. 030 = 402 CUI FORGED . 442 lift because of the limitations with stock Vortec heads. Need a Vortec intake. Sony AM/FM/XM/CD, PS & PB. Then we have the Ramjet 350 crate engine which uses that same 196/206º 0. Thanks . SOLD Jesus is my Lord. Good question, easy answer. but on your budget i doubt you will see 500 hp. C3 Tech/Performance - Best SBC Heads and Pistons. Or keep it around the '96 Vortec heads 2. I remember in Car Craft & Hot Rod magazines the Vortec heads were the hot item for budget built SBC. 50 60ft times for 2 seasons. New rings as well and get them pressed on. You put a straight edge across the deck and measure from it to the flat part of the piston. 4. I got a solid 241 cfm on Kev's 2. New pistons are what you want to boost compression. Not satisfied, we yanked it apart, added a set of Federal-Mogul forged flat-top pistons and iron Vortec heads, and dropped this package into our Orange Peel '66 Chevelle. 1 using the thicker . 5 or so. It appears the engine came with 76cc combustion chambers and dished pistons. A swap to a Vortec head with 64cc chambers would bump the compression to somewhere near 9. 10. Vortech heads are the BEST stock Chevy small block heads ever built hands down. I am starting to get really excited about this build and I will let you know the minute this block come back from the machine shop and I will post pics too. 0-9. They can make some power. 5-1 compression with a C3 Tech/Performance - Compression Ratio Question with Vortec heads - I'm trying to finalize parts specifications for a very mild 350 rebuild. The Vortec head uses center bolt valve covers, so your old ones won't fit. Here are my questions: Get it running and warmed up really good, pull the air cleaner and get yourself a big cup of water. My last one used the 2240 speed pro piston and a 106 CC closed chamber head, and with as many tricks as I could find to bump the CR, I still barely made 9:1. I was on the phone with summit and they started to scare me, being a rookie engine dude. 9 CR and my goal is to have a comfortable street engine. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or I ran factory 062 mild ported Vortec's with a smallish hyd cam last year and it was a 10 sec. Good looking centerbolt valve covers or adapters to You are going to need some additional things to use the Vortec heads: 1. The optimum quench is 40-60 thousandts. 030 overbore) looking for a CR of 8. 08 Chevy Vortec Aluminum 350 Cylinder Heads 64cc 2. The motor is I would like to use the short block as is with the flat top heads. However, years ago I built a 305 roller engine with 305 vortec heads. When a beehive breaks it drops the valve. 02 S/R's. Compression is a function of cam timing, you cannot select pistons and to some extent heads till you pick a cam. KB makes a Vortec . 431"/0. 030, deck it . Vortec style intake manifold bolt pattern. 050, 108 lobe sep, 4 degrees advanced AFR 265, Callies 25534351C. The Vortec head is pretty thin in some areas They can be good heads mostly for people who can not afford better or doing your best with what you have. Had the guides turned down That creates an 8. I have been all over the place with what direction to go with this. 0:1 compression ratio, but if all you did was swap on a set of Vortec heads, the compression jumps nearly a full point to a more efficient 9. unless you plan on going to high comp with racing fuel. Just use the 58cc Torquer "305" heads with some decent, prudent bowl and port work. 040" head gasket - 64 cc head chamber Changing the deck height to 0. 80's at 115 mph with 1. Without knowing what pistons are in my block, I'm left guessing at the CR. 6 compression ratio. Angle or Straight plug design. Another option is the Ram Jet 350 cam. 051 which is fine for an aluminum head. 0 manual with upgrades like headers, intake, clutch, air intake, cam and ported heads, exhaust and maybe more, car ran a best of 14. Any head will bolt directly to the block 1965-2007. The stock iron 307 heads use a 70cc chamber while the Chevy Vortec heads are 64cc and the Summit Vortecs are 67cc. 040 to . Save Share Now as for the Vortec heads, from what info I've been able to find out, you can safely flat mill them down . I would have to cut the vortec heads pretty good to get chamber size down but I think it can be done. 00 i really don't know And all 1996-2013 marine Vortec 350 engines engines, which use the same L31 Vortec 350 heads are used with a 196º/206º 0. From 239 cfm @ 0. 84/1. We'd like a usable rpm range of 1000 - 4500. Summit shows the KB135 piston with a quench surface that mirrors a "D" shaped cylinder head quench surface, whereas Speedway shows the KB135 piston with a quench surface that better mirrors the Vortec cylinder head quench surface. I can say I have seen my share of sunken valves back in the day when leaded gas was everywhere. 6 rockers it`s spec`ed for. 550 lift Crower cam 234/244 @ . The Vortec heads have hardened valve seat inserts, too. Good thing 305 flat top pistons are not pricey. and 27" tall tires. 1998 Chevy Z71 Full Size Pick-up Vortec 350 Vortec heads, Lunati 60103 cam. Need to know of any quirks for head gaskets for a sbc 350 with stock dished / 4 valve relief pistons and vortec heads/ LT4 roller cam, freshwater marine use. You'll have to use the self-aligning rocker arms used with all 86 up engines. 48" stroke. 5 or so which is good The Vortec normally runs about 62-63cc's so you are going from 76 to 62 plus there are very few heads that can hold a Plenty of flow for most performance builds, and with a good piston designed for open chambers they have no problem making 10:1 c. 7 to 1 compression Edelbrock performer 2116 intake Qjet I've got 906 vortecs on my 350 with dished pistons and I threw in the Comp 268H with the performer intake. As ssmonte pointed out, towing anything with this setup will be a real exercise in frustration. 420/. The Vortec heads were nice because of the small 100cc chambers and the flat tops it had a 9 to 1 comp ratio. This is honestly my first time building a 350. bore size engine (3. 7L Vortec from a 3/4 ton (4-bolt mains). 60" heads will create about 10. 84-1. I use them with topline/RHS heads. Or, look for new heads. I have access to a complete 97 vortec 454. The 906 heads are the good heads as far as I'm concerned, close to the 062 heads if not the same, and they are Vortec, and have heart shaped Remember we are talking a reliable good street engine here . It is bored . We ran a dish piston 406 with Vortec heads, LARGE hydraulic cam, Super Victor and a Dominator on top. Good heads with tight quench today make more power with 28 degrees than old school heads did with 38 degrees. It was a 454 bbc with flat top pistons and oval port heads. The Wisecos are better, but also have the heavy ring pack. I don`t know what they flow. I believe the 906 casting has many versions of this head. This will have the pistons too far down the bore to allow for proper quench of . Every single one of the dampners is broken along with most of the guides. You'd have to dyno test compare if a equal worked over head works better with a 1. Vortec heads with LT4 springs and retainers. 02's can make good power but can be easily taken out with Vortec and after market performance Stock 400 has dished pistons with about 8-0-8. You would end up with 100CC chamber large oval port that makes 9. 041" Fel-Pro head gasket assuming Vortec heads really kill the main attraction of the 377, which is high rpm power. The extra cost of the intake requirement is very much worth the cost, especially considering how cheaply the Heads are good torque heads. 020-. 94" will help you out in those Vortec heads or hurt you. I've found a pair of Camel Hump heads for cheap that are 64cc. 00 cc Wrist Pin Style Press-Fit or Floating These engines often check in with roughly 8. I'm using a retrofit roller cam from Comp with . 510 lift 9. I would imagine the aftermarket would have much improvement on the exhaust side over stock but, don't know for sure. 040 over standard stroke, standard deck, flat top pistons with 4 valve reliefs, and stock Vortec heads. Scoggin-Dickey sells Vortec heads already correctly modified for use with high-lift performance camshafts. around a 20cc dome will work. 2700+ lb Malibu, it ran 10. 020" thick shim headgasket and 64 cc 2. Thats piston to deck. I'm gonna try a set on a sb. 700r4 tranny Well I got her running and got it timed by ear this was befor I picked up timing light. 35. the sealed power pistons listed are good but very heavy with a heavy ring pack. 450"/. Our criteria is for a street engine, AT with stock torque converter, 3. 030 OVER**4. Raised intake roof for enhanced air flow. 030 over, the cam was a GM grind, was rather mild around 204 duration, Double roller timing chain, edelbrock intake, Q-jet carb, stock exhaust manifolds, single corked exhaust system, peg leg rear end with snail 2. The H631 is about the same price as the Mahles at $160 per set. 025 piston to deck clearance the total is . 20 over flat pistons and I have nice set of Vortec heads for it. 015 shim gasket over factory dish pistons it will deliver about a 9. I think the pistons were flat tops but I dont remember for sure. THIS CYLINDER HEAD HAS THE FOLLOWING: 190CC intake ports. The AFR and the Blueprint Engines cylinder heads are the L 31 vortec heads Comp 268x cam edelbrock performer intake freshly rebuilt quardrajet all parts came from cliffs high performance. Just converting to a 64-cc Vortec head will instantly bump the compression from 8. The KB piston catalog lists a domed piston (pn KB358) that they say is designed specifically for use with the Vortec head. This is the area from the top of the piston to the deck of the head. With stock 64cc chambers and 0 decked flat tops, you are already at 10. 64, so an actual measurement is needed. Less casting flash, etc. 450" lift on a 110 degree lobe seperation Got a fresh rebuilt 400 shortblock W/ rebuilder dish pistons from a friend. Table of Contents. the deep first gear of the trans made it not scary to pull out in traffic. Had a lunati flat tappet cam with what I remember was 218 duration @ 50 and 500 lift. 025 milled off-. Much above that compression, and you're stuck with pretty high octane gas to not have Piston notch volume CCs. Head chamber CCs. The 049/781 large chamber heads in particular want the small dome 454 pistons to get the cr up in the ball park. It is calculated by adding the distance that the pistons are in the hole + the compressesd thickness of the head gasket. However, 062 has slightly larger valves than 906 Vortec Heads. The XE or VooDoo 268 is a really good off the shelf cam for stock Vortec heads in a flat top piston 350 with an RPM intake, 700+/-cfm vacuum secondary carb, and 1 5/8" headers. Here's a good picture of the drilling process. 2:1 which would What rods and pistons are good for it? I'm on a low budget and have lots of 350 parts laying around. However, the casting If you use iron heads like the Vortec L31 head with a . Are Vortec 454 heads better than the older 454 heads? Or is that just true for the small blocks? It'd be a stock 73 454. 75 lift cam. That said, they are still a bargain and right out of the box, along with flat-top pistons and a mild cam, give my little stock If you have dished pistons then a 64cc chamber maybe a good idea (again, do the math for find compression ratio). 8:1–more than a full point improvement. So the double hump 2. Nice. Hi, currently building a 406 sbc with 062 vortec heads. Go to the Silvolite / Keith Black pistons website, they have a compression good heads (AFRs mostly, but you can also see that the Vortecs are VERY little behind the AFRs on similar combos) maybe the 350 vortec heads already have the steam holes ,,I don't know, easy to find out by placeing the head gasket on them that goes to the 400, if Easy good setup is vortec heads(ls behive springs/787-16 retainers and stock locks with a comp 280h cam. I'd like to get the most out of my 350 but i'm a fairly novice engine builder and i'm not looking to spend a fortune. Heads were untouched as far as porting just a good valve job but I did put in upgraded valve springs good to 525 If your 454 has the dished or the flat top pistons that is going to be the cork in getting to where you want to be at with any of these heads. to get 500 hp, you will prob need more cam than that. You'll need Vortec specific intake gaskets too. 02"/1. Want a good cruiser with some pep and really strong torque. The 305 version 305 vortec heads #059 have tons of potential. The biggest problem I’ve ever had with the pre-Vortec heads has always been getting a leak free seal, as some of the heads have a really rough sealing surface. 100 bore size, flat top pistons with 5cc reliefs, . I got the info on the domed pistons and vortec head clearance from them in 1-2 days. God Bless. 050) is a very good power producing cam for the Vortec head design and at a Do either of these cams seem like they would be a good choice for vortec heads. These numbers are made with 87 octane, while most of the combos on my site used 92 or 93 octane gasoline. 015 shim head gasket. r. dart pro1's alum heads flat top pistons w/ 4 valve relief 10. I do well with the old 601's and the 1. I put together a 350 . I'm thinking used vortec heads, (found a set for $150 with about 180,000 kms on them) a performer rpm intake, a cam and a 750 cfm carb. 55 valves, "small port head" Some of the Vortec heads (like those used in 1-ton trucks) had a lot of iron around the exhaust valve seat and tended to reduce flow. 6 ratio rockers, will easily get you over 400 horse in a 350 and still drive pretty good. Big Block Vortec heads I believe are peanut port heads designed for torque and fuel economy. shjsz bjsi dtjbdx mqzzgud osxg vtjdu nxdi eztk dlsvir onfnb