Advice on Cylinder Heads
I looking for some advice on which cylinder heads to run or if I already have the correct one's or not. The car is a street/strip car that see more "streetracing" than track time. I only go to the track once or twice a year. The specs are below...
Engine: GM Block 496cu. in. (4.31x4.25) 6.385 Rods JE SRP 8.5:1 Pistons (135psi cranking) Cam is a solid roller 255/262@50 .653/.653 114 Pro 1 325 Heads Jesel shaftmounts Dart 4150 Rec. Intake C&S 900cfm Blow-thru carb Procharger F2 (17psi) Non-Intercooled Headers are 2 3/8" Primaries / 4" Collector Exhaust will either be 3 1/2" or 4" C16 racing gas Car: 1973 Camaro 3500lbs. with driver 4.88 gears 33x18.5x15 ET Streets TH400 Trans 9" Converter 4500 Stall |
I don't know about the heads but wondering why you are burning C16? I would think unless your running Nitrous, C12 would be fine for your compression and boost. What do your plugs look like at the end of the day?
Are you just being xtra careful about detonation? |
Originally Posted by davebat
I don't know about the heads but wondering why you are burning C16? I would think unless your running Nitrous, C12 would be fine for your compression and boost. What do your plugs look like at the end of the day?
Are you just being xtra careful about detonation? |
I agree on the on the C16 Over Kill, 110 is plenty.
Them heads are not bad heads at all, I've seen them used on 555's with some port work and work just as good as some Dart 355's. |
fuel rating/heads
I'm with Hammertime here also, those heads flow plenty for your cuin. just cut back on the fuel rating and hang them hoops. You may want to read your plugs after a hard race sometime, just cut the engine off and coast and bring your plug tools, pull a couple and see what they look like, obviously they should be a nice gray color and dry if all is well. Good luck with your combo. :D
Elkyman |
Thanks guys, my only concern about the heads was because of the procharger & 17psi. I see alot of procharged 540's with 355 heads so I wasn't sure if I should have gone with 355's or 345's. Do you guy's think the next time I rip the engine down I should change them to the bigger head or stay with what I have?
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Originally Posted by RaceReadyRacing
Thanks guys, my only concern about the heads was because of the procharger & 17psi. I see alot of procharged 540's with 355 heads so I wasn't sure if I should have gone with 355's or 345's. Do you guy's think the next time I rip the engine down I should change them to the bigger head or stay with what I have?
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If anything, when you tear it down, get a good port job on the heads you have now. That will open them up a little, but the port work should really pick things up.
Adam |
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