which heads for boost
which heads for boost Hey guys, need some opinions on heads. 6.0 callies rods and crank 364. 9.2:1 comp weiseco pistons 78mm single turbo setup 6 speed car, GT7 cam 208/230 554 546 121cl. not sure which heads will go well with this setup or if I should keep the 317's. gonna use vic jr intake but right now is plastic ls intake. any advice would be great, thanks guys.
Thick ones.. Boost requires 3/4 inch thick decks or you will spend more time changing head gaskets than driving, the term lifting up the heads involves just that, the ls engines have head bolts spaced too far apart, and that means, between the bolts or studs, the head will lift under boost just enough to cause a head gasket seal, to let go, then, the rush of hellish combustion chamber heat proceeds to enter the coolant area cosign the engine to rapidly overheat; i say lsa, or ls9 heads are real good, for this purpose, if money is no object, the Mast performance cylinder heads are tops in my book, else PRC by Texas speed, are super, using one of the last two choices will not require, as much boot to create big power, by virtue of their great flow characteristics, just my drop, good luck, David.
At those parameters you should be OK, however if you later decide you want more power, you will face your own imposed limitations, and for that reason, i personally prefer to wait and pay at front for my right to choose, that's just me, now about the use of studs, they are my fastener of choice since they protect the threads and are of way higher quality than factory bolts, BUT, that said, they don't do NOTHING to keep the heads from lifting between studs/bolts or what have you, only thing can help there is, thick decks, or 6 bolts per cylinder, i prefer both, and that's what i have, this all may sound just like I'm reach, i was, till i went out and do all the mistakes i prefer you to avoid, just to end up selling it all, to finally get the rite hardware for the job, off course, now with all the experience derived from embarrassments, long hours of work, wasted funds and more hard labor, it is, my intention to share the other side of racing that never gets discussed, by must who prefer to only tell you their up side, of their stories, like so and so put a super charger on ls7, went to the dyno, and make 875whp, sure he did, just that he stop short of telling what happened during later that same week, off course now you wont hear from him in another six months while he re sleeves the block. these, are a lot of words, but since no one dares, i guess i have to be the one to blow the Whistle, in the name of reason. Just my take, to those who "do" need the many words.
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Thanks guys, but if you were to get heads which would you choose if you had some cash? And camster,thanks for the input I'm shooting for 700 for power max, but prob get greedy later so I'm trying to figure out which to get ahead of time when I want to more and more.
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any head will work at that level
Im building a 408 using the Patriot Stage 3 (317) Heads Dual Valve springs Hardend pushrods.
I would just port your 317s I think you will be happy until you find faith in bigger cubes.
I would just port your 317s I think you will be happy until you find faith in bigger cubes.
I run stage 3 Patriot LS6 heads on mine and no issues around 830rwhp. Remember a lot has to do with the tune....you can get heads to lift with lower boost if the tune is off or running to much timing. I can't stress the importance of a good tune enough lol You'll do just fine with 317's and LS9 gaskets.
the 317s will be more then enough head for the power level you are shooting for,
I have pushed my 243 to 22psi of boost and 21degs of timing with a 9.5 comp. engine with no head problems, killed some other parts but the heads lived
I have pushed my 243 to 22psi of boost and 21degs of timing with a 9.5 comp. engine with no head problems, killed some other parts but the heads lived
Im using the 6.2 liter head gaskets any bad news on these the 5 layer ones, and someone mentioned in another post about using dual valve springs for boost, I got the valve springs with the gt7 lingenfelter cam. I would assume those would be ok for boost if they cam with the cam, anyone here of that?
Hey bad6as how much for the tfs 225 heads, ported or stock, what cc? 65? 70? 68?
Hey bad6as how much for the tfs 225 heads, ported or stock, what cc? 65? 70? 68?
