going to purchase afr 190 aluminum heads for my bird.it has a stock lower end and a modified intake with all the bolt on's-asm runners edelbrock base,ported plenum--running slp 1-3/4 headers also 6 PSI boost-i'm thinking that with the aluminum i can increase compression. so the afr's come at 68 cc,the stock iron heads are 64cc(so i would loose compression) and vettes aluminum heads are 58cc .so should i have them milled to 58 as i know many people are running 6 psi on vetts with no problem.i've also read that vette's hawe the same compression as the iron head l98's even with the smaller cc heads because of a thicker head gasket but don't know if this is bull or not
thanks


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350 tpi,paxton sc,slp exaust@headers

[This message has been edited by icecold (edited November 18, 2001).]

 

I got 68cc AFRs for my as-yet unassembled 355 Vortech S-trim combo. I wanted to maintain a reasonable compression ratio since I'm not going to be intercooled (at least not at first... $$$)

 

seems that i should have them milled to 58cc like the vettes--anyone else running 10-1 comp with low boost(5-6 psi)?

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350 tpi,paxton sc,slp exaust@headers

 

LT1 guys run that, if I'm not mistaken, and do allright. If you're not going intercooled, make sure you have boost retard with that combo.