Hi compression - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mikep · 01-28-2003, 11:31 AM

Ive never tried it but I understand that if you have aluminum heads, a pretty healthy cam with sufficient overlap and 11:1 or so compression that 92 octane is a possibility. I'm going to a compcams xs 274 s cam . Anyone think I'll be able to run aluminum heads and pump gas with 11:1 ?

BTW I found a good price on top proline aluminum heads ....$775 in kit form with everything needed to assemble including springs, valves, rocker studs , retainers,locks etc. . Thats about $300 less than summit gets for them assembled . The kit for solid lifter engines is $20 more.

01-28-2003, 11:31 AM	#1
mikep Used to have a truck Join Date: May 2002 Location: port orchard WA Posts: 1,552	Hi compression Ive never tried it but I understand that if you have aluminum heads, a pretty healthy cam with sufficient overlap and 11:1 or so compression that 92 octane is a possibility. I'm going to a compcams xs 274 s cam . Anyone think I'll be able to run aluminum heads and pump gas with 11:1 ? BTW I found a good price on top proline aluminum heads ....$775 in kit form with everything needed to assemble including springs, valves, rocker studs , retainers,locks etc. . Thats about $300 less than summit gets for them assembled . The kit for solid lifter engines is $20 more. __________________ No truck :-(



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