The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

DBD · 08-12-2014, 11:22 AM

ideal quench is around .040 - there are a lot of ways to get there. thin head gaskets are expensive, but of course you don't change them

so you can leave the pistons .025 down in the hole and use an .015 gasket...or zero-deck the block and use an .040 gasket. I tend not to zero deck on a street build, but there's no wrong answer.

high compression doesn't buy much for the problems it can cause. unless the engine is making a lot of power, 10:1 adds only a few ponies over 9:1...and 10:1 absolutely requires premium gas if the timing curve is set to maximize power.

08-12-2014, 11:22 AM	#42
DBD Registered User Join Date: Jul 2014 Location: Seattle, WA Posts: 267	Re: 400 in the 68 Chevy ideal quench is around .040 - there are a lot of ways to get there. thin head gaskets are expensive, but of course you don't change them so you can leave the pistons .025 down in the hole and use an .015 gasket...or zero-deck the block and use an .040 gasket. I tend not to zero deck on a street build, but there's no wrong answer. high compression doesn't buy much for the problems it can cause. unless the engine is making a lot of power, 10:1 adds only a few ponies over 9:1...and 10:1 absolutely requires premium gas if the timing curve is set to maximize power.