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Ryridesmotox · 02-07-2015, 11:10 PM

Well 243/799 heads have pretty good compression without being milled. I wonder why they would do that unless they built the motor for E85 or race gas. Especially in California with our horrifically poor cat piss 91 octane.

LS1 heads are 10.1:1 stock 68cc chambers
LS6 heads are 10.5:1 stock 60cc chambers

Hopefully they didn't mill them too much. If they didn't, you might be able to rectify the situation with a thicker gasket.

02-07-2015, 11:10 PM	#31
Ryridesmotox Senior Member Join Date: Nov 2010 Posts: 510 Tweet	Well 243/799 heads have pretty good compression without being milled. I wonder why they would do that unless they built the motor for E85 or race gas. Especially in California with our horrifically poor cat piss 91 octane. LS1 heads are 10.1:1 stock 68cc chambers LS6 heads are 10.5:1 stock 60cc chambers Hopefully they didn't mill them too much. If they didn't, you might be able to rectify the situation with a thicker gasket. __________________ The Tow Pig: 2013 Silverado 1500 crew cab The Race Car lol: 2004 Cadillac CTS-V... With things. Better to be judged by 12 than to be carried by 6.