Originally Posted by Hotrodz

There are a ton of TT build threads with various compression ratios. As Spooler has pointed out the reason you don't hear anything is that it really doesn't matter as the head gasket cylinder walk issue ends them all. As for fuel, 93 octane will not give you the same result as e85 or race fuel. You will be down about 30 to 50whp. There is little difference between e85 and race fuel in the whp game. Race fuel cost more but you get less mpg with e85. E85 because of is high alchohol content run extremely cool so it doesn't add heat to system.

Early on most were doing 9:1. At low compression you need more boost to get XXX whp. So the failures were happening at 23+psi. So now we are seeing failure at 18+ psi with folks doing 11:1.

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