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GJF GJF is offline
Slantnose from HELL
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Join Date: Dec 2004
Posts: 809
Originally Posted by AFM744 View Post
Excellent points on the pistons. Mind sharing who had your pistons made, or did you source directly from JE?
In tangent, I cc'd my heads last night. 80ccs is what I got. The stock piston domes displace 3ccs, the stock headgasket (965) is .45mm. I math'd this all out and I got between 7.1 and 7.4:1 depending how I interpret the deck height. So factory static spec is 7.0 and people here saying c/r is actually in the high 6s? The math is the math, right?
You also need to add the deck volume. Porsche sets factory pistons .040.
87 911 Carrera platform
Twin Garrett's, Big Valve, Xtreme Cylinder Heads, JB Racing cylinders and machine work, custom JE pistons, GT2 EVO cams, GT3 oil pump, modified 3.2L intake, 80mm TB, custom Intercooler, equal length headers, DFI, KEP Stage 2 custom twin disc, G50 custom gear set, LSD, Tilton trans pump, Fluidyne cooler
Old 10-03-2008, 04:09 PM
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