01-14-2008, 04:14 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
WB, static compression is 10.5:1.
These are Probe pistons. Their catalog lists these pistons as fitting both inline and twisted wedge valves and having a 25cc dish. When I got them, I cc'd them and they were exactly 25cc's. However, after more inspection, I realized that they forgot to mill the eyebrow for the twisted intake valve. So I had to box them all back up and send them back.
At first I was planning to hit 10.7:1. The new eyebrow added a tad more volume, so my calculator shows I'm at 10.5.
These were the only pistons I could find off the shelf that would work with the 4.155" bore and the 4.100" stroke.
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