Quote:
Originally Posted by porschedude996
Can you explain what is different and or bad with CIS pistons?
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They prohibit the use of aggressive cams. Note, that there are three, that I know of, SC pistons. The compression ratio varies depending on year and US or Euro.
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Gordon
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'71 911 Coupe 3,0L
outlawed
#56 PCA Redwood Region, GGR, NASA, Speed SF
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