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spiff's Avatar
 
Join Date: Aug 2005
Location: Markham, Ontario
Posts: 219
What Compression ratio do I have on my SC?

I was reading this article by Noah:
More power for CIS engines and I'm trying to figure out what compression ratio I have on my 80 SC engine. Anyone know how to tell if it's the 8.5's or 9.3's? If I've already got the 9.3:1 pistons, do I need to upgrade to the 9.5 or 9.8's or just put the 964 cams and I'm done? Thanks in advance.

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99 996 C2
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Old 04-23-2006, 07:05 PM
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If it is a US model, I believe it 9.3,

ianc
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BMW 135i. Nice. Fast. But no 911...

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Old 04-23-2006, 07:39 PM
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Thanks Ianc,
Does this mean it's not going to make as big a difference going to the 9.5 c/r pistons? If I get the cams, (along with SSI's/exhaust) I'll be up a significant amount of power?
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99 996 C2
Black, MY02 wheels, Aerokit
Way too much fun!
Old 04-24-2006, 11:38 AM
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I couldn't really estimate the difference you'd see Spiff, but hopefully someone more knowledgeable will chime in here,

ianc

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BMW 135i. Nice. Fast. But no 911...

"I will tell you there is a big difference between driving money and driving blood, sweat and tears." - PorscheGuy79
Old 04-24-2006, 12:07 PM
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