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curtisr · Posted: Fri Jul 08, 2016 9:21 am Post subject: Compression test numbers?

I'm about to embark on testing the compression in my 1987 924s and am wondering what kind of numbers I should see. The 944 workshop manual (which is what is returned when I search online) suggests that any value of 145 psi or more is what I should expect. Knowing the compression ratio is different for the 924s is it reasonable to see such numbers or should I be looking for something else?

Thanks everyone.
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edredas · Joined: 09 Dec 2004 Posts: 861 Location: Charlotte, NC

Yes! Anything over 145 psi is fine for a 924S. My 1987 924S engine right before I pulled it put out to swap in the 951 engine was 175, 182, 180, 175. That said, I wouldn't expect those numbers since that engine was modified, but if you are only getting 145 psi it would imply a worn engine.

I hope that helps!
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'84 944 -White, Brown interior
'84 944 -Red, Automatic
'86 944 -Garnet, Fully loaded, Koni suspension
'87 924S -Red, 300hp 951 swap
'87 924S -Red, Project Car
'88 924S -Red, Daily Driver

curtisr · Posted: Fri Jul 08, 2016 9:41 pm Post subject:

Thank you!
_________________
World's worst welder.