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Re: No more than 10% variation is critical. (archive)

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Posted by eric_m3 on January 24, 2002 at 08:36:23:

In Reply to: M3 compression ? posted by JERSEYJIM on January 22, 2002 at 19:38:10:

Your compression seems to be high. This is not a good thing if the bottom end is stock. Mucho carbon build up on pistons is a major cause of this.

I have not run compression on my 2.5 11.25:1 engine to give you an idea where you are.

However, the most important rule on compression is the limit of variation on all cyls unless it is really low.


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