[Diy_efi] compression ratio

Dave Williams ronin at aristotle.net
Sat May 11 20:05:57 GMT 2002


elcamino73 wrote:
> 
> I would never do that! The resultant lack of squish is asking for
> detonation. I'm running a .038 clearance from piston to head.
> I don't feel comfortable any closer than that with pistons running $100 a
> piece and heads being $1000 a shot.

 I have gone as tight as .015" (yes, they stuck out of the block) with
.0015" piston to wall clearance.  I've built several at .020-.025".

 The tighter the better, as long as you don't get actual contact.

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