Best Comp Ratio for 2.4l

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Nov 28, 2009 | 07:47 PM

#16

Erik@MIL.SPEC

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Quote:

Originally Posted by dambikeracer

You can also alway do 9.5:1 to be right in the middle.

This is what I am going to be going with for my primarily E85 car. 9.5 is marginal for 91 octane but still doable.

10:1 sounds a little high to me for straight pump gas on a turbo car, but I am no engineer or tuner.

Nov 30, 2009 | 12:23 PM

#17

3gEclipseTurbo

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From: ma

Ok so now that 9:1 is the best option what about bore? 86.5mm is stock should i just leave it 86.5mm or over bore? 87mm, 87.5mm,88mm? Is there any real advantage if i over bore, quicker spool?