Flycutting affecting Compression Ratio?

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Jul 25, 2005 | 08:51 PM

Mazzenger

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Flycutting affecting Compression Ratio?

How much would flycutting pistons 40-70 thousanths
drop the compression ratio?

Jul 25, 2005 | 09:18 PM

Adrenaline_Z

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From: K-W, Ontario

Depends on the volume of the relief.

Maybe 1-2 c.c. for the fly cuts...drops about 0.2:1 SCR

Jul 25, 2005 | 10:18 PM

JZ'sTA

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Agreed, the flycut dosen't hurt much but will change compression a bit.

Jul 25, 2005 | 10:26 PM

ArKay99

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I looked at the reliefs on the Diamond flat tops. They are ~.150" and ~2.375" diameter. Maybe someone can confirm this. They are 2cc reliefs. They must be ~1/4 the volume of the Diamonds if you are cutting 40-70 thousandths. So I would say somewhere between .5 and 1.0cc, closer to .5cc.

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