2.0 focus c/r ratio

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Jun 27, 2011 | 12:30 PM

gixer_1000

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From: Ayrshire

2.0 focus c/r ratio

hi, does anyone know how to work out how many mm to skim off the pistons to lower compression to around 8:1 in a blacktop zetec.

?

i know this is not the ideal way to do things.

but hopefully better than a de-compression plate.

thanks.

Last edited by gixer_1000; Jun 27, 2011 at 01:11 PM.

Jun 27, 2011 | 01:05 PM

SteveB

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If you balls it up I have a brand new set of 2.0 pistons and rods for a black top at home that at some point I'm gonna sell (when I get ropund to it)....

Steve

Jun 27, 2011 | 04:02 PM

gixer_1000

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found this c/r calculator, http://www.csgnetwork.com/compcalc.html

i recon i would need to skim 2mm off the pistons to give me a 8.5:1 c/r

Jun 27, 2011 | 04:05 PM

SiZT

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From: Staffordshire

You'll need to take off more than 2mm as the pistons are dished (not flat-top). I'd think twice about removing that much aswell, it leaves the top ring very exposed

Jun 27, 2011 | 04:43 PM

gixer_1000

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Quote:

Originally Posted by SiZT

You'll need to take off more than 2mm as the pistons are dished (not flat-top). I'd think twice about removing that much aswell, it leaves the top ring very exposed

maybe a no go as i thought they were flat at the top.