lowering compression for zetec turbo

CVH and Zetec tuning, suspension and braking mods.
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lowering compression for zetec turbo

Postby MK4 Rick on Sun Mar 15, 2009 10:04 pm

i want to lower my compression on the 2litre zetec using the 1.5mm .i had a look in the haynes manual to have alook at what the compression ratio is and its 10.0.01.so if using a 1.5mm plate and a std head gasket what would it drop the cr to.im after around 8.3.1 or 8.5.1
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Re: lowering compression for zetec turbo

Postby SiZT on Mon Mar 16, 2009 5:41 pm

approx 8.9:1 with a 1.5mm decomp plate, using the 2000 MY Focus Head Gasket my lower it more though. I can PM you the Finis number if you haven't already brought the bits. A 2.0mm decomp plate would take it to approx 8.4:1
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Re: lowering compression for zetec turbo

Postby MK4 Rick on Mon Mar 16, 2009 8:49 pm

please mate that would be great.is it the tripple layer head gasket and how thick is it?
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Re: lowering compression for zetec turbo

Postby freak power on Sat Mar 21, 2009 6:18 pm

1308385 for the head gasket

its a st170/rs one
Now driving a 1999 Audi S3 with 2.1 20v OD HTAGT3582r Turbo

Bring on the 650+Bhp 4x4 monster
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Re: lowering compression for zetec turbo

Postby SiZT on Sun Mar 22, 2009 2:35 am

I also made the thickness out to be approx 0.8mm... that was with a crappy ruler mind, no fancy vernier gauge here!!!
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