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Zetec compression ratio limit

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Suttonmotorsport
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2010/06/12 16:59:08 (permalink)
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Zetec compression ratio limit

Does anyone have experience with machining Zetec heads?
The real question here is how much can be removed before the std
cams/valves start contacting the pistons.

I am looking to have a C/R of between 11-11.5:1.

Thanks
Craig

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    martymexico
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    RE: Zetec compression ratio limit 2010/06/12 23:29:52 (permalink)
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    I got 1 head skimmed 0.080th without any problems, Best to buy JE or Probe pistons(10.8:1) which have valve reliefs cut in so you can still whip the head a millimeter or two & run big lift cams. Throw in a set of Eagle conrods for reliability(9000+rpm) My motor is a Blacktop , i also had the block decked 0.025th too.





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    Paul Dunstan
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    RE: Zetec compression ratio limit 2010/07/12 09:54:16 (permalink)
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    Marty

    Can you fit blacktop rods and pistons into a Silvertop block as the cranks are the same?

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    martymexico
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    RE: Zetec compression ratio limit 2010/08/12 23:13:09 (permalink)
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    Paul....i think you just answered your own question there !
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