Jiffy1986 Posted January 23, 2015 Share Posted January 23, 2015 Don't suppose anyone would know but is a focus st170 engine block the same as an ordinary 2.0 zetec? And would an 1800 silvertop head bolt on to it? Seen an St block come up cheap!! Link to comment Share on other sites More sharing options...
Jiffy1986 Posted January 25, 2015 Author Share Posted January 25, 2015 Anyone??? Link to comment Share on other sites More sharing options...
SLEEMAN Posted January 25, 2015 Share Posted January 25, 2015 the st170 bottom end is like a standard 2.0 blacktop bottom end, but with forged internals and high compression pistons, I think I know what you are trying to do, you wanting to increase the compression ratio a cheaper way? i'm not entirely sure that a silvertop 1.8 head will work, I know it works for a silvertop 2.0 bottom end and silvertop head 1.8, but because of the modified internals I think valve clearance will be an issue. personally I would just modify the st170 head and make it flow better and remove the vvt. expensive yes but probably worth it. Link to comment Share on other sites More sharing options...
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