urgent -- bore size plz help
16 August 2006, 03:09 PM
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urgent -- bore size plz help
my forged pistons came today...about to fit them and checked the izes...
now these are 3.642 inchs which is bigger than (92mm/3.62479 inchs)
can anyone give me so idea why this is??? ive heard they have to be bang on 92mm...is this true????
now these are 3.642 inchs which is bigger than (92mm/3.62479 inchs)
can anyone give me so idea why this is??? ive heard they have to be bang on 92mm...is this true????
16 August 2006, 03:54 PM
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Sounds like your new pistons are oversize. 92.5mm if my maths is right. Just means you need the bores honed to suit remembering what clearance they need. Anyone want to add to this...?
16 August 2006, 10:08 PM
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Originally Posted by WRXshaneWRX
ohh jesus..is there anything else ill need to check/change...i bought these thinking they were a direct replacment lol
I'd also check the new pistons to confirm they are 92.5mm. Believe this is the 2nd oversize. (going by Dazdavies thread).
16 August 2006, 10:19 PM
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3.642" is 92.50mm, so it's an over sized piston, designed so if the bores are scratched, or damaged, they can be bored/honed to get perfect surfaces.
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