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John1006
02-21-2012, 02:49 PM
I'm having my block bored over to 86.5 mm for my CP pistons with 9:1 compression. I bought them from a member here so I don't have any paperwork for them. What do I need to tell my machinist for the piston to wall clearances?

di-devol
02-21-2012, 04:03 PM
Call cp.

msglength

Pinggg
02-21-2012, 11:44 PM
.020 over for 86.5 mm i have the same piston on my built SR.

di-devol
02-22-2012, 12:04 AM
That's the size of the bore, not the clearances. He is talking about how much space should there be between they pistons and cylinder wall when the piston is in.

Pinggg
02-22-2012, 12:28 AM
Oops my bad, here are the specs i got with my pistons..

Clearance-0.0035

John1006
02-22-2012, 09:33 AM
Ok that's close to what I was thinking, I tried calling CP, and every time just says waiting for operator. Then just rings forever. Anyone else have any more input on this? And is that in mm or inches?

Pinggg
02-22-2012, 11:50 AM
Doesn't say anything after the number on my spec sheet..
But here give Dustin @ Brian Crower a call 619.749.9018 tell him Kris/Ping refer him.
He'll answer whatever questions you have. Goodluck!

John1006
02-22-2012, 12:40 PM
Alright man, thanks a lot

Pinggg
02-22-2012, 02:16 PM
And if you still need the spec sheet for the machine shop, pm me and i'll take a picture and send it to you.