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View Full Version : too much piston clearance?

MugeNismo
07-19-2009, 08:32 PM
im measuring my piston to cylinder wall clearance on my sr20det and i end up with an average gap of .0025in i am aware that oem nissan specs are .0004in - .0012in Ive heard of setups with gaps of .0045in with forged pistons, to me that seems like alot even with forged pistons expanding. i wanted to know if you could go any further with oem pistons safely and reliably?
fast-datsun
07-20-2009, 11:24 AM
RE READ you FSM.... do not confuse MM with inch....
MugeNismo
07-20-2009, 01:53 PM
no im very sure all measurements are of inches not mm. if anyone could post up what kind of pistons they have used and the clearance i would appreciate it. or if anyone knows the difference in size between the oem 0 1 and 2 grade pistons would be nice.
lewisfk
07-20-2009, 02:19 PM
well i upgraded my pistons from the stock to to mahle pistons and i had to bore it .20mm over stock! if bought my pistons from enjuku, and theY explained it all to me . MM is the standard.