Top end

[Matt00695]

Hey guys I have a question in regards to top end builds. I just want to know if I bore out my cylinder and get an oversized piston, do the piston to cylinder clearance specification remain the same as the OEM one? And does the ring end gap have to be the same as the OEM specification?

For example, if the bore size goes up to 64.50mm will I still need a piston to cylinder clearance of (0.0024 - 0.0026 inches).  And will I still need my ring end gap of (0.012 - 0.18 inches). 
 

or will wiseco have different specifications each oversize?

[Keno]

For cast piston follow the OEM guidlines, or what comes with the piston

If going with a forged piston 0.0030"-0.0050"

I'd probably go for 0.0035" and heat cycle the motor a few times.

ring gap http://www.wiseco.com/PDFs/Manuals/RingEndGap.pdf

[Matt00695]

Thank you for the response keno much appreciated. And yea most likely going wiseco when it’s time for the build.