Lets talk piston ring gapping (specifically CP Pistons):

[e34biturbo]

Okay guys

Will be assisting with another project shortly...doing some research.
looking for feed back or direction on gapping the ring for CP pistons...

Any information is helpful...

[milKt]

+1 on this Q

I have some CPs and the instructions mention a standard spec for gap
(but to have your builder file them to THEIR suggested spec based on whether the eng will be lightly FI or NICELY FI)

[dcvee]

http://www.cppistons.com/LinkClick.a...j8%3D&tabid=61


Don

[milKt]

and the Master speaks
(with digital ink)

[e34biturbo]

http://www.cppistons.com/LinkClick.a...j8%3D&tabid=61


Don

came through again....

[turnerNCM3]

I used the "Street Turbo/Nitrous" spec for my Wisecos as follows:

Cyl Dia (in.) x .0050 in. = End Gap for Top Ring
Cyl Dia (in.) x .0055 in. = End Gap for Second Ring


The gap specs increased for blown race and nitrous race. IIRC I hit somewhere the street and race spec but closer to the street spec side.
I used a ring filer from summit or somewhere. It had a diamond wheel and it does not take much effort to open the ring gap i.e. be careful and measure often.