Piston ring end gap

[Pushit2.0]

You want the ring end gap as tight as possible without the ends hitting each other. Heat and bore size are the main things to look at while filling rings. If you bought aftermarket rings they should have a general sizing for ring gap, this much ring gap per inch of bore. If you have a turbo 4g63 with a standard .020 over bore and have a turbo bigger then a 20g and plan to run more then 25psi at some point ~18-20 on the top ring (compression) and ~20-24 on the second ring (scrapper) should be good. If you are planning on a bigger setup or more boost/heat then up the gap a little, or less take some out. Its a judgment call, if you do not know which way to go then you should not build your motor. Also most ring sets have a pre set oil ring end gap (based on bore size for the ring set), but its always a good idea to check this.

~John