maddog20

What ring gaps to use on CP Pistons on d16 w/ .020 overbore. I called Cp and they told me .016 for the top and .018 for the 2nd ring and oil control ring so it doesn't over lap?
After a search I saw most did 18 on the top and 16 on the bottom? Any suggestions?

99B16Si

the top ring gap should be left open about .001-.002 more than the second ring due to the higher heat expansion of the top ring

maddog20

hmm thats cazy! I wonder why they gave me those specs?
I guess they don't like me?

99B16Si

ring gap will also vary from the power output of a motor
less power=less heat=less gap (to a certain extent)

PrecisionH23a

How much boost are you planning on running?

Nextelbuddy

sorry to hijack your thread but i didnt want to start a whoe new thread on a similar quetion.

i have JE pistons 81mm bore 9:1 compression going into a 2001 b18c1. i just got my new JE piston rings that i ordered from JE last week.

what should i gap the rings to? any body in here have the same setup and can tell me what the gap should be on the rings? my HP level i am going for is about 450-500 to the wheels. thanx for any help

maddog20

I 'am hoping around 250ish. 15 pounds on the Greddy kit. I talked to Earl he says bigger on top and CP says bigger on the bottom? They both have good theory behind there thoughts. I don't know I just want to be right.

dennis

https://honda-tech.com/zerothread?id=653324

more cp ring info:

https://honda-tech.com/zerothread?id=740618