DJ Gurgla GSR

I've gotten two different answers from two different people at wiseco. so i'm posting here.

Wiseco 81.5mm pistons. approximate 10.0 compression. looking to boost say 10psi at the max (N/A for the break in period)

What should my ring gap be?

Wiseco (1st time) said Top ring .014 - .016 Bottom Ring .015 - .017

Called again Top Ring .016 Bottom Ring .018

Please help me to determine what size i should be using for my application. Thank you.

BoostGoneWild

Well i'm running wiseco piston 84mm and cp rings and what jhon at RaceEngineering told me was between 16-18 top ring and 18-21 bottom, i went with 16 top and 19 bottom and i haven't had a problem.

BoostGoneWild

As long as you are over you are fine last set up i had i was running 19 top and 24 bottom never had a problem. i changed it cause i had 20% leak on #3 piston due to a bad tunner who leaned it out on the dynno,and still like that it got tunnned by another tunner and made 340 whp @17lb which he said i had about 40 hp loss due to the leak down. Total leak down was 10%#1.. 9%#2.. 20%#3... 9%#4..

DJ Gurgla GSR

so .016 top / .018 bottom should be safe & make good power?

BoostGoneWild

i'de say go with a little more on the bottom one just incase it won't hurt

DJ Gurgla GSR

^^ Thanks for your input

anyone else got their two cents on this subject?

looks like .016 top and .019 bottom as of now unless someone speaks up

JDogg

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DJ Gurgla GSR &raquo;</TD></TR><TR><TD CLASS="quote">so .016 top / .018 bottom should be safe & make good power?</TD></TR></TABLE>

that'll be fine, you have small bore so you dont need giant ring gaps

DJ Gurgla GSR

Cool. I'll probably aim for .018 and if i go over a tiny bit, i'll still be ok

Topdawgg

i have 9.4-9.5 compression 81.5mm Wiseco pistons, what would my gap be?

earl

http://www.laskeyracing.com/shop/ringgap.htm