ring end gaps

[simonjrwinter]

I'm building a 331 stroker with a compression ratio of about 9:1 with a view to supercharging it at a later date. What sort of end gap should I have on my rings?
Thanks
Simon

[BB427]

I am sure you will get alot of different input on this. This is what I do but most of my engines are for drag racing.

I hope this helps.

Top ring
Mild build = .004 X bore
Drag perf. = .0045 X bore
Nitrous = .008 X bore
Supercharged = .006 X bore

2nd ring
Mild build = .003 X bore
Drag perf. = .0035 X bore
Nitrous = .0065 X bore
Supercharged = .005 X bore

[wilf leek]

Simon - also be guided by your piston manufacturer's recommendations.

Some good info on the KB piston website. Go look at http://www.kb-silvolite.com/page05.htm