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minimole23

4309 Posts
Member #: 1321
Post Whore

Wiltshire

22nd Jul, 2010 at 09:54:15am

My thinking is - the bigger the initial clearace, the larger the ring gaps will be come rehone / re ring time, so it could pay to go with as little clearance as would be acceptable.

My last engine had 5 thou piston to bore clearance, and although the ring gaps were at the limits of tolerance, it never smoked and had high compression.

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding

wil_h

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9258 Posts
Member #: 123
Post Whore

Betwix Harrogate and York

22nd Jul, 2010 at 01:35:24pm

I agree, always aim for minimum possible as it will increase lengevity of the engine. But if you don't know the minimum, best guess is all you can do.

For instance, the Mega pistons stated that you could run 1.8thou, but as I was turboing I felt 2.5 was best.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.

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