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Piston Rings
Posted: Mon Apr 05, 2010 2:29 pm
by billlobban
I've been helping a mate with his 1098 engine rebuild. He bought a set of pistons from BM which have space for 2 oil control rings (1 below the gudgeon pin and 1 above) and 3 compression rings however BM only supplied 1 set of oil control rings. Is this OK?
Re: Piston Rings
Posted: Mon Apr 05, 2010 2:37 pm
by kittyfell
In the past I never fitted the lower set of rings. Actually, I machined that part of the piston off to reduce weight on my high revving Mini engines.
Re: Piston Rings
Posted: Mon Apr 05, 2010 2:41 pm
by billlobban
This one is being built as per standard (+020) and my mate is, unfortunately, not interested in boosting the output
Re: Piston Rings
Posted: Mon Apr 05, 2010 2:47 pm
by kittyfell
Can only suggest you ask BM. Or, fit the old rings off the old pistons assuming they too were +20?
Re: Piston Rings
Posted: Mon Apr 05, 2010 2:51 pm
by billlobban
kittyfell wrote:Can only suggest you ask BM. Or, fit the old rings off the old pistons assuming they too were +20?
No such luck first rebore from standard Unfortunately although I get on really well with the guys at BM and buy most of my own parts from them I'm not convinced about the level of technical expertise.