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+--- Thread: mystery engine number (/showthread.php?tid=8181)
RE: mystery engine number - Bluebird7 - 26-11-2022
Due to the availability of"sporting" 2 bearing crankshafts, from the likes of Phoenix, Hadley, Tony Betts etc
+ rods and pistons to suit. I am not aware of anybody ever tuning a 3 Bearing for a performance engine apart from possibly a stock Nippy.
There are many more experts out there that will explain , as to why 2 Bearings are best.
RE: mystery engine number - Charles P - 26-11-2022
(26-11-2022, 12:49 AM)Bluebird7 Wrote: I am not aware of anybody ever tuning a 3 Bearing for a performance engine apart from possibly a stock Nippy.
Well there was Colin Chapman.
But back in his day new steel 1.5” cranks weren’t available, and as ever, he only needed an engine to last the length of the race
Charles
RE: mystery engine number - Henry Harris - 26-11-2022
and Stuart Rolt who built 3 bearing engines (supercharged) in the 80’s.
RE: mystery engine number - Charles P - 26-11-2022
(26-11-2022, 11:15 AM)Henry Harris Wrote: and Stuart Rolt who built 3 bearing engines (supercharged) in the 80’s.
Yes. And Matt Shepherd’s race car has a 3 bearing engine that has been remarkably reliable and consistent over the past decade
C
RE: mystery engine number - Reckless Rat - 26-11-2022
Don't say that! Remember what happened to your race car....
RE: mystery engine number - flynbike - 26-11-2022
AND series might be marine "Thetis" engine. Mine has a deep sump with a copper pipe in it, although it isn't used as the specia; has a radiator.
See this link for more info
https://www.archive.a7ca.org/wp-content/uploads/BR_1576A.pdf
RE: mystery engine number - Charles P - 26-11-2022
(26-11-2022, 11:52 AM)Reckless Rat Wrote: Don't say that! Remember what happened to your race car....
He has a better mechanic doing preparation!
RE: mystery engine number - Chris KC - 26-11-2022
Both my Nippy and my Ulster have Rolt 3-bearing engines and I have no complaints.
RE: mystery engine number - Ivor Hawkins - 26-11-2022
My Chummystein has a three bearing motor, it was reliable and went well.
RE: mystery engine number - Charles P - 27-11-2022
(26-11-2022, 03:05 PM)Chris KC Wrote: Both my Nippy and my Ulster have Rolt 3-bearing engines and I have no complaints.
The insertion of the Reliant crank does seem to improve matters but let's be honest, it's not a simple conversion!
c