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Like most TR racers I believe that an overdrive gearbox is worth some laptime
on most racetracks. But there are some drawbacks :9.5kgs weight penalty and the
gap between 4th gear and 4th overdrive gear is too big. There is also a
considerable amount of power loss when the overdrive is engaged because of the
friction in the overdrive gears : but I think that in general modern engine oil
can reduce the friction in the overdrive, compared to GL-4 gear oil, because it
has much better friction modifiers. But are these friction modifiers compatible
with the clutch in the overdrive?? Classic Mini's and most bikes have 1 oil pan
for both engine and gearbox : what about using a modern bike oil or a modern
(synthetic) classic mini oil in an overdrive gearbox to reduce the friction in
the overdrive and gain some acceleration when 4th overdrive gear is engaged?
Marcel
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<html><body><div style=3D"font-family: Verdana, Arial, Helvetica, sans-seri=
f; font-size: 10pt; color: #000000"><div>Like most TR racers I believe that=
an overdrive gearbox is worth some laptime on most racetracks. But there a=
re some drawbacks :9.5kgs weight penalty and the gap between 4th gear and 4=
th overdrive gear is too big. There is also a considerable amount of power =
loss when the overdrive is engaged because of the friction in the overdrive=
gears : but I think that in general modern engine oil can reduce the frict=
ion in the overdrive, compared to GL-4 gear oil, because it has much better=
friction modifiers. But are these friction modifiers compatible with the c=
lutch in the overdrive?? Classic Mini's and most bikes have 1 oil pan for b=
oth engine and gearbox : what about using a modern bike oil or a modern (sy=
nthetic) classic mini oil in an overdrive gearbox to reduce the friction in=
the overdrive and gain some acceleration when 4th overdrive gear is engage=
d?</div><div>Marcel</div></div></body></html>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/pipermail/fot
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