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Re: [Fot] bike engine oil for overdrive gearbox?

To: FOT Triumph <fot@autox.team.net>
Subject: Re: [Fot] bike engine oil for overdrive gearbox?
From: Duncan Charlton via Fot <fot@autox.team.net>
Date: Sun, 16 Dec 2018 16:05:36 -0600
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
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Don=E2=80=99t most motorcycles that share oil between the engine and =
gearbox use dog gear engagement?  The label on the Honda synthetic =
motorcycle oil I have been using in my NSU 1200 engine (practically a =
motorcycle engine anyhow) touts its favorable effect on dog gears.  Of =
course, that left me wondering what its effect on synchromesh would be, =
so I wondered whether it would be appropriate for my Mini Cooper S race =
engine/gearbox combo.

I have have heard good things about Redline Shock Proof Gear Oil=E2=80=99s=
 ability to keep gearbox temperatures down: =
https://www.redlineoil.com/shockproof-gear-oils =
<https://www.redlineoil.com/shockproof-gear-oils> .  The literature =
suggests that it creates less drag compared to other oils of the same =
viscosity rating.  I use it in the gearbox of the NSU racer but have =
made no attempt to measure how hot it gets with any type of oil.

Duncan
Ps: I=E2=80=99ve been using 30 weight non-detergent oil in the Moss =
gearbox in my Morgan but that=E2=80=99s an unusual gearbox with rather =
balky steel synchro materials.  The redline product I tried gave about =
the same shift feel but the synchromesh oil (AC Delco 10-4014) gave a =
slight improvement in feel and synchro action. =20


> On Sun, Dec 16, 2018 at 9:25 AM van.mulders.marcel--- via Fot =
> 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
> _______________________________________________
>=20
> http://www.fot-racing.com <http://www.fot-racing.com/>
>=20
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>=20
>=20
>=20
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
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>=20
>=20


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">Don=E2=80=99t most motorcycles that share oil between the =
engine and gearbox use dog gear engagement? &nbsp;The label on the Honda =
synthetic motorcycle oil I have been using in my NSU 1200 engine =
(practically a motorcycle engine anyhow) touts its favorable effect on =
dog gears. &nbsp;Of course, that left me wondering what its effect on =
synchromesh would be, so I wondered whether it would be appropriate for =
my Mini Cooper S race engine/gearbox combo.<div class=3D""><br =
class=3D""></div><div class=3D"">I have have heard good things about =
Redline Shock Proof Gear Oil=E2=80=99s ability to keep gearbox =
temperatures down:&nbsp;<a =
href=3D"https://www.redlineoil.com/shockproof-gear-oils"; =
class=3D"">https://www.redlineoil.com/shockproof-gear-oils</a>&nbsp;. =
&nbsp;The literature suggests that it creates less drag compared to =
other oils of the same viscosity rating. &nbsp;I use it in the gearbox =
of the NSU racer but have made no attempt to measure how hot it gets =
with any type of oil.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Duncan</div><div class=3D"">Ps:&nbsp;I=E2=80=99ve been using =
30 weight non-detergent oil in the Moss gearbox in my Morgan but =
that=E2=80=99s an unusual gearbox with rather balky steel synchro =
materials. &nbsp;The redline product I tried gave about the same shift =
feel but the synchromesh oil (AC Delco 10-4014) gave a slight =
improvement in feel and synchro action. &nbsp;</div><div class=3D""><br =
class=3D""></div><div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D""><span style=3D"font-family: =
Verdana, Arial, Helvetica, sans-serif; font-size: 10pt;" class=3D"">On =
Sun, Dec 16, 2018 at 9:25 AM van.mulders.marcel--- via Fot &lt;</span><a =
href=3D"mailto:fot@autox.team.net"; target=3D"_blank" class=3D"" =
style=3D"font-family: Verdana, Arial, Helvetica, sans-serif; font-size: =
10pt;">fot@autox.team.net</a><span style=3D"font-family: Verdana, Arial, =
Helvetica, sans-serif; font-size: 10pt;" class=3D"">&gt; =
wrote:</span></div><div class=3D""><div class=3D""><div =
style=3D"font-family: Verdana, Arial, Helvetica, sans-serif; font-size: =
10pt;" class=3D""><div data-marker=3D"__QUOTED_TEXT__" class=3D""><div =
class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin: =
0px 0px 0px 0.8ex; border-left: 1px solid #cccccc; padding-left: 1ex;" =
data-mce-style=3D"margin: 0px 0px 0px 0.8ex; border-left: 1px solid =
#cccccc; padding-left: 1ex;"><div class=3D""><div style=3D"font-family: =
Verdana, Arial, Helvetica, sans-serif; font-size: 10pt;" =
data-mce-style=3D"font-family: Verdana,Arial,Helvetica,sans-serif; =
font-size: 10pt; color: #000000;" class=3D""><div class=3D"">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?</div><div =
class=3D"">Marcel</div></div></div>_______________________________________=
________<br class=3D"">
<a href=3D"mailto:fot@autox.team.net"; target=3D"_blank" =
class=3D"">fot@autox.team.net</a><br class=3D"">
<br class=3D"">
<a href=3D"http://www.fot-racing.com/"; rel=3D"noreferrer" =
target=3D"_blank" class=3D"">http://www.fot-racing.com</a><br class=3D"">
<br class=3D"">
target=3D"_blank" class=3D"">http://www.team.net/donate.html</a><br =
class=3D"">
Archive: <a href=3D"http://www.team.net/pipermail/fot"; rel=3D"noreferrer" =
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class=3D"">
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rel=3D"noreferrer" target=3D"_blank" =
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/a><br class=3D"">
<br class=3D"">
<br class=3D"">
</blockquote></div><br =
class=3D""></div></div></div>_____________________________________________=
__<br class=3D""><a href=3D"mailto:fot@autox.team.net"; =
class=3D"">fot@autox.team.net</a><br class=3D""><br =
class=3D"">http://www.fot-racing.com<br class=3D""><br class=3D"">Donate: =
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