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I got a diff cover with really big fins from Racetorations (Darryl
Uprichard) some 10 years ago and it's a big difference in cooling and =
oil
capacity. In 2011 I ran a new 1:4.33 crown and pinion, and this diff =
cover
was mounted, yet the diff oil got very hot and escaped through the axle
seals. Since then I use to check the T=B0 of the diff casing after races =
and
practices. I ran 4.1 / 3.9 / 4.33 / 4.55 ratio's since 2011 and
experienced so far that the crownwheel/pinions in the diff housing made =
up
for most of the T=B0 rising. With an original old Triumph 4.1
crownwheel/pinion the diff housing stayed really cool. Worst is my 4.33
ratio.
I suppose, the friction between pinion and crownwheel, and hence the =
heat
generated, can be very different depending on manufacturing, assembling =
of
the parts, running in of the diff..
Marcel
_____ =20
Van: Fot [mailto:fot-bounces@autox.team.net] Namens Bill Babcock
Verzonden: woensdag 3 juni 2015 0:32
Aan: Keith Files
CC: FOT
Onderwerp: Re: [Fot] IRS diff overheating
I don=92t know if you=92ve seen the diff cover on Peyote. I don=92t =
remember where
I got it, but it sure solved my diff overheating problems. If nothing =
else
the sheer mass of aluminum helps, but it=92s deeply finned. I=92ve put =
temp
sensing paint on it a few times and the outside of the cover never gets
above 170F. the cast steel banjo never gets above 180F. I doubt the oil
gets much above 250=97there=92s none of toasty sulfur smell when I drain =
it. =20
On Jun 2, 2015, at 2:19 PM, Keith Files <keithfiles@btinternet.com> =
wrote:
We use a diff cooler to avoid the problem on the TR6, a lot cheaper than
continual rebuilds of the diff. I ran with one doing 3 hours of the
Nurburgring Nordschleife a couple of years ago, it worked perfectly.
Keith
Sent from my iPad
On 2 Jun 2015, at 20:01, Kas Kastner <kaskastner@gmail.com> wrote:
I had failure of all three cars at Sebring with the IRS cars. In =
practices
the diffs overheated and puked oil out the breather tub as you describe. =
I
laid part of it to a new diff but most to the heat generated by a disc =
type
limited slip. The capacity of the diff is marginal for endurance =
running.
Add to the capacity or add a cooler.=20
Never be beaten by equipment.
On Tue, Jun 2, 2015 at 10:40 AM, Greg And Alison Blake
<ablake2@austin.rr.com> wrote:
Some of yall may have followed the social Media posts provided by our
teammates through the weekend. We were racing the Beanitos TR6 this past
weekend at what was to be TWS's last ever race. It was a split 16 hour
endurance race (Sat&Sun).
We had a strange failure on Saturday. About 6 hours in, the truck was =
full
of gear oil. I had routed a diff vent line to the trunk. Upon returning =
to
the garage, we discovered melted poly diff mounts. Pic below.
I've been scratching my head on this one. Prior to boiling the diff =
fluid,
we had zero leaks in the freshly serviced diff. I had replaced all seals =
and
filled with STALUBE 90WT GL4.
I've been racing my TR3 using this same diff fluid for 6 years (replaced
every two weekends). Never a problem with my vintage race car. Of =
course,
I've never run the 3 for 6 hours straight.
Some of the more seasoned endurance racers asked what fluid I had in the
diff. All suggested that mineral based fluid is not a good choice for
endurance events.
I'd love to hear opinions as to the route cause of our failure and more
importantly, suggested remedies.
As to the results, the car was running consistently 2:1x laps with a =
fast
lap of 2:10. We ended up taking the workers choice award. Had we run w/o
diff failure and a subsequent battery failure, we could have been in the
hunt for a podium finish. Fastest lap in our group was 2:09.9
Great weekend
Thanks
Greg
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com <http://www.fot-racing.com/>=20
Archive: http://www.team.net/archive
http://autox.team.net/mailman/options/fot/kaskastner@gmail.com
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com <http://www.fot-racing.com/>=20
Archive: http://www.team.net/archive
http://autox.team.net/mailman/options/fot/keithfiles@btinternet.com
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
http://autox.team.net/mailman/options/fot/bill@ponostyle.com
Bill Babcock
Bill@ponostyle.com
Editor: Ponostyle
Celebrating Water
Editor: Xtreme Geezer
Fitness and Fun After Forty
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<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D302131907-03062015>I got a diff cover with really big fins from=20
Racetorations (Darryl Uprichard) some 10 years ago and it's a big =
difference in=20
cooling and oil capacity. In 2011 I ran a new 1:4.33 crown and pinion, =
and this=20
diff cover was mounted, yet the diff oil got very hot and escaped =
through the=20
axle seals. Since then I use to check the T=B0 of the diff casing after =
races and=20
practices. I ran 4.1 / 3.9 / 4.33 / 4.55 =
ratio's=20
since 2011 and experienced so far that the crownwheel/pinions in the =
diff=20
housing made up for most of the T=B0 rising. With an original old =
Triumph 4.1=20
crownwheel/pinion the diff housing stayed really cool. Worst is my 4.33=20
ratio.</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D302131907-03062015>I suppose, the friction between pinion and =
crownwheel,=20
and hence the heat generated, can be very different depending on=20
manufacturing, assembling of the parts, running in of the=20
diff..</SPAN></FONT></DIV>
<DIV dir=3Dltr align=3Dleft><FONT color=3D#0000ff size=3D2 =
face=3DArial><SPAN=20
class=3D302131907-03062015>Marcel</SPAN></FONT></DIV><BR>
<DIV lang=3Dnl class=3DOutlookMessageHeader dir=3Dltr align=3Dleft>
<HR tabIndex=3D-1>
<FONT size=3D2 face=3DTahoma><B>Van:</B> Fot =
[mailto:fot-bounces@autox.team.net]=20
<B>Namens </B>Bill Babcock<BR><B>Verzonden:</B> woensdag 3 juni 2015=20
0:32<BR><B>Aan:</B> Keith Files<BR><B>CC:</B> FOT<BR><B>Onderwerp:</B> =
Re: [Fot]=20
IRS diff overheating<BR></FONT><BR></DIV>
<DIV></DIV>I don=92t know if you=92ve seen the diff cover on Peyote. I =
don=92t=20
remember where I got it, but it sure solved my diff overheating =
problems. If=20
nothing else the sheer mass of aluminum helps, but it=92s deeply finned. =
I=92ve put=20
temp sensing paint on it a few times and the outside of the cover never =
gets=20
above 170F. the cast steel banjo never gets above 180F. I doubt =
the oil=20
gets much above 250=97there=92s none of toasty sulfur smell when I drain =
it.
<DIV><BR></DIV>
<DIV>
<DIV>
<BLOCKQUOTE type=3D"cite">
<DIV>On Jun 2, 2015, at 2:19 PM, Keith Files <<A=20
=
href=3D"mailto:keithfiles@btinternet.com";>keithfiles@btinternet.com</A>&g=
t;=20
wrote:</DIV><BR class=3DApple-interchange-newline>
<DIV>
<DIV>
<DIV>We use a diff cooler to avoid the problem on the TR6, a lot =
cheaper than=20
continual rebuilds of the diff. I ran with one doing 3 hours of the=20
Nurburgring Nordschleife a couple of years ago, it worked =
perfectly.</DIV>
<DIV><BR></DIV>
<DIV>Keith<BR><BR>Sent from my iPad</DIV>
<DIV><BR>On 2 Jun 2015, at 20:01, Kas Kastner <<A=20
href=3D"mailto:kaskastner@gmail.com";>kaskastner@gmail.com</A>>=20
wrote:<BR><BR></DIV>
<BLOCKQUOTE type=3D"cite">
<DIV>
<DIV dir=3Dltr>I had failure of all three cars at Sebring with the =
IRS cars.=20
In practices the diffs overheated and puked oil out the breather tub =
as you=20
describe. I laid part of it to a new diff but most to the heat =
generated by=20
a disc type limited slip. The capacity of the diff is marginal for =
endurance=20
running. Add to the capacity or add a =
cooler. </DIV>
<DIV class=3Dgmail_extra><BR clear=3Dall>
<DIV>
<DIV class=3Dgmail_signature>
<P><STRONG><FONT color=3D#000099>Never be beaten by=20
equipment.</FONT></STRONG></P></DIV></DIV><BR>
<DIV class=3Dgmail_quote>On Tue, Jun 2, 2015 at 10:40 AM, Greg And =
Alison=20
Blake <SPAN dir=3Dltr><<A href=3D"mailto:ablake2@austin.rr.com"=20
target=3D_blank>ablake2@austin.rr.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE class=3Dgmail_quote=20
style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: =
#ccc 1px solid">Some=20
of yall may have followed the social Media posts provided by our =
teammates=20
through the weekend. We were racing the Beanitos TR6 this past =
weekend at=20
what was to be TWS's last ever race. It was a split 16 hour =
endurance race=20
(Sat&Sun).<BR><BR>We had a strange failure on Saturday. About =
6 hours=20
in, the truck was full of gear oil. I had routed a diff vent line =
to the=20
trunk. Upon returning to the garage, we discovered melted poly =
diff=20
mounts. Pic below.<BR><BR>I've been scratching my head on this =
one. Prior=20
to boiling the diff fluid, we had zero leaks in the freshly =
serviced diff.=20
I had replaced all seals and filled with STALUBE 90WT =
GL4.<BR><BR>I've=20
been racing my TR3 using this same diff fluid for 6 years =
(replaced every=20
two weekends). Never a problem with my vintage race car. Of =
course, I've=20
never run the 3 for 6 hours straight.<BR><BR>Some of the more =
seasoned=20
endurance racers asked what fluid I had in the diff. All suggested =
that=20
mineral based fluid is not a good choice for endurance =
events.<BR><BR>I'd=20
love to hear opinions as to the route cause of our failure and =
more=20
importantly, suggested remedies.<BR><BR>As to the results, the car =
was=20
running consistently 2:1x laps with a fast lap of 2:10. We ended =
up taking=20
the workers choice award. Had we run w/o diff failure and a =
subsequent=20
battery failure, we could have been in the hunt for a podium =
finish.=20
Fastest lap in our group was 2:09.9<BR><BR>Great=20
=
weekend<BR><BR><BR><BR><BR>Thanks<BR>Greg<BR>____________________________=
___________________<BR><A=20
=
href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</A><BR><BR><A=20
href=3D"http://www.fot-racing.com/"=20
target=3D_blank>http://www.fot-racing.com</A><BR><BR>Donate: <A=20
href=3D"http://www.team.net/donate.html"=20
target=3D_blank>http://www.team.net/donate.html</A><BR>Archive: <A =
href=3D"http://www.team.net/archive"=20
target=3D_blank>http://www.team.net/archive</A><BR>Forums: <A=20
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l.com</A><BR><BR><BR><BR></BLOCKQUOTE></DIV><BR></DIV></DIV></BLOCKQUOTE>=
<BLOCKQUOTE type=3D"cite">
=
<DIV><SPAN>_______________________________________________</SPAN><BR><SPA=
N><A=20
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></SPAN><BR><SPAN><A=20
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BR><SPAN></SPAN><BR><SPAN>Donate:=20
<A=20
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/A></SPAN><BR><SPAN>Archive:=20
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<A=20
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A></SPAN><BR><SPAN></SPAN><BR><SPAN></SPAN><BR></DIV></BLOCKQUOTE></DIV>_=
______________________________________________<BR><A=20
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