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I just had to tear this diff down due to a broken output axle flange. It br=
oke at the typical stress point at the keyway when the clutch started actin=
g up (grabbing) and that put too much instant torque thru everything...yeah=
the hip bone connected to the ... The diff gears and bearings were all in =
great shape,=C2=A0 the pattern looked good and the clearances were spot on.=
Even the Detroit locker looked good. So, who has installed a cooler on the=
ir diff, and how did you route it? The pickup part should be pretty simple,=
but I don't know whether to just reintroduce the oil back into the diff at=
some recess, or should it be aimed on the ring or pinion gears directly? I=
can see plus and minus aspects to each style of setup.
Anyone have good empirical evidence for either?
What sort of pump did you use?
What sort of cooler did you use...radiator style matrix or just=C2=A0 a tub=
e with fins attached (like a power steering cooler)?
Never considered cool myself...
Nick in Nor Cal
-----Original Message-----
From: Marcel Van Mulders <van.mulders.marcel@telenet.be>
To: malaboge <malaboge@aol.com>
Cc: fot <fot@autox.team.net>
Sent: Fri, Aug 12, 2016 12:41 am
Subject: RE: [Fot] IRS Diff Cover
Some years ago, I tried a new 4.33=C2=A0pinion and crownwheel=C2=A0: after =
a=C2=A0road test, the differential housing was already very=C2=A0very hot. =
No way to race with that. It was installed correctly=C2=A0and=C2=A0running =
quiet.Returning to the original 4.1 pinion and crownwheel in the same casin=
g and the same LSD=C2=A0solved this problem. The temperature of the diff is=
a result of how much heat is generated and how much heat is transferred to=
the air. Probably an overheating diff can also=C2=A0be caused by too much =
heat that is generated? LSD of course, but also the heat generated by the p=
inion and crownwheel because of=C2=A0some fault of the parts or the install=
ation.
Marcel
Van: Fot [mailto:fot-bounces@autox.team.net] Namens malaboge@aol.com
Verzonden: woensdag 10 augustus 2016 05:37
Aan: pvucinic@netspace.net.au; fot@autox.team.net
Onderwerp: Re: [Fot] IRS Diff Cover
Nope, no chance of the exhaust...or anything else that might be hot back th=
ere. The heat looked like it came from the diff cover out to the poly bush.=
The bush was melted the most on the back edge where the cover had the bigg=
est mass next to the bushing.
And this is with a Detroit locker, no heat building clutches inside!
-----Original Message-----
From: Peter Vucinic <pvucinic@netspace.net.au>
To: malaboge <malaboge@aol.com>
Sent: Tue, Aug 9, 2016 5:45 am
Subject: Re: [Fot] IRS Diff Cover
Wow! Melted poly mounts! Never seen that before! Sure it's not the exhaust =
systems proximity to the differential casing that's adding to the equation?
Regards
Peter Vucinic
On 9 Aug 2016, at 11:55 AM, malaboge@aol.com wrote:
Oh I'm so jealous of that finned alum diff cover!
BUT, a more practical question...do you think the most oil capacity, or dir=
ected internal oil dispersion is more important. (Already using RedLine hea=
vy shock proof oil).
Some history...
The Duke of Oil, our 4A has melted a set of the poly mounts (see a previous=
pic someone else submitted...same deal here) in=C2=A0 a normal sprint race=
. So, diggin thru the pile-o-parts I find I have an early one piece TR6(?) =
diff cover that is pretty much a square reservoir in the back (the oil rese=
rvoir area looks about like the reservoir on the 2 piece 4A diff cover), an=
d another later (?) one piece cover that directs the oil flingin around in =
the diff toward the ring gear and has more fins on it. However, the later m=
ore heavily finned unit holds about 8 ounces less fluid, but it directs the=
oil directly onto the gear and has those additional fins.
I would really like to skip the oil pump and cooler setup in the back of th=
e car, but may have to go that way anyhow.
BUT,
Has anyone had any experience with running the later, smaller oil capacity =
but more finned and directed oil units? And how would it compare to the lar=
ger open chamber cover?
If not, who has installed a pump and cooler back there? What did you use fo=
r a cooler and where did you put the outlet and inlet on the diff...and why=
?
Usually in hot water myself...this time oil!
Nick in Nor Cal
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
pace.net.au
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<div style=3D"font-size:14pt;font-family:comic sans ms,sans-serif;color:bla=
ck;"><div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;co=
lor:black;"><br>I just had to tear this diff down due to a broken output ax=
le flange. It broke at the typical stress point at the keyway when the clut=
ch started acting up (grabbing) and that put too much instant torque thru e=
verything...yeah the hip bone connected to the ... The diff gears and beari=
ngs were all in great shape, the pattern looked good and the clearanc=
es were spot on. Even the Detroit locker looked good. So, who has installed=
a cooler on their diff, and how did you route it? The pickup part should b=
e pretty simple, but I don't know whether to just reintroduce the oil back =
into the diff at some recess, or should it be aimed on the ring or pinion g=
ears directly? I can see plus and minus aspects to each style of setup.<br>=
Anyone have good empirical evidence for either?<br>What sort of pump did yo=
u use?<br>What sort of cooler did you use...radiator style matrix or just&n=
bsp; a tube with fins attached (like a power steering cooler)?<br><br>Never=
considered cool myself...<br>Nick in Nor Cal<br><br>-----Original Message-=
----<br>From: Marcel Van Mulders <van.mulders.marcel@telenet.be><br>T=
o: malaboge <malaboge@aol.com><br>Cc: fot <fot@autox.team.net><=
br>Sent: Fri, Aug 12, 2016 12:41 am<br>Subject: RE: [Fot] IRS Diff Cover<br=
><br></div>
<div id=3D"AOLMsgPart_2_cfdc9273-0414-43c0-86d0-ce816ebbbd86">
<div class=3D"aolReplacedBody">
<div dir=3D"ltr" align=3D"left"><span style=3D"color: #0000ff; font-family:=
Arial; font-size: small;" data-mce-style=3D"color: #0000ff; font-family: A=
rial; font-size: small;" face=3D"Arial" color=3D"#0000ff" size=3D"2"><span =
class=3D"aolmail_561542107-12082016">Some years ago, I tried a new 4.33&nbs=
p;pinion and=20
crownwheel : after a road test, the differential housing was alre=
ady=20
very very hot. No way to race with that. It was installed=20
correctly and running quiet.Returning to the original 4.1 pinion =
and=20
crownwheel in the same casing and the same LSD solved this problem. Th=
e=20
temperature of the diff is a result of how much heat is generated and how m=
uch=20
heat is transferred to the air. Probably an overheating diff can also =
be=20
caused by too much heat that is generated? LSD of course, but also the heat=
=20
generated by the pinion and crownwheel because of some fault of the pa=
rts=20
or the installation. </span></span></div>
<div dir=3D"ltr" align=3D"left"><span style=3D"color: #0000ff; font-family:=
Arial; font-size: small;" data-mce-style=3D"color: #0000ff; font-family: A=
rial; font-size: small;" face=3D"Arial" color=3D"#0000ff" size=3D"2"><span =
class=3D"aolmail_561542107-12082016">Marcel</span></span></div><br>
<div class=3D"aolmail_OutlookMessageHeader" dir=3D"ltr" align=3D"left" lang=
=3D"nl">
<hr>
<span style=3D"font-family: Tahoma; font-size: small;" data-mce-style=3D"fo=
nt-family: Tahoma; font-size: small;" face=3D"Tahoma" size=3D"2"><b>Van:</b=
> Fot [<a removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__href=3D"mailto=
:fot-bounces@autox.team.net?">mailto:fot-bounces@autox.team.net</a>]=20
<b>Namens </b><a removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__href=3D=
"mailto:malaboge@aol.com";>malaboge@aol.com</a><br><b>Verzonden:</b> woensda=
g 10 augustus 2016=20
05:37<br><b>Aan:</b> <a removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__=
href=3D"mailto:pvucinic@netspace.net.au";>pvucinic@netspace.net.au</a>;=20
<a removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__href=3D"mailto:fot@au=
tox.team.net">fot@autox.team.net</a><br><b>Onderwerp:</b> Re: [Fot] IRS Dif=
f=20
Cover<br></span><br></div>
<div></div>
<div style=3D"FONT-SIZE: 14pt; FONT-FAMILY: comic sans ms,sans-serif; COLOR=
: black">
<div style=3D"FONT-SIZE: 10pt; FONT-FAMILY: arial,helvetica,sans-serif; COL=
OR: black">Nope,=20
no chance of the exhaust...or anything else that might be hot back there. T=
he=20
heat looked like it came from the diff cover out to the poly bush. The bush=
was=20
melted the most on the back edge where the cover had the biggest mass next =
to=20
the bushing.<br>And this is with a Detroit locker, no heat building clutche=
s=20
inside!<br><br><br>-----Original Message-----<br>From: Peter Vucinic=20
<<a removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__href=3D"mailto:pv=
ucinic@netspace.net.au">pvucinic@netspace.net.au</a>><br>To: malaboge=20
<<a removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__href=3D"mailto:ma=
laboge@aol.com">malaboge@aol.com</a>><br>Sent: Tue, Aug 9, 2016 5:45 am<=
br>Subject: Re: [Fot]=20
IRS Diff Cover<br><br></div>
<div id=3D"aolmail_AOLMsgPart_2_c1cd206c-8102-4239-8de1-7431b3b8f0ca">
<div class=3D"aolmail_aolReplacedBody">
<div>Wow! Melted poly mounts! Never seen that before! Sure it's not the exh=
aust=20
systems proximity to the differential casing that's adding to the=20
equation?<br><br>Regards
<div>Peter Vucinic</div></div>
<div><br>On 9 Aug 2016, at 11:55 AM, <a target=3D"_blank" removedlink__7e7e=
d86f-bbdd-454b-a60a-568204435970__href=3D"mailto:malaboge@aol.com";>malaboge=
@aol.com</a> wrote:<br><br></div>
<blockquote>
<div>
<div style=3D"FONT-SIZE: 14pt; FONT-FAMILY: comic sans ms,sans-serif; COL=
OR: black">Oh=20
I'm so jealous of that finned alum diff cover!<br>BUT, a more practical=
=20
question...do you think the most oil capacity, or directed internal oil=
=20
dispersion is more important. (Already using RedLine heavy shock proof=20
oil).<br>Some history...<br>The Duke of Oil, our 4A has melted a set of t=
he=20
poly mounts (see a previous pic someone else submitted...same deal here)=
=20
in a normal sprint race. So, diggin thru the pile-o-parts I find I =
have=20
an early one piece TR6(?) diff cover that is pretty much a square reservo=
ir in=20
the back (the oil reservoir area looks about like the reservoir on the 2 =
piece=20
4A diff cover), and another later (?) one piece cover that directs the oi=
l=20
flingin around in the diff toward the ring gear and has more fins on it.=
=20
However, the later more heavily finned unit holds about 8 ounces less flu=
id,=20
but it directs the oil directly onto the gear and has those additional fi=
ns.=20
<br><br>I would really like to skip the oil pump and cooler setup in the =
back=20
of the car, but may have to go that way anyhow.<br><br>BUT,<br>Has anyone=
had=20
any experience with running the later, smaller oil capacity but more finn=
ed=20
and directed oil units? And how would it compare to the larger open chamb=
er=20
cover?<br><br>If not, who has installed a pump and cooler back there? Wha=
t did=20
you use for a cooler and where did you put the outlet and inlet on the=20
diff...and why?<br><br>Usually in hot water myself...this time=20
oil!<br><br>Nick in Nor Cal<br></div></div></blockquote>
<blockquote>
<div><span>_______________________________________________</span><br><spa=
n><a target=3D"_blank" removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__h=
ref=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a></span><br><span></=
span><br><span><a target=3D"_blank" removedlink__7e7ed86f-bbdd-454b-a60a-56=
8204435970__href=3D"http://www.fot-racing.com";>http://www.fot-racing.com</a=
></span><br><span></span><br><span>Donate:=20
<a target=3D"_blank" removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__h=
ref=3D"http://www.team.net/donate.html";>http://www.team.net/donate.html</a>=
</span><br><span>Archive: <a target=3D"_blank" removedlink__7e7ed86f-bbdd-4=
54b-a60a-568204435970__href=3D"http://www.team.net/archive";>http://www.team=
.net/archive</a></span><br><span>Forums: <a target=3D"_blank" removedlink__=
7e7ed86f-bbdd-454b-a60a-568204435970__href=3D"http://www.team.net/forums";>h=
ttp://www.team.net/forums</a></span><br><span>Unsubscribe/Manage:=20
<a target=3D"_blank" removedlink__7e7ed86f-bbdd-454b-a60a-568204435970__h=
ref=3D"http://autox.team.net/mailman/options/fot/pvucinic@netspace.net.au";>=
http://autox.team.net/mailman/options/fot/pvucinic@netspace.net.au</a></spa=
n><br><span></span><br><span></span><br></div></blockquote></div></div></di=
v>
</div>
</div></div>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
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