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Old 04-10-2018, 10:53 AM   #29
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We have used units including Tomei, Kaaz, Cusco, ATS, OS Giken, Guard, and some Drexler types. Cooling is dependent on how the diff is put together and what your application is. Setup configuration is important to consistency and reliability for its intended application.
Do you guys have any data showing different temperature ranges for different setups? And what I mean by setups are changes to preload and lock capacity within mechanical LSD's. I'd be curious to see the effects of different driven/drive friction plate combinations on temperature!

I set my MFactory up myself and have enjoyed the way it engages and reacts. I also had all the plates WPC treated before putting it all together.
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Old 04-11-2018, 10:30 AM   #30
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Originally Posted by CSG David View Post
We have used units including Tomei, Kaaz, Cusco, ATS, OS Giken, Guard, and some Drexler types. Cooling is dependent on how the diff is put together and what your application is. Setup configuration is important to consistency and reliability for its intended application.
David I trust your judgement. I have recently installed a tuned (to my spec from OSGiken) clutch type diff with stock gearing with a stock casing. Stage 2 running Hoosier R7. Car will be TT mostly with occasional DE (testing or such). Is the diff cover required for our cars or an overkill?

I dont mind installing it if the stock cover and fluid capacity is a bottle neck for my NA application. But dont want to put it just because..... @CSG Mike

TIA!!!

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Old 04-11-2018, 02:31 PM   #31
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Originally Posted by fika84 View Post
Do you guys have any data showing different temperature ranges for different setups? And what I mean by setups are changes to preload and lock capacity within mechanical LSD's. I'd be curious to see the effects of different driven/drive friction plate combinations on temperature!

I set my MFactory up myself and have enjoyed the way it engages and reacts. I also had all the plates WPC treated before putting it all together.
Each driver and setup generates different amounts of heat, so unless one of those becomes static (typically driver), the data is purely anecdotal and ultimately not too useful.

As a general rule, if it's not slipping, it's not creating heat.
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Old 04-11-2018, 02:32 PM   #32
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Originally Posted by lutfy View Post
David I trust your judgement. I have recently installed a tuned (to my spec from OSGiken) clutch type diff with stock gearing with a stock casing. Stage 2 running Hoosier R7. Car will be TT mostly with occasional DE (testing or such). Is the diff cover required for our cars or an overkill?

I dont mind installing it if the stock cover and fluid capacity is a bottle neck for my NA application. But dont want to put it just because..... @CSG Mike

TIA!!!

Lutfy
I'm not exactly sure what you're asking. A larger diff cover is an increase in heat capacity, but also means you have to shed more heat afterwards. Unless you're endurance racing, it's generally enough, short of a unique setup.

I use a GReddy diff cover.
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Old 04-11-2018, 03:37 PM   #33
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Originally Posted by CSG Mike View Post
I'm not exactly sure what you're asking. A larger diff cover is an increase in heat capacity, but also means you have to shed more heat afterwards. Unless you're endurance racing, it's generally enough, short of a unique setup.

I use a GReddy diff cover.
Thanks Mike! Definitely understand that everyone is different and will generate different levels of heat in their differential. Also agree with the not generating as much heat if not slipping, I think there is always some level of friction generating heat when the car is in motion.

Did you notice any overheating without the GReddy diff cover? Or was it precautionary?
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Old 04-11-2018, 04:06 PM   #34
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Thanks Mike! Definitely understand that everyone is different and will generate different levels of heat in their differential. Also agree with the not generating as much heat if not slipping, I think there is always some level of friction generating heat when the car is in motion.

Did you notice any overheating without the GReddy diff cover? Or was it precautionary?
With my particular setup, yes. The GReddy adds enough capacity that I can do 50 minute sessions without overheating the fluid now.
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Old 04-11-2018, 05:38 PM   #35
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With my particular setup, yes. The GReddy adds enough capacity that I can do 50 minute sessions without overheating the fluid now.
Nice! Do you plan on adding a cooler?
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Old 04-11-2018, 06:16 PM   #36
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Nice! Do you plan on adding a cooler?
Not at this time
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Old 04-30-2018, 12:50 PM   #37
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Quick update -

I did my first track day with the cover and temp gauge. I saw temps up to ~205F. On the highway up the temperature was between 150-160F.

To give you an idea of my setup as well, I was out on the track for 30 minutes with slicks (245 40R17 continentals) and I was on this track - http://highplainsraceway.com/

Overall I think it's within the limits of the fluid (currently running Torco RTF). I'll probably still take @ATL BRZ advice and switch to Miller Oils for Engine/Tranny/Diff. I'll add it to the never ending list...
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Old 07-21-2018, 08:25 AM   #38
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Quick update -

I did my first track day with the cover and temp gauge. I saw temps up to ~205F. On the highway up the temperature was between 150-160F.

To give you an idea of my setup as well, I was out on the track for 30 minutes with slicks (245 40R17 continentals) and I was on this track - http://highplainsraceway.com/

Overall I think it's within the limits of the fluid (currently running Torco RTF). I'll probably still take @ATL BRZ advice and switch to Miller Oils for Engine/Tranny/Diff. I'll add it to the never ending list...
Great information, thanks for sharing!

Does the diff cover have a gasket or did you use a tube of something?
Does the diff need to be fully removed to install the new cover?
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Old 07-23-2018, 02:32 PM   #39
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Great information, thanks for sharing!

Does the diff cover have a gasket or did you use a tube of something?
Does the diff need to be fully removed to install the new cover?
Diff covers don't use pre-made gaskets, you use RTV or some other liquid gasket material and no, you don't have to remove the differential to replace the cover, if you're referring to the carrier itself, then I would say yes, it's a good idea to remove it from the car to replace the cover, otherwise it'll be super hard to get the cover off and get sealant where it needs to be.
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Old 07-24-2018, 02:21 PM   #40
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Great information, thanks for sharing!

Does the diff cover have a gasket or did you use a tube of something?
Does the diff need to be fully removed to install the new cover?
As others have stated on here before though, if you are going to take the carrier off, be really careful with the 2 bolts that face upward! They cross thread very easily.. I've had mine off many times and I cross threaded it once. Had to buy a tap in that size and clean up the threads along with a new bolt.
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Old 07-24-2018, 07:07 PM   #41
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As others have stated on here before though, if you are going to take the carrier off, be really careful with the 2 bolts that face upward! They cross thread very easily.. I've had mine off many times and I cross threaded it once. Had to buy a tap in that size and clean up the threads along with a new bolt.
Thanks for the tip. Actually just bought this cover directly from Sickspeed (top tip if you chat them they'll give you a much better price). Looking forward to installing it.

Any other advice for the install?
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Old 07-30-2018, 11:55 AM   #42
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Thanks for the tip. Actually just bought this cover directly from Sickspeed (top tip if you chat them they'll give you a much better price). Looking forward to installing it.

Any other advice for the install?
Can't think of anything else tricky
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