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Tracking / Autocross / HPDE / Drifting What these cars were built for!


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Old 08-11-2020, 07:24 AM   #15
Joveen
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Here you go.

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Old 08-11-2020, 07:24 AM   #16
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Originally Posted by 86TOYO2k17 View Post
Been using an ebay one for a while with no issues. Aluminum-Rear-Differential-Cover-for-FT86-GT86-Subaru-BRZ-Scion-FR-S-13-Black. Was 120$ now 130$. Looks 100% identical to cusco probably made at same production facility after hours. It’s a somewhat “basic” part so I’m not too concerned with “quality” the flat surface where gasket seals was flawless for a perfect seal. The rest of it looked perfect as well. I know how some people are with Chinese knock offs though, depending on the part/price I’m the same way. But I don’t see 800$ of value in one of these for how simple it is. 350-400$ would have been a good price point for “name” brand.
ha-ha! Thank you! Even the description is almost verbatim.
For $130 It's worth a try. Thanks again, dude!
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Old 08-11-2020, 03:22 PM   #17
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ha-ha! Thank you! Even the description is almost verbatim.
For $130 It's worth a try. Thanks again, dude!
I just got one of those for my track car. It is a damn fine looking part for $130!
I recently installed a thermocouple on the diff and it was heating up above 300 deg in around 20 min. I am hoping the extra surface area of the aftermarket cover will help keep things cool.
I wouldnt trust the rubber o rings on the oil cooler fitting plugs. Use a good thread sealer instead.
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Old 08-11-2020, 03:53 PM   #18
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Let us know what difference it makes on the track. I would think capacity and fins might slow the temperature rise.
Glad to see someone has put a thermocouple on one.
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Old 08-25-2020, 08:27 AM   #19
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Let us know what difference it makes on the track. I would think capacity and fins might slow the temperature rise.
Glad to see someone has put a thermocouple on one.
I would expect the extra capacity to slow the temp increase rate, but only slightly.
I expect the additional surface area to slow the rate of increase and reduce the maximum temp.
Hopefully it will reach an equilibrium point at a reasonable temp. I would like to keep it below 300 deg regardless of the run time.

I hope to get back on track within a month and will post results.
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Old 10-21-2020, 03:15 AM   #20
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@ROADRACER do you have an update?

With 4.56 gears, over 3 hours cruising on the highway at 80+ is long enough for my diff to start puking out fluid from the vent hole.
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Old 10-21-2020, 03:13 PM   #21
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I did a day at AMP a couple weeks ago. The diff stayed under 250 degrees but it was a much cooler day and a different track with lower speeds than before. I cant really say how much cooler the diff would be under identical conditions, but the cover does provide a significant increase in surface area and seems like a quality part.
Next summer I will be able to test on another really hot day.
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Old 10-21-2020, 04:38 PM   #22
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Quote:
Originally Posted by 86TOYO2k17 View Post
Been using an ebay one for a while with no issues. Aluminum-Rear-Differential-Cover-for-FT86-GT86-Subaru-BRZ-Scion-FR-S-13-Black. Was 120$ now 130$. Looks 100% identical to cusco probably made at same production facility after hours. It’s a somewhat “basic” part so I’m not too concerned with “quality” the flat surface where gasket seals was flawless for a perfect seal. The rest of it looked perfect as well. I know how some people are with Chinese knock offs though, depending on the part/price I’m the same way. But I don’t see 800$ of value in one of these for how simple it is. 350-400$ would have been a good price point for “name” brand.
Without the original innovator, the knockoff can't exist.

It's like the signs some shops have that say "if you keep purchasing all your parts from Amazon, one day, we won't be around to install the parts for you".

That said, the Cusco one was too steep for me, and I use a GReddy diff cover that costs $450 and also increases capacity and adds ports for sensors/coolers.


https://www.counterspacegarage.com/g...iff-cover-gt86
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Old 10-21-2020, 05:29 PM   #23
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I’m with Mike on this. I think the Greddy is a superior design internally as the flat back diff covers aren’t designed with the ‘flow’ of the oil in mind (see Banks video).

After running with the heat shields on the exhaust, I couldn’t recommend that solution enough as our exhaust pipe is dumping lots of unnecessary heat into our diffs.
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Old 10-21-2020, 09:47 PM   #24
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After running with the heat shields on the exhaust, I couldn’t recommend that solution enough as our exhaust pipe is dumping lots of unnecessary heat into our diffs.

The heat shield, is it something you bought, or DIY?
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Old 10-22-2020, 12:14 AM   #25
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I've been running the FT86 cover for the past year racing as well, figured I would save a few bucks from the Cusco one. Literally every Cusco part I've used is really nice, and works well. I would expect their diff cover (and copies) to be no different. Greddy setup is really nice too. I was honestly just more enticed by the cooling fins, so that's why I went with the FT86 cover.

I run 20min sprint races, and probably change my Giken fluid too often, but it comes out looking fantastic every time. It looks so good that I haven't even bothered putting a temp sensor in.

I'm installing a new R&P this winter, so will get to inspect everything and see if any abnormal wear is present. I don't expect to find any.
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Old 10-22-2020, 02:21 AM   #26
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The heat shield, is it something you bought, or DIY?
DIY. Also keeps the exhaust from boiling the grease out of the axle.

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Old 10-23-2020, 03:37 PM   #27
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DIY. Also keeps the exhaust from boiling the grease out of the axle.

https://www.ft86club.com/forums/show...&postcount=134
+1

I mounted up a axle shield as well.

I also re-packed my axles with Redline CV2 grease. Full spare set re-packed as well. The OE grease is junk, even with just street use.
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Old 10-20-2021, 03:00 PM   #28
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@ROADRACER any more testing on the temps? Considering a Harrop or Greddy version for the diff I'm building. Cusco is just too expensive.
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