JETPILOT

iTrader: (51)

Did anyone set up an external remote differential cooler? Anyone know how to set one up? I imagine you will need a pump setup. Anyone have any ideas how to do this?

It looks like the NISMO diff cover is drilled for cooler fittings.



JET

iStan

iTrader: (29)

I can't imagine this being too difficult. There should be enough holes in the diff for an inlet and outlet. Small water pump should do the trick, no?

punish_her

iTrader: (8)

Yes they do look like they are set up for it. It shouldnt be hard to get it done. A 45 deg radius NPT to hose end fitting on the bottom, a solid 90 NPT to hose end on top, a dry sump wired up like an external fuel pump, and a cooler and your set.

You may have to drop the pumpin to get to the top one if its on the back and not the side like in the attachment. This is the NISMO finned cooler and it looks like it will squirt the returned cooled oil onto the diff/ring gear.

I purchased a diff plug to get the thread pitch from but Im leaving town for 3 weeks so no dice on the sizing.

iStan

iTrader: (29)

I have an extra Nismo Diff Cover laying around, I'll see if I can get the pitch from it.

punish_her

iTrader: (8)

looks almost like a m20X1.5 but thats an uncalibrated eyeball

iStan

iTrader: (29)

Looks like a hole to me. Giggity

undrgnd

iTrader: (2)

ARC Diff Cooler

DIY Diff Cooler

SGSash

iTrader: (3)

So we've got an external diff cooler setup on our Race car. Also using the nismo finned diff cover unit.

Basically you have a couple small hurdles to overcome, nothing too serious.

A) return
B) feed to pump
C) where to mount core so that it is not in danger of damage
D) getting the level right and having a good catch can for the vent.

A) usually just drill a hole in the FILL plug and weld an AN-8 bung to it, run the return from the cooler to this.

B) feed is usually done the same way as the return, just with the drain. yes the magnet is gone.

C) there are lots of places, using fans to cool the core rather than natural airflow helps put it somewhere safe. Also using some mesh infront of the core can help protect it.

D) this is the tricky part. You want to fill the diff, run the pump to cycle the fluid, then remove the fill and re-fill with gear oil normally until it spills out. This will ensure that when the system is operating you still have the correct level in the diff. There will be times when (say the system if off for example) the diff level will get a bit too high and start chucking a ton of oil out the vent. It's a good idea to have a catch can setup on the vent so that any fluid that is burped out of the diff gets caught, and doesn't end up all over the back of your car! Trust me, its a mess and makes working on the back half of the car not so plesant.

As for diff pumps, tilton makes a nice one, summit racing has it I think.

go-fast

i would start with a temp sender and plan a cooler after i decided it was needed.it seems the diff is pretty stout and i would prefer hot thinner oil over cool thicker oil.has anyone reported burnt diff oil?

21112

iTrader: (2)

A while back there was a thread on hear about a company making a rear differential cooler.
Never heard much about it after that inital thread.
It was called something like TUT rear differential cooler.
They listed their website as: smis-enterprises.com, but that doesn't seem to exist.

Maybe a search of the web may find them?