sounds like you boiled the oil out the vent tube.

GTM uses it in their $1500 kit!! Tilton makes another one thats heavier and more money but it can be run all day vs just an hour like mine. no i dont think so. the best way to keep it cool is going to be air flow to the cooler, amount of oil, and a good cooler.

i try haha, thanks

in my eyes diff oil should be around engine oil temp or else it will prob break down really fast. ive been told thats 260*. Doran told me once they get up to 300* within 3 laps. now they only race for 45min and im sure they replace after each race. guys like Megan have blown 2 oem diffs up and i bet thats the reason. he races hard and only now after i did mine did he buy parts to do a custom diff cooler. regardless of when the oil starts to break down, i wanted a diff cooler to see if i could race on the VLSD and have it perform. we all know it goes to sh*t when i gets to hot so if i can track at about 240* it might not be a bad LSD to use. but if its 300* like Doran or Megan, then it becomes an open diff and usless.

im sure one could be. since its an hour long pump and track days are 20min at a time, i have it wired to a switch and on with the car on. ill just leave the switch on and never worry about turning it off till i head home. ive let the car sit for hours and the diff NEVER cools down. that 100lbs hunk of iron keeps heat for a long *** time! only in the winter do i notice it takes a long time to reach any heat over 160-170*.

Hmm. That's the engine oil ball park. Sounds like a 200* F thermostatic plate would be ideal, it it can be incorporated easily enough.

I wonder how effective the Nismo finned diff cover is.

Update. So after a track day at mid Ohio my highest temp was 230-240*. Not bad I must say. The factory VLSD might actually be ok in this temp range. I still need to sort things out and push harder, so after I have my rear coils get rebuilt I'll try again and see if the VLSD sucks at all. I believe as long as it stays cool it works.

Now since I was hitting almost 240* I am worried about fluid break down so after a few track days I'll replace it. And yes I know the VLSD has internal fluid which doesn't get replaced. It's just to keep my gears happy.

Glad to see you on the track. :tup:n:driving:

Took awhile I know. Had to get it safe!! $$$$. Now just have to redo everything cause it ain't right haha

You're going head first into that deep rabbit hole. When you getting the trailer and motorhome to pull it to the track now? :rofl2:

Well I've been renting from Uhaul. Did look into a trailer since they blow! I've got no where for it though :(

I'm planning on installed a Differential and Transmission cooler in the next month or so. Last time out autocrossing the car I had synchro engagement problems when the trans got very hot.

I usually idle the car to help with engine temps, this cooks the trans on a 90+ day. Not excited about adding the weight, but it is definitely a necessary upgrade at this point.

Nice write up on the install.


Zack