I would contact KAAZ and see what they recommend.
It's possible that the oil in there now is too thin, causing scuffing wear that a thicker oil may prevent. The tradeoff is the thicker oil will eat a bit of power and it may run hotter. Cooling the oil wouldn't fix this situation. Ideally, I would pull the axles, remove the diff, and evaluate which gear surfaces are doing the wearing. Dave |
It's all the rubbing contact, vs just rolling teeth contact, that shear the diff oil, create heat, and blacken the oil. And it's more than just the worm gear friction.
http://www.sonic.net/garyg/zonc/Tech...ferential.html With no friction, a manual trans will work great (except syncros), but a torsen would act like an open differential. An open spiral bevel gear runs hotter than a trans ... that's why GL4+ gear oil is used to control sliding mesh friction and take the heat. But a Torsen, on a track will create more frictional heat. |
The KAAZ is new. I have only just ran it in. The oil look good when it came out but i had only done figure 8's with it and a little driving about to run it in.
The whole set up weighs very little i would guess at maybe 5 kgs max Scott |
Originally Posted by DamonB
.... I also wouldn't bother to worry about cooling either until I knew I needed to cool them.
http://www.mcmaster.com/ctlg/DisplCt...RelatedCtlgPgs Tke Kaaz diff is also friction based. No heat issue when locked on a drag strip, but powering through long fast corners will really heat em up. Open diff's on other cars I tracked never blackened synthetic oil like the Torsen did. sdminus ... that oil cooler looks a bit small. I recall a local nissan race team that used a diaphram type pump on the rear differential. |
I am now looking to make a transistion from drag strip to circuits I want the car in the best shape to combat this. I will measure the cooler after the weekend to see what you think. The pump is a piston pump.
I opted for the whole thing becasue it was as cheap as a thermo couple. £20 delivered. Thanks for the commets etc. Its much easier with more input. |
How long will the typical road race session be? If it is under 30 minutes I don't think it is as critical to cool down the diff or even the trans. For endurance racing that is another story.
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Originally Posted by gnx7
How long will the typical road race session be? If it is under 30 minutes I don't think it is as critical to cool down the diff or even the trans. For endurance racing that is another story.
ITs gonna be less than 30mins, howeva i plan to do lots of suspension/aero development with the help of a GT3 driver and some good contacts. So the car could be getting lots of abuse for sustained periods. This is going to be a good experiment. I guess it will give a good inication of its nescesity. Scott |
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