Originally Posted by
StephenB
Steve,
This is for my RX8 with a Grand-AM rear end. Do you happen to know the temperature that is acceptable before they do die? How long before you guys started seeing failures? Was it length of time on track per session, or time on track total? Did changing the diff oil more frequently help... is it needed every session, weeknd, or season? Do you have any suggestions on the best Diff fluid that I should use?
Stephen
PS: I TOTALLY agree that the allowance of a diff coller would allow me to have a competitive advantage over others simply by allowing me to run this rear end safely without the gamble I am going to take. This is why I asked if it was within what others thought was the philosophy of the class. We are allowed to do anything to the rear end which is within the philosophy of the class, this allowance just makes those modifications we are allowed to do more reliable.
Thanks for everyones opinions.
I think what you will find Stephen is that a lot of the diff temp problems in GA were due to the restriction that the stock LS unit be used. They suck and generate quite a bit of heat. The 5.12 is still very stressed in these cars and even more so than the RX7 because of the 9000+ revs that see over 10,000 rpm on the drive shaft. I drop the fluid every race weekend with the RX7 and after practice, before the race at tracks like CMP. Get the gear rem finished if it is not already and buy fluid in 5 gallon buckets to save money. I have always run Mobile 1 75/90 in the RX7 with no failures even in a 13 hour race. The Castrol we run in the GA cars was also very good. If you put AN caps on the diff cooler outlets on that GA setup I doubt anyone will care that you have an extra drain hole.
Last edited by seckerich; 06-28-2011 at 10:57 AM.
Steve Eckerich
ITS 18 Speedsource RX7
ITR RX8 (under construction)
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