The title pretty much says it all. How much HP/torque can i put through the stock rear end without worrying about it self-destructing.
This is for an asphalt-track car, in a series which has very few restrictions. we're looking at using a '95 BMW 325i engine & transmission. 189hp, and 181ft-lbs of torque. primarily because we can get it cheap.
Will the rear end survive an endurance race (18 hours) with that kind of HP going through it?
By the way, we're using fully-synthetic 80-90W gear oil.
I think so but it would help if you removed the crush sleeve and used shims for pinion depth and preload . This set up is stronger and resists pinion deflection due to side loading. Use 75-140w it is only in synthetic form since the spread is so wide. There are many reasons why but trust me it is the best. remember that the 4.10 rears are not as long lived as the 3.65 due to the pinion being smaller.Good luck and let us know.