Quote Originally Posted by mach1 View Post
Hah! What about this, go to the dyno with cold drivetrain, let the motor warm up to 180, make your 3 runs with cold trans/gear oil, done. On track the oil heats up another 75F, 3whp more in racing conditions, trans/diff cooler would help minimize the delta here. No coolers would be a bigger advantage in this example.
To effectively do this, you have to sit in the car with the clutch pushed in while it's warming up. If it is out of gear with the clutch out, the input shaft of the transmission is spinning. If the input shaft is spinning, the cluster gear is spinning. If the cluster gear is spinning, 1st, 2nd, 3rd, and 5th are spinning. With all those gears spinning in the fluid, the fluid heats up a bit. Not as much as if you are under power, but...


Richard P.