Quote:
Originally Posted by Joelcool
OK, I understand that a stock Viper looses about 12% to 15% from the crank to the rear wheels. For example, a stock GTS came with 450 HP, using the 12% figure equals 396 rwhp or a 54 rwhp loss (so it takes 54 RWHP to move the drive line). Heres the part I don't get....say you S/C it like some of us have done and you get 835 rwhp. Using the 12% drive line loss, this means crank HP is about 949 (949 x 12% = 835, or simply a loss of 114 rwhp) My question is this, what would cause the increase in loss if nothing changes other than HP going up. I'm simply looking for the answer to this question. Does my GTS have 949 crank HP or 889 crank HP. I'm betting on the latter but just want to know the correct answer and why.
Thanks in advance, Joel
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The force on the gear faces increases with torque. There are three losses that I can think of, two of which remain constant. You have the friction between gear faces and bearing losses (probably the biggest factor), the windage losses, and the inertial losses. So basically one changes and the other two stay the same. It would be interesting to see what those percentages are.