I have a slight dillemma in prepping my car for NASA. I have a desired weight/whp ratio target for the class I am running. With that being said, if I am ever called on to dyno for an event, they will not have a AWD dyno that I can use. So I will be forced to dyno in RWD, I am not going RWD permanently, so my tracking will be done in AWD, but my dynoing in RWD.

I know dynos measure WHP, but it seems as though if I were to run my car on the same dyno in AWD and then in RWD (lets use mustang for example), that the car could make more hp due to less drivetrain loss, which is the primary reason AWD gets more correction to crank hp. But that wont help me on the dyno because I'll be getting a whp numbers that is higher than what it would have been in AWD is it not?

If this is the case, how much would be the theoretical difference in whp if I were to dyno the car in RWD and AWD on the same dyno on the same day?

 

You should sell the P car and gt your self a GT-R and you will not have the problem...LOL
Just kidding...

I think its 18% loss on the awd vs. 12 % on the rwd..

 

LOL.


Then I'll only be 550 lbs overweight instead of 150. But I can get the magazines to declare my win without even attending nationals.

 

18% is generally the figure used.

 

So how would that translate on the dyno if I were doing 3 pulls in awd and 3 in rwd on the same car same day, should the whpnumbes come out the same?