'09 G8 GT. Kooks 1 3/4" headers, x pipe and Rotofab CAI, VMS 93 octane tune, HSRK. Initial pull said something along the lines of 471 hp, 473 ft lb. Whoops!!!!! They didn't smooth out the shifts so when the car did shift, the torque shot up along with the hp. After figuring out what happened, the results are more realistic. On a Mustang dyno, my G8 got 327 hp, 342 ft-lb. Sound about right? Thoughts?



Mika

That seems low for with headers, but I forget the conversion to a dynojet from a mustang, so maybe someone can work it out.

I've read that there's a 10% gap between the two dynos. So 327=~360 or so hp, and 342=~370ish? But I'm just going by what others have said. I felt the numbers to be low compared to other cars, which put around 350-360 hp, and 360-370 ft. lb. on dynojet. It'd be nice to confirm the 10% guesstimation or so. I am going to put a cam in it and eliminate the DOD, so if nothing else this is a good measuring tool. I'll probably go back thought so I can get the same dyno(Mustang).



Mika