I just got my car dyno tuned yesterday at eipracing in San jose. I just put on the Osiris standard edu and got it tuned there since they are a authorized tuner for them. They were using a Mustang dynometer and from what I've been reading is that dyno reads extremely low compared to other dynos. My base run with a stillen ten 3 intake, Bern HFC's, stillen exhaust, and the programing I got from Uprev is 245hp. Then after they tuned it at eipracing he got 253hp. This guy was saying that the numbers from this dyno he has is anywhere from 20-30% lower than other dynos. So I guess wouldn't put in the neighborhood of 300 if that is the case? But to me that still seems low because I saw someone else on here that says he has 315hp.

 

different dynos, days, cars, mods, etc. These will all affect your numbers. I wouldn't worry too much about what final numbers you got rather than the change in whp. 8whp gain with a tune is not bad considering it was on a Mustang dyno. what fuel is it tuned for?

 

Before (stock) and after FI exhaust:


Baseline at GTM with FI exhaust:


Same car, 2 different dynos on different days and the difference was about 7WHp. I would say this is pretty consistant.

Like Q8y says ... don't worry about what final numbers others are getting, just worry about your own gains.

 

I feel that 1/4 mile is a much better judge of power. 60ft and trap speeds talk.