Originally Posted by 93egsohc

Jason: correction factors and ambient temp and lots of other things play a role in HP reading. Also there are many types of dynos with the 3 most popular being:

mustang dyno.

dynojet.

dynapak.

out of the 3 the dynopak dyno will have the highest reading(anywhere from 5-15% higher than the other 2), while the mustang style dyno will read the lowest of the 3.

-Rene