400 + to the wheels (AWD) on a Mustang dyno is for sure on par with the SAE'ed 480 at the crank.

Pending cars and or drivetrain loss... difference between a Mustang dyno and DynoJet can be 7% to 10%. <O</ODynoJet has load but this can be viewed as the car doing what it does at the wheels through no street load. <O</OMustang Dyno more or less shows the same car under load actually sitting on the street.

<O</OI say the above because they used a hub dyno to see 475 to the wheels in the GT-R which can’t be 20 more HP than what you guys with 997s would see.

<O</OCheers,<O</O
Allen

 

Here is a car we did with the Agency Power exhaust and headers. You can see the before and after. Strong car!

 

The Vivid racing example is just what I would have expected and makes that a very strong car indeed.

430hp and 415tq is right where you should be with those mods. Very nice!

No ECU upgrade on that car?

I thought I read in Excellence that GMG felt 550hp to the flywheel was about all you could get out of the 997TT with stock turbos. Am I wrong about that?

 

Alot depends on the dyno. The Mustang that we use reads about 30-40HP lower then say a DynoJet or DynaPak.

 

Yes. There are just so many variables. It has a lot to do with the guy doing the test too and ventilation. Even amongst Mustang Dynos I have experienced up to a 20% difference.

I guess we should just be pleased if the car drives like we expect and not get hung up on the numbers.