Hi Mike,
We figured 507 at the flywheel, 6000 rpm, 3000 ft above sea level. The Dyno is an Eddy Current type and really loads up the car. Areodynamic loads are also included.
The shop that did the tuning is
Diablo Performance Cam Koole is the man to talk to about rear wheel horsepower.
I guess there's a lot of controversy over dyno numbers with some shops jacking up their dynos to give good numbers for bragging rights.
I know we'd get numbers anywhere from 330 to 400 RWHP depending on the dyno. The seat of my pants says we've got serious ooomf here. On the dyno we saw 20>78mph in 2.8 seconds starting at 2000 rpm (before the torque comes on!)
It's very hair raising to stand on a car on the dyno and watch the revs climb so fast, nothing like putting my Caravan through the emission test cycle!
Cheers