Quote Originally Posted by PKFIRE View Post
What does a 2015+ stage 3 Roush put down? I'm seeing well over 700whp on pump gas dynos on the internet. Are these tuned beyond roush? They rating them at 670hp. I would think more like mid to upper 500 whp.
Yeah, its a FWHP rating. The tune is a dyno bragging right. Trust me. What Roush claims and is shown on a dyno pull does not translate to performance at the track. That goes for the 575 Phase 1 package of theirs I was running some years back as well as current packages offered aftermarket by Lebanon Ford (unless its a VMP tuned car). The tunes from Roush are so full of protection strategies the car won't get out of its own way. First hand experience speaking here. They deny this when speaking to the engineering department there however. Not going to go into that story, but here are some facts from my 2013 stick shift car.

Fully stock on street tires at the track the car ran a best of 12.77, and ran mostly in the 12.8's constistently.
The Roush package Phase one 575 FWHP setup the car ran 12.71 best ET on street tires.
THe Roush package Phase one 575 FWHP setup with Et Street II DR's on it ran a best of 12.35 at the track.
The VMP retuned package with an 82mm pulley (vice 85mm pulley) with the same DR's ran a best of 11.49 and was running high 11's all the time.

A guy I know who bought a 15 base model with that Roush deal from Lebanon had the same problems. All bark and no bite when it came to putting it down at the track. He retuned with VMP and found a whole world of difference.

Best bet is to look at the VMP Gen II R package. It may look similar to a Roush 2.3 TVS but it is machined internally completely different and actually cast different as well. I've kicked around swapping to the GenII R head and selling the Roush. But I believe I can get to where I want the car to be at with a lot less cost involved or pushing the engine any harder by using what is there and upgrading the converter and other tranny components down the road.