Roush stage 3 questions

[doodguy]

The 670hp they are claiming, is that to the wheels or crank?

I thought the only difference between the roush stage and gt with roush super charger is the tune?

What are they doing that they can claim 700 plus rear wheel horsepower on their stage 2 and 3 kits on on 93 octane?

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[Kyle@ROUSH]

It's rated at the crank however I've been seeing them put 610ish to the tire. Phase 2 rating is crank

 

[doodguy]

It's rated at the crank however I've been seeing them put 610ish to the tire. Phase 2 rating is crank

Kyle, dunno if its top secret, but can you tell me the difference between that and my supercharger? Are they running the 85mm pulley? Is it just a smaller pulley and tune?

 

[Kyle@ROUSH]

Retail Phase 1 and Stage 3 Phase is dimply a calibration difference. The Retail Phase 1 is the Roush/Ford Racing kit is, obviously the one we worked with Ford on, thes Stage 3 has our own in house calibration.

 

[doodguy]

So I'm confused then. If they are both the same cars, tune being the only real difference (minus badges, brakes and suspension); if I put a 79mm pulley on with Lund tune, and Lund is no slouch when it comes to tuning; why am I not hitting much more than 610 to the wheels with more boost? Is it only because the temp here has been in mid to high 90's?

Sorry if I sound dumb, I'm no expert at how cars like. I am only asking so many questions to learn how to get the max enjoyment out of my car. Part of that enjoyment for me is knowing I can drive terribly and still walk a hellcat/Porsche/maybe even some Ferraris heh.

 

[Stage_3]

So I'm confused then. If they are both the same cars, tune being the only real difference (minus badges, brakes and suspension); if I put a 79mm pulley on with Lund tune, and Lund is no slouch when it comes to tuning; why am I not hitting much more than 610 to the wheels with more boost? Is it only because the temp here has been in mid to high 90's?

The high temps will definitely hinder the performance.
Maybe the tune from Lund wasn't up to par? Did you tell them about all your engine modifications, octane rating, etc., etc.? (I'm not knocking Lund tuning, as he and his team are kicking butt on the 2015 Mustangs.)

 

[doodguy]

The high temps will definitely hinder the performance.
Maybe the tune from Lund wasn't up to par? Did you tell them about all your engine modifications, octane rating, etc., etc.? (I'm not knocking Lund tuning, as he and his team are kicking butt on the 2015 Mustangs.)

Yes, we talk every day. To a point I feel bad bad bothering Jon, but he says everything is completely on par. He has gone over the tune bit by bit.

I'm just being horsepower greedy is all. I mean 600+ is a LOT; heck 400 is a lot; I've been putting all this money into the car, I want to get as much out of it as I can.

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