I'm putting the 57hp upgrade on my 2016 Stage3 Roush Mustang. How much HP increase can I expect when it is tuned on E85?

 

What 57hp upgrade? Isn't the phase3/stage3 roush supercharged??

 

Yes it is supercharged.

 

Upgrade is smaller pulley, pump drive, plugs, and ecu flash.

 

thats the one that goes from 670 to 727? Well you'll be out of warranty anyways and it looks like buying the reflash will be useless since you want an E85 tune. Looks like it will be cheaper to buy some plugs, a BAP, an 82mm pulley from VMP and a tune from Ken at Palm Beach dyno. I dont know if he will agree to tune it on E85 on a BAP and whatever small injectors you have on there.

 

I'm gonna ride with upgrade until I get everything from Lund of coarse it will need injectors and pump to handle the E85 volume and pressure.

 

I hope you mean pumpS, no 1 pump out there will keep up with the requirements of E85.