700BHP would be fairly mental. Wonder if it would ruin the drivability though. I noticed you were on MLR for a time. I bought my first Evo last month, bog standard 8 MR 340. Loving it!
Your going to lose first gear.
Second gear dry upto 650BHP should be fine.
Also its no longer an issue as Whipple as flight control software so you can limit torque/throttle in each gear, so effectively boost by gear so if your the kind of person who just mashes the pedal you can setup the supercharger kit to only deliver so much boost in each gear. So maybe 1st gear, 65%, 2nd gear 90% and 3rd gear up 100% etc.
So the Whipple kits are pretty damn impressive and is why people are managing such fast quarters, one guy is now low 10s at 140mph and just floors the car in 1st gear (AUTO) and it just explodes into acceleration with hardly any slip.
This is what I am really loving about the new Mustang, its great value, its a nice place to be, it corners well all in all its pretty epic for the money.
Even more impressive the above video was the first guys pass and he did a 10.2@140mph seriously quick and its a car you can use every day and it drives just like the stock car drives, until of course your mash the loud pedal.
Bear in mind he has done that on 20" wheels with road tyres, hence his 1.7 60ft time, smaller wheels with slicks you can get that down to 1.2s if you want to trailor it to the track or carry a set of wheels in the boot. I just love the idea you can have a Mustang, not impact its drive ability or reliability and drive to strip, do a sub 10s pass and drive home in comfort and be able to have fun on the twisty bits too.
Here is one going 0-162mph in 15s, again another daily running twin turbos with around 700BHP, but no intelligent boost by gear just driver:
https://vimeo.com/161699897