1- can i go 400 whp with supercharging it if yes, what modes do i have to get?
2-how many whp to i have to get to have 500 hp?
3- what is the cheapest turbo kit or supercharging kit for mustang gt?
You'll need a supercharger, obviously. Then you'll need the supporting fuel mods, which have been mentioned. Source a fuel pump of your choice. If you use the pump that comes with most kits, count on getting a BAP. If you're shooting for enough boost to net 400+ rwhp, then you'll need an intercooler or you're just retarded. If you go with air-to-water, you'll need a battery relocation kit. Better get headers, and aftermarket TB/Plenum if you go with a centri. Now you'll need aftermarket exhaust or you're just wasting hp, and you'll need boost and AFR guages, minimum. Then a hand-held tuner, a few dyno runs... you're all set. Of course you won't be able to use any of that power until you do some suspension mods, but I don't want to change the subject of your thread.
Final cost should be upwards of $10 Grand. Easy. And that's if you do the work yourself.
Probably not a bad idea. Most of us here are moderately functional retards who barely are capable of pumping their own gas.
And you guys are a bunch of dicks. This guy's new, cut him a little slack.
1. Who the hell pumps their own gas? I figured you were all rich and fly like me, I throw a homeless guy a $5 bill and buy him a 40 so he'll pump mine for me while I flirt with the fly honeys over at another pump in their convertible.
2. He asked what kind of modes, so I gave him a suggestion on how to get some modes for it. I have no idea why he wants his car to have modes, but hey, his car, his money, and I'm only trying to help. I suggested the Galant VR4 switch because it looks cool.