Ditty

Yes, 650 whp is pointless on a street car, unless it will be spending a LOT of time on the drag strip.

UPRSharad

UPR's 2010GT has a 5.0L JDM longblock with a Roush 2.3L and it makes 701rwhp. It is probably the most fun car I've ever driven!!

You would definitely want to perform trans & rear end upgrades with that kinda power though.

On the bright side, our car drives perfectly on the street, but runs 9.90 @ 133 on drag radials. GT500s don't do that stock.

hollywub

I was talking to Junior about his stroked 5.0...

What do you do to the T3650? Just more splines?

Does the rear just need axle tube strenghting?

Mishri

Actually hollywub, I was just thinking, the reason I sold my 2007 GT was because to reach my power goals I'd new a new engine and transmission, but the 2011+ GTs can hold enough power to satisfy me stock. So your cheapest bet might be to get a 2011 GT

and really, for 650whp you could get a terminator or a used '07 shelby, i've seen '07 shelbys for 30-35k... about as much as a new GT costs, both can hold a lot of power, but if you want a manual the tranny in the 11+ isn't good, the automatics are amazing, but the manuals are only rated for stock power levels, a lot of people have problems with them.

supercharger + 2011 GT and a few extras would be about 40k - depending on options and extras up to 50k. and get you to 650whp.

it would still be cheaper to mod your existing car though. 12-15k to get your car to 650whp? and if you sold your car for 25k (which would be extremely generous, i wouldnt expect you to get more than 18 or 19k even with the supercharger and mods, 06's sell all the time for under 11-15k now) you would be in the hole 25-30k if you bought a new car. An '07 Shelby might be the 2nd cheapest option after keeping your car.

Toxix

This ^^

hollywub

I def do not put money into a car in hopes of selling it for more... I could actually swap the entire suspension from my car to a shelby with the new 14" rotors and new rims. Convertibles go for more than 15k supercharged with tons of work in it though. But you get .20 on the dollar at best if you add up the mods... Tough choice... Its all monopoly money once you start with the mods...

JCON

650rwhp in a car with a racing clutch is not a lot of fun on the street for daily driving. But with a turbo system you can just turn the boost down

Riptide

The stock 3650 might hold for a while if you treat it nice. Meaning no power shifting and no 6000rpm dumps at the line.

I know someone who ran a stock 3650 for a while with 600+ @ the tire. He put a built automatic in before it came apart on him but he had it out to the drag strip at least once I know of and made some passes. It lived. And he wasn't gentle with it.

hollywub

I haven't "power shifted" a car in 20 years. I have mostly built Porsche and AMG's the last 15 years for 15mph to 120mph speed. I can care less about 1/4 mile times on the street cause I do not run slicks on the car.

The car with 495 rwhp is already ridiculous from 1 to 2nd gear...

I figured if I was building a new short block, why not push the HP up...

onederful100

friend of mine has about 640 rwhp, drives good on the street.
but i dont believe the 640 rwhp gets used totally on the street.
IMO, 400-500 rwhp is more than enough on the street, and more than enough to get you in trouble.
especially with a TS blower, the instant torque on the street can get dangerous if you are careless.
you could always do the engine build, and start the boost lower and see how you like it.