02GT3897

Would I be at the 280hp mark if I had a cat exuast, underdrive pulley, and k&n cold air? (2002 GT)How much HP is lost from the motor to the rear wheels with a auto trans?manual?

mikev08826

No & No.

Heads, Cams, Full bolt ons will give you 290 - 300

ben790450

280 rwhp? Maybe you could pull it off with every single bolt on out there sans heads, cams, forced induction, or nitrous, but that would have to be one hell of a tuner shop to get that sort of power and you need LT headers too. Shoot i cant even make 280 and i have every single bolt on sans what i mentoned. Thats ok though no mo money goes into my engine! I am just putting more and more money into the suspension and saving so i can throw my 5.1 Twin Turbo Stroker in there someday.

02GT3897

Sorry, I didn't mean rwhp, I meant flywheel hp. I know my rwhp is probably about 220 stock with an auto. Maybe flywheel hp??

ben790450

Oh stock your flywheel hp is rated at 260 but they said the engines actually dyno at 270 to 280 flywheel hp stock. Ford always underrates their $#!+ by like 15 to 20 hp. So you're between 270 and 280 stock already. It doesn take hardly anything to get over 300 flywheel hp on a gt.

alfromcal846

GT engines arent really underrated. Mach 1 and cobras are under rated. stock GT's dyno around 220-225 RWHP

02GT3897

So do you think I am at or very close to 300hp@flywheel with the magnaflows, underdrive pulley, and k&n cold air induct??

02GT3897

So, a good estimate would be about a 40hp loss from the flywheel to the rear wheels using an auto transmission??

pallidamors

More than likely, you would have to add t.b.& plenum, a good midepipe, and a great tune to be at 300 fwhp.

red2k1gt

How would that get you anywhere near 300 at the flywheel...260 hp stock plus maybe 25 hp (without drivetrain loss) is only 285 at the flywheel. Just a sidenote: 5-speeds loose about 15% through the drivetrain.