Question about stock 4.6 V8 hp.

[pts02GT]

I am planning on purchasing a used 2002 GT sometime in September/October as a birthday gift for myself. It will be my first Mustang ever owned and I am psyched.

One question I have however is how come at some cardomain websites, some people with 2002 V8 GT's have only around 250/255hp?

I thought V8's come stock with 260?

I dont want to be ripped off or anything. Is that any way I can tell how much HP there is other than a dyno?

Thanks.

 

[1low03gt]

260 is factory flyhweel rated horsepower .
Rearwheel should be in the neighbourhood of around 230 give or take.

 

[twogts4us]

The advertised 260 HP is a flywheel rating. But what we talk about out here is a true RWHP rating. The 99-04 GTs, rated at 260, actually generate about 220-225 at the wheels on a 5 speed, a bit less with an automatic.
Welcome to StangNet!!!

 

[StangFreak32]

the 99-04 gts have 260 hp at the crank not at the wheel.....hp at the wheel will be anywhere from 15%-25% lower than whats at the crank....when u dyno ur car it rates hp at the wheel not the crank so when u see someone with a 02 gt saying their hp is 230 dont freak thats normal

 

[pts02GT]

Thanks for the help...thats still a pretty good amount of hp right?

 

[Blue Blurr]

actaully i saw dyno results and a modified Gt with Intake and X pipe got 206 wheel hp.

 

[pts02GT]

^^ howd that happen

 

[DBMSTNG]

actaully i saw dyno results and a modified Gt with Intake and X pipe got 206 wheel hp.

either it was a 96-98, or it had something majorly wrong with it.

 

[1low03gt]

Had mine dynod at SHM ,with catted mac h pipe,flowmaster 2 chamber mufflers,HOT air intake(ditch for K&N in stock air box now),and steeda timing adjuster(ditched for a Superchips customed tuned chip know),my stang dynod at 250 hp,and 292 lbs rear tires .
When i dynod her with 1500 km's,and stock(canadian ),she gave out 230 hp,and 280 lbs .

 

[Joel's98GT]

To clarify, The 260hp is Net Brake Horspower.(BHP)
It is measured from the fywheel with all accesories AND full exhaust, using a brake to apply load on the engine.

 

[drexebo]

actaully i saw dyno results and a modified Gt with Intake and X pipe got 206 wheel hp.

It's called a mustang dyno...

 

[FallenPhoenix]

I don't understand them saying 250-255 if they're stock. The numbers in my sig are completely stock with ~1200 miles.

 

[SVTStang03]

My 2000 GT has very few mods (X-Pipe,Catbacl,CAI,75mm TB) and I have 277 RWHP SAE/ 312 RWTQ... I think every engine varies a bit...

 

[twogts4us]

My 2000 GT has very few mods (X-Pipe,Catbacl,CAI,75mm TB) and I have 277 RWHP SAE/ 312 RWTQ... I think every engine varies a bit...

Engines don't vary that much! Actually I think it's the dyno that varies this much...I mean, this just doesn't add up...about 55 RWHP over stock with a mid pipe, catback, CAI and TB?

 

[twogts4us]

I don't understand them saying 250-255 if they're stock. The numbers in my sig are completely stock with ~1200 miles.

He must be referring to modified Mustangs RWHP numbers. Your numbers are right on par with what a new stock GT should crank out...actually a few higher than I would expect to see. But no two dynos (or dyno runs) are equal - and, in the end, they're just numbers. A better number is how quick and how fast in the 1320.

 

[CottonBurnerz]

My 2000 GT has very few mods (X-Pipe,Catbacl,CAI,75mm TB) and I have 277 RWHP SAE/ 312 RWTQ... I think every engine varies a bit...

I'd like to see a graph of that.. amazing numbers though..

 

[billyfe390]

Every engine varies with the elevation its at as well as the calibration of the dyno.

 

[FallenPhoenix]

I'm assuming we're talking SAE corrected numbers

 

[SVTStang03]

Here is my graph before the TB or CAI. Dyno-Comp in Scottsdale, AZ did all my dyno work.

 

[SVTStang03]

My car has been on the dyno about 5 times at 2 different locations... All the numbers are within a few HP/TQ... I dunno maybe I lucked out... Although I did buy the car used, and it has always felt quicker than any other GT I have driven so there may be other stuff done that I haven't noticed yet...It whines like a MOFO, everyone asks if it's blown, but I dunno what would cause that.

WHO KNOWS!? LOL