GT Factory HP

[98blackmagic]

I wanted to see if anybody else ever noticed this, I just did last night. The 99-04 GT PI cars are rated from the factory at 260hp, but if you look at all the mustang mags they allways get around 215 at the wheels for a automatic and 230 or a hair more for the 5 speeds. In the april 2004 issue of Muscle mustang and FF they compared the GT, March1, and cobra ( this is what I was looking at when I realised this) they dynoed the GT and got 214hp and 265lb of torque, now with a 23% loss thru the automatic that would put it at 280hp not the 260 ford rates them at. If you look thru the mags for the articles the stock 5 speed cars usually make around 230, and with a 15% loss this would be around 280 also. It is a known fact that the cobra's were underrated from the factory, so am I doing something wrong on my calculator or are the GT's a little underrated too?

 

[Dusstbuster]

Im not quite sure on this but i know lots of times i though companies underrated their cars for insurance purposes. Less powe = less insurance = better.

 

[Kilgore Trout]

My GT is bone stock and it dynos at 301RWHP

 

[jasonh_86]

so the factory actually underrates the hp on their cars? or is it just the mustangs? or all sports cars? or all cars or what?

Sorry for the idiotic questions, i'm just confused

 

[98blackmagic]

I think you hit the wrong key,3 insted of 2

 

[98blackmagic]

I have seen info before where automakers underrate cars for insurance reasons but everyone knows mustangs are already on top of the symbol rating for insurance co. they are already draing our pockets so why would ford underrate the GT

 

[Kilgore Trout]

I think you hit the wrong key,3 insted of 2

Um, NO! Not the wrong key I did lie slightly though. It is not completely stock I do have a turbonator up in there.

 

[98blackmagic]

Whould that be a single or a twin?

 

[Kilgore Trout]

Speak not of the cumulative effect of running turbonators in series! If the ricers learn of this we are done for

 

[flames201]

Um, NO! Not the wrong key I did lie slightly though. It is not completely stock I do have a turbonator up in there.

are those turbo's or just 1 turbo. we just had a dyno day ,and out of 13 99-04 gt's with some small mods; none were at 300 rwhp!

 

[hauoli63]

My GT is bone stock and it dynos at 301RWHP

Geez ... I got ripped off then!! I want your car!!

 

[98blackmagic]

DOWN WITH THE RICER'S

seriously I was wondering about this because I'm doing the PI swap over the summer and was trying to get a idea of where my rwhp would be with my bolt-on parts I have on my motor now. If the PI autos make 215 I think I would be around 260-270 with my parts after re-tuning my chip. I've got 238 now

 

[wms004]

My GT is bone stock and it dynos at 301RWHP

Hahaha. was that at the Disneyland dyno?.. Either that or ford played a nice trick on you.

 

[98blackmagic]

has anyone dynoed thier car STOCK and have the numbers

 

[YardSpecial]

Dyno's lie there azzez off. Get a base line and tune from the SAME base line dyno.

Track times are a better for true HP numbers.

I doubt the 4.6 PI makes more then the rated 260 HP.

 

[02GTKB]

My GT is bone stock and it dynos at 301RWHP

 

[twogts4us]

Dyno's lie there azzez off. Get a base line and tune from the SAME base line dyno.

Track times are a better for true HP numbers.

I doubt the 4.6 PI makes more then the rated 260 HP.

Somebody finally making some f'ing sense...excellent post, Cavallo - tell 'em like it is. I love these people who think they have a "factory freak" - no, what you have is a "friendly dyno operator".


And for the rest of you - Kilgore is jerking your throttle cable...

 

[Kilgore Trout]

Its true, I lied... Sorry... Would have been more approriate for a talk thread

 

[Blown00GTAuto]

...I doubt the 4.6 PI makes more then the rated 260 HP.

There is some variance between 2v GT's but it's not that much. Way back when, my tuner estimated mine to be 270 flywheel hp completely stock because it was a bit stronger than the average. As far as autos, the loss is 20-23%.

It takes high flowing heads/cams and exhaust to get 300+ wheel hp on a 2v N/A GT.

From all I've seen over the years, Ford's rating of the 2v GT's is pretty much on target. On the other hand, cars such as the 03+ Cobra appear underrated if you do the math.

 

[HoustonGT]

I think GT's are pretty dead on but 03/04 Cobras are DEFINATELY underrated