ZZmustang

I wonder if it's possible to file a class action suit against ford for claiming 300 hp and every dyno I have seen says the GT has 260 or so. Isn’t this false advertising?

frdfrst

no not at all.its flywheel hp.

47Magic

Wow! I had to look up the number of your posts to be sure if you are serious... But with 900+ of them under your belt you were not aware of the difference?

+1 on the response above.

SonicBlue05GT

wow...

you're on a roll this morning, late night?[:-]

FenderParrothead

+ 1 All HP numbers you see advertised (on any car) is always the number at the flywheel.

ZZmustang

Yes I know there is a difference between flywheel and rear wheel. But no where does it say flywheel hp rated. There isn't a easy way to check flywheel hp. But even if that is the case , at 260 rear wheel hp on a dyno, I doubt that the trans and rear end use 40 hp. Especially on a stick.
Horse power ratings
http://www.hardtail.com/techtips/hpexplained.html

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Mikes_BLK_GT

15-20 percent parasitic loss depending on manual or auto the number varies but it would be 255 for a manual(300x 0.85) and 240 for an auto(300x0.80). Thats a just ageneral range on the parasitic loss but it's on the ballpark and is actually a little lower than you were thinking so maybe the loss isnt that bad afterall.

47Magic

Well, it is a known (obviously not as known as I thought) fact that every manufacturer posts engine hp numbers.
As far as how much HP you loose in between the flywheel and the rear tire, there is no need to loose sleep over it's acuracy. If dynos post RWHP in the mid 260s, it is just that; a mid 30s HP loss.
Ford or other renowned companies cannot lie about their engine output testing. I am not aware of how it is regulated, but there is some form of officiating within the industry.

D_Gusler

Well, if you figure a 15% drivetrain loss from a 300 hp starting point.
85% of 300 equals 255 rwhp. So I see nothing wrong with stock numbers around 260HP

tritonpwrd

They do say its a 300hp "engine". They test them off of the car, I'm guessing at the engine manufacturer. Thats with any car. Why would any automaker advertise wheel hp when engine hp is always a bigger number? It makes it look better for the consumer. They have always done this sinse day 1. Its nothing new.