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Dyno stock numbers GT 500?

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Old 08-25-2007, 05:49 PM
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davemurray
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Default Dyno stock numbers GT 500?

Is it right 384 rwhp for a Stock 2007 Shelby GT500?
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Old 08-25-2007, 06:06 PM
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mills281e
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Default RE: Dyno stock numbers GT 500?

Should be more like 425 rwhp....
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Old 08-25-2007, 06:27 PM
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07_427R
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Default RE: Dyno stock numbers GT 500?

ORIGINAL: mills281e

Should be more like 425 rwhp....
Agreed! Thats in the neighborhood of all the numbers I've seen!!
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Old 08-25-2007, 06:27 PM
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davemurray
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Default RE: Dyno stock numbers GT 500?

A friend of mine has one and we were surprised.
We were specting 440HP.
What could be wrong?
We should take it to the dealer?
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Old 08-25-2007, 06:53 PM
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mills281e
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Default RE: Dyno stock numbers GT 500?

Better find out if dynoing it voids the warranty at the Ford Dealership you're taking it to.....don't know what etiquette is on that policy.

What kind of dyno was it (Dynojet, Mustang dyno, etc...) and what was the weather/other conditions? Some of that may explain it.....but your friend is missing quite a bit of HP[:@].
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Old 08-25-2007, 07:25 PM
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davemurray
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Default RE: Dyno stock numbers GT 500?

ORIGINAL: mills281e

Better find out if dynoing it voids the warranty at the Ford Dealership you're taking it to.....don't know what etiquette is on that policy.

What kind of dyno was it (Dynojet, Mustang dyno, etc...) and what was the weather/other conditions? Some of that may explain it.....but your friend is missing quite a bit of HP[:@].
It was a Dynojet, my friend has all the charts with all the numbers.
The Dyno owner is very known locally and he has never had any problems. Even he said the car is at least 40hp underpowered. The car has roughly 2,500 miles on it.

Thanks for the replies and any other advice would be greatly appreciated.
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Old 08-25-2007, 07:53 PM
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smoothy
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Default RE: Dyno stock numbers GT 500?

I'd be very surprised if the car was underpowered from factory, every GT500 engine is run on an engine dyno before being installed. 500hp at the crank -15% drivetrain loss = 425hp. If he pulled 384, was that an adjusted number for temp/humidity? Assuming the dyno was set up correctly, hopefully it'll be something easy to find/fix, like a ham sandwich left in the differential or poorly greased driveshaft fittings. Good luck getting Ford to do anything about it though (unless you find a mechanical problem) they will look up the engine dyno record to confirm it ran at least 500hp and then tell you too bad so sad.
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Old 08-25-2007, 10:07 PM
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S281 E
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Default RE: Dyno stock numbers GT 500?

All the GT500 I've seen have come in at 425-435RWHP.
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Old 08-25-2007, 11:48 PM
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Default RE: Dyno stock numbers GT 500?

My friend just hit 802rwhp on his today! Those engines are incredible.
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Old 08-26-2007, 08:50 AM
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Default RE: Dyno stock numbers GT 500?


ORIGINAL: smoothy

I'd be very surprised if the car was underpowered from factory, every GT500 engine is run on an engine dyno before being installed. 500hp at the crank -15% drivetrain loss = 425hp. If he pulled 384, was that an adjusted number for temp/humidity? Assuming the dyno was set up correctly, hopefully it'll be something easy to find/fix, like a ham sandwich left in the differential or poorly greased driveshaft fittings. Good luck getting Ford to do anything about it though (unless you find a mechanical problem) they will look up the engine dyno record to confirm it ran at least 500hp and then tell you too bad so sad.
LOVE THAT!

See, we really do need a Homer Simpson "DOH!" smiley....
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