[08DarkCandyGT]

Looks like the '10 GT 500 is under rated. Putting down 511 HP at the wheels. Check out the article and video.

http://blogs.edmunds.com/straightlin....photopanel..1

[ITLRUN]

511HP at the rear wheels, you could call it under rated. According to my calculations, when they said north of 570 HP how about 601HP at the crank. There's a formula most tuners use, and that's say the 511 RWHP and divide it by .85 = 601.176HP at the crank. If you already know what the power is at the crank, take the .85 and multiply by 601.176 = 510.999 round it out and you have your 511 RWHP. Not bad FORD, finally putting things back to where they use to be, Mike. SCT Tuner.

[shifter87]

I dont know what you getting at nice equation but it's 540 at the crank not 600.

[Rolling_Thunder]

Originally Posted by shifter87

I dont know what you getting at nice equation but it's 540 at the crank not 600.

540 is what ford states as HP to the Crank. Doesnt mean thats what it is just what they state!Most of the Car companies did this in the 70's to keep rates down. Maybe 600hp puts it at a higher Insurance rate. But like ITLRUN said 511 RWHP would calculate out to 601 at the crank!

[Gashog]

He's saying that it's underrated.

Making more power than it's advertised to have.

[Crazystang89]

Very nice. That could be a ringer though. The 540 rating has to cover even the weakest enginethey build to, so there are always going to be some strong ones.

[Andywalls]

oh yea Ford is back with some attitude =)

[RetroGT2006]

Originally Posted by ITLRUN

511HP at the rear wheels, you could call it under rated. According to my calculations, when they said north of 570 HP how about 601HP at the crank. There's a formula most tuners use, and that's say the 511 RWHP and divide it by .85 = 601.176HP at the crank. If you already know what the power is at the crank, take the .85 and multiply by 601.176 = 510.999 round it out and you have your 511 RWHP. Not bad FORD, finally putting things back to where they use to be, Mike. SCT Tuner.

Dang that really did underrate it!! Man they are quite smart, i would kill for this car!! Amazing numbers!!

FORD FTW baby!

Too bad our 05-09 GT's weren't underrated to a nice 300rwhp lol..

[Gary Paul]

Originally Posted by 08DarkCandyGT

Looks like the '10 GT 500 is under rated. Putting down 511 HP at the wheels.

The motor is the same as the '07-'09 GT500s except for the FRPP CAI and re-tune (same as the GT500KR). I've already added the FRPP CAI and tune to my '08 GT500.

The July 2009 issue of MM&FF has an article about adding headers to an '07-'09 GT500. The stock GT500 motor performed very well:

HEADER TEST: STOCK GT500 MOTOR (from page 148 sidebar)
We pulled a stock GT500 motor out of a car, installed it on the engine dyno and ran the exact same series of tests (that they had previously run on a modified 5.4L motor). With the stock Eaton supercharger run with the stock pulleys and stock exhaust manifolds, the stock supercharged 5.4L produced 594hp and 559 lb-ft. After running the stock supercharger, we installed the Kenne Bell 2.8L H-series Twin Screw supercharger. Equipped with the stock exhaust manifolds, the Kenne Bell equipped 5.4L produced 719hp and 615 lb-ft.

They also tested both combinations with 1-3/4" diameter, 1-7/8"diameter and 2" diameter long tube headers. The long tubes only added 10 to 11 hp and 12 to 13 lb-ft on the stock motor. With the Kenne Bell, the 1-3/4" headers added 16 hp and 21 lb-ft and the larger headers a bit more. The conclusion was that the stock manifolds were not too restrictive for the stock blower. The headers help more on a modified 5.4L engine.

[CrzyHorse]

Originally Posted by Gary Paul

The motor is the same as the '07-'09 GT500s except for the FRPP CAI and re-tune (same as the GT500KR). I've already added the FRPP CAI and tune to my '08 GT500.

The July 2009 issue of MM&FF has an article about adding headers to an '07-'09 GT500. The stock GT500 motor performed very well:

HEADER TEST: STOCK GT500 MOTOR (from page 148 sidebar)
We pulled a stock GT500 motor out of a car, installed it on the engine dyno and ran the exact same series of tests (that they had previously run on a modified 5.4L motor). With the stock Eaton supercharger run with the stock pulleys and stock exhaust manifolds, the stock supercharged 5.4L produced 594hp and 559 lb-ft. After running the stock supercharger, we installed the Kenne Bell 2.8L H-series Twin Screw supercharger. Equipped with the stock exhaust manifolds, the Kenne Bell equipped 5.4L produced 719hp and 615 lb-ft.

They also tested both combinations with 1-3/4" diameter, 1-7/8"diameter and 2" diameter long tube headers. The long tubes only added 10 to 11 hp and 12 to 13 lb-ft on the stock motor. With the Kenne Bell, the 1-3/4" headers added 16 hp and 21 lb-ft and the larger headers a bit more. The conclusion was that the stock manifolds were not too restrictive for the stock blower. The headers help more on a modified 5.4L engine.

With the stock supercharger and pulleys they made 594 hp? What? Am I reading that wrong cuz I would love to make that number...

[travelers]

As usual Ford under rated a motor. Have they done that in the past????

[Nascort]

Originally Posted by 08DarkCandyGT

Looks like the '10 GT 500 is under rated. Putting down 511 HP at the wheels. Check out the article and video.

http://blogs.edmunds.com/straightlin....photopanel..1

Those are some serious numbers!!!

Originally Posted by Gary Paul

The motor is the same as the '07-'09 GT500s except for the FRPP CAI and re-tune (same as the GT500KR). I've already added the FRPP CAI and tune to my '08 GT500.

Doesn't the 07-09 put out 440-450 rwhp? Seems like the tune on the 10' is pretty aggressive or there is something else under the hood.