Great post right here, and with the prices of early GT500's dropping and a lot of them having low miles the choice isn't so clear.
i would still take a de-striped gt500 with the svtp package. Just for the fact that the 5.4 is a much better tested motor. Now my mind might be changed in 2 years when there are 5.0's running around with 600+hp over 30,000 miles.
The GT500 has forged rods and low compression. How long will the 5.0 last with a substantial amount of boost and a lot of competitive driving. I'm wondering since they put the forged crank in the 5.0 why didn't they put a good set of rods also?
The 5.4 has, I think, 8.3:1 and the Coyote I know for sure is 11:1. But you figure the 2+ additional points compression, higher RPM, 5.4L redline is like 6300 and the 5.0L is 7,000, plus the Ti-VCT, better flowing heads and some of the best factory exhaust manifolds ever put on a car and it's not very surprising that the 5.0L can out HP the 5.4L under boost.
The 5.0L has too much technology for a 400cc difference to account for under boost. People always say there's no replacement for displacement, but when you're talking about such a small difference in cubic inches, I'm not surprised at all the 5.0L would be on top at the same boost levels.
I think the Coyote motor will stand up very well to 9psi. Just reading the articles out there about what the Ford engineer's had to say about how they designed the block and heads will tell you that. Also, FRPP wouldn't sell a 675hp, 9psi kit if it were going to frag a motor in less than 30,000-40,000 miles.
Not sure I'm on the same page here, but when I bought my 03 Cobra there was a serious gas guzzler charge included with the sticker price.Before too long the emissions certification for the 5.4 4V GT500 engine will expire and I doubt Ford will spend the money to re-certify the engine for one limited production car.
same here.Im not suprised either, i saw this coming.
The GT500 has forged rods and low compression. How long will the 5.0 last with a substantial amount of boost and a lot of competitive driving. I'm wondering since they put the forged crank in the 5.0 why didn't they put a good set of rods also?
this is somewhat misleading.The rods along with the crank are forged. But the pistons are cast alluminum.
http://www.mustang50magazine.com/fe...8_2011_ford_mustang_specifications/index.html
Not sure I'm on the same page here, but when I bought my 03 Cobra there was a serious gas guzzler charge included with the sticker price.
It's amazing after all these years of watching cars become more advanced gas just keeps climbing, even as the baby boomers are getting old, dying off, and driving less. Maybe a reverse strategy is the answer, Big Blocks.One word...
C.A.F.E.
Corporate average fuel economy. For the foreseeable future, much like the early 80's, we will have CAFE requirements driving a lot of production decisions.
this is somewhat misleading.
the rods are NOT forged steel. they are a powdered metal FORGING...the root word "forge" is what throws people off.
Bingo, the rods are the only weak link in the 5.4 S/C...but they will make 800 rwhp on stock internals. The Ford GT 5.4 will make 1000 rwhp with the stock fuel system and the only changes being swapping the blower for an intake and bolting on twin turbos. Get rid of the PMR's and pretty much the sky is the limit with the 5.4 you can make as much power as you want within the streetable limits.