It's pretty much just a bored 4.6 with 4v DOHC heads

 

Man, a tough choice, but I'd say the 3v SOHC 4.6 is the better of the two since it makes the most of what its got. Definitly a case where less is more.

 

I think I may take back my original assesment . . .in the September 2005 Road & Track (which reminds me of why I love R&T) they have a Vortech 2005 Mustang GT (that REALLY holds its own) with 16psi . . . . and it's made over 150 dyno pulls and puts down 575 RWHP!!!

No way a Stock Mach could take 16psi on 150+ dyno runs plus drving/testing . . . .

 

Did Vortech replace engine internals?

 

According to the article, yes it did. There is a thread in the '05 section that argues against that fact, but I think it was deemed true in the end.

 

I would have to go with the the 05 3v.

SOHC so the heads weigh a lot less. Variable valve timing. 87 octane rating with lower compression ratio.

 

Both are the same short block no? Aluminum.

Yup Cammer is bored 4mm. If you stroke instead, you get a 5.4L Triton (f150), but you need a cast iron 03-04 Cobra/GT-type block for that. However it gets the exact heads of the 05 GT.

Or, take our aluminum 05 GT/Mach 1 short block and combine with Mach 1/Cobra DOHC heads, and keep the long 5.4L stroke, and voila, you have a Navigator engine. Switch back to cast and you have a 2007 Cobra.

I really love the 4.6/5.4 block, very versatile. Amazing the types of drivetrain you can have based on 2 blocks and 2 heads.

If you guys wanna read more, check here:

http://en.wikipedia.org/wiki/Ford_Modular_engine
http://en.wikipedia.org/wiki/Ford_Triton_engine

-C

PS Ford!! Pick a 4.6 combo for the Ford 500.

 

That's odd, the Mach1 engine pictured would appear to be an 04 because it's Competition Orange. However, the valve covers are black, like an '03 Mach1. The valve covers on the '04's were unpainted, like the '05's. :-)

 

Maybe Ford had some 03 valve covers left over?

 

I don't know what year the Mach was...I just took it from images.google.com as reference for looks compared to an '05's engine bay.

The dyno chart came from a tuner that owns a Mach.

 

while we're talking about valve covers, i think the ones on the mach look better :P

this is a "which is better" thread right?

 

What I like about the mach1 motor is the forged crank on the 5-speed models.

 

I would say as far as the heads go, for every day type driving, I would go with the three valve heads, striclty track with a power adder, the mach heads.

 

Congrats to Ford for the three valve technology,but for wow factor the 4 valve takes the cake.They look particularly cool under the hood of my Marauder! www.1969boss429.com

 

Actually, it's not Competition Orange. It's a very washed out picture of an 03 Torch Red Mach 1. I have plenty of pictures of my Mach 1 taken with a cheapo digital camera where it appears to be orange, just like that picture you posted.

 

I can't say for sure either way cause I've never been in a new GT but the 4v DOHC in the Mach at least is great for every day driving, decent off the line with the 3.55s like the new GTs and the midrange is to die for. Perfect for stoplight encounters.

 

2005 Mustang GT Avg
HP TQ
268 285


03-04 Mach 1 Avg
HP TQ
272 293

Taken from different stock dynos on forums dealing with both cars.

What is the avg for a 93 octane tuned Mach and a 93 octane tuned GT I wonder.

You also have the large difference in wheel diameter which would affect the final power #s.

 

I'm willing to bet it'd be close if not in the favor in the GT since benefit pretty well from a tune at least from what I've seen on the boards, but the 32 DOHC can be tuned even more as well even though it has a premium fuel tune from the factory. IIRC CAI, exhaust and tune gets you pretty close the 300 rwhp if not more with a Mach 1, I think the GT might be pretty close to that as well, I'm not sure though.

 

Mod for Mod I think they'd stay pretty much the same but I would bet that the Mach would gain more from the exhaust, but I am basing that off of hearsay.

 

Mach 1