is that 1 or valves?

in any event, they make more power than the LT1 stock with 20% less displacement . and like i said, under 5lbs of boost they make make an additional 100hp. they also have that stupid, i want to call a paper cat, in the intake duct crunching it for 5-10hp. motor i saw dynoed 309hp i think. 315hp out of a 4.6 liter...not too shabby.

the DOHC 4.6 are where its at though. my understanding is people go pretty damn fast on stock castings in those things

 

Still go back 10 years look at the first Northstar. Smoother, more power, more TQ, same cubes. 320hp in the XLR version.

A LT1 gets about the same RWHP as a '05 GT with less TQ. Once you get in the car HP per L means squat.

The cranks in those 4.6L's leave a lot to be desired as well they snap like twigs were a LT1 crank is pretty dam tough and essentially a 50 year old design.

Maybe I'm just bitter because we don't have F-bodies anymore and the Ford pony car doesn't come close to living up to the concept car appeal. Well that and a bunch of drag racing series and organizations to race Mustangs and we have close to nothing.

Bret

 

The Cobra's run 12psi. Not 5. I'd be ashamed of myself if I was only making 400hp with 12psi. In the end, the only thing Mustang guys can argue is "horsepower per liter" or some other nonsense like that. From the factory - they have trouble keeping up with a 10 year old f-body. If we're going to talk about modifying Mustangs vs. Camaro's & Firebirds - it boils down to this: if you have enough money, you can make any motor do anything you want.

 

1. last i heard they run 8, stock.

2. i'm not talking about a cobra, they are not blown GTs. thye are 6spd manual IRS DOHC 4V blown forged motors with reduced compression. a GT is none of those.

3. mustangs have a lot of advantages on camaros and vice versa. they both suck. pick your poison


4. mutang guys, at the end of the day they have a factory supercharged car. infact take "factory supercharged" out of there and they still have us beat

 

bret. i'm not comparing mustang vs camaro. i'm just stating their heads make power.

 

I stand corrected.

 

I know they can make power, throw enough boost at something and it can make stupid power.

Hell a 2.2L Ecotec can make 975-1000hp with 30psi!

I have nothing against Fords, hell the 302 motor is a great drag motor (with Victor heads and a Dart Block) but I still can't get that GM out of my head.

Bret

 

my point was they flow air well in order to make 300hp on a 4.6L and +400hp under 5lbs of boost

Im not a ford fan, at all. Just dont tell that to the guys at work concidering our racecars are ford based

 

Forgive my ignorance of Ford products, but I am slightly confused: Are the 4-valve heads on the modular 4.6L interchangable with the 5.4L motor used in the Lightning & the GT40? My guess would be no. Is the block the same (i.e., small differences like those between LS1 & LS2 - bore size, sensor location, etc.) or radically different?

It is also my understanding that the modular 4.6L block accomodates 2-valve, single overhead cam heads (older Mustang GT's); the 4-valve Cobra heads; and now, the 3-valve heads on the 05 Mustangs. Yes?

 

the only thing i am fairly certain of is 4.6 4V to 5.4 4V are interchangeable... i think. i might even be wrong about taht the more i think

 

I'm not sure on the 3-valve stuff, but the 4.6 will accept both 2-valve and 4 valve heads. The only difference between the GT and the Cobra Blocks (2-valve vs. 4-valve) is the main caps. The GT has 2-bolt mains, whereas the Cobra has 6-bolt mains.

 

does ford use an alum block in the NA cobra suff/mach 1 stuff

 

Yes, all the Mustangs run aluminum blocks except for the 03-04 Cobras.

 

mustangs!? or cobras?

 

Cobras are Mustangs!


Yeah, all Cobra's, Mustang GT's, and Mach 1's had aluminum blocks except the 03-04 Cobra's.