how does the fox 5.0 compare to the 99+ 4.6 ?

nmcgrawj said:

Can the DOHC swap with SOHC cars be looked at like 351w swaps in place of a 302? Or is it more like the 351w swap is like a 5.4 SOHC swapped with a 4.6 SOHC?

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Good question, I do not know what the 5.4L put down so I couldn't provide an idea...maybe one of the others will have a better englightment that I.

I do know (as I have told you) that the 99+ SOHC and the 96-98 Cobra are very close in performance. The Cobra traps about 1-2 mph faster, MAYBE 2...

305 hp DOHC vs. a 260 hp SOHC is pretty close. I think it's narrow powerband and similar/same weight help it out.

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Anyone ever compared a stock geared 5.0L vs. a stock geared 4.6L. Suprisingly, the 'torque' difference isn't much at all Most people that are doing these 'get in and get out' comparisons are used to a geared 5.0L. I know on the peak numbers, the 4.6L makes the same torque 100 rpm higher...than the 5.0L.

Like I say, 20 mph plus and the 4.6L will win...0-20 mph, maybe not.

The 96-98 SOHC run right with a stock 5.0L but we say the 4.6L is weak. Hmm...

nmcgrawj said:

Can the DOHC swap with SOHC cars be looked at like 351w swaps in place of a 302? Or is it more like the 351w swap is like a 5.4 SOHC swapped with a 4.6 SOHC?

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Uhh...sure? lol

Seriously though...one of the local stang guys swapped a navigator 5.4 dohc into his Saleen with some upgraded rod's & pistons. He proceeded to throw on a twin turbo kit and ran nines at almost 150 mph spinning down half the track. That damn car looked and sounded stock...even when he was driving around town.

I wasnt asking in terms of power, i was asking in terms of ease of swap. How much u have to change, what parts can be used, computer, heads, headers, etc.

If I ever take the 2v plunge I want it to growl just like this one.

http://www.youtube.com/watch?v=YB53GQoUmmo&mode=related&search=

Mustang5L5 said:

I beleive the Teksid block in the 93-98 Mark 8's and 96-98 Cobras is the strongest 4.6L block. It will handle up to 1000HP.


That would be the block to base a 4.6L stroker motor on.



The regular iron GT block can handle up to 500HP. The internals can't though and must be upgraded

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any modular block ( block itself not internals ) can handle upwards of 1000hp! It is an all around better block PERIOD. Whether it be a teskid block or a iron block out of a 96 gt.....they all are VERY stout! They are very similar to an FE motor as far as the bottom of the block is concerned!

ill advised said:

If I ever take the 2v plunge I want it to growl just like this one.

http://www.youtube.com/watch?v=YB53GQoUmmo&mode=related&search=

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got damn!

That video is one reason I love 4.6s, they sound so damn mean!!!

That and a bolt on DOHC motor will make a lot more power than a bolt on 5.0, get the mileage, and run hard. Think of what a 96-98 Cobra can do on bolt ons, tires, and a gear, or a Mach. Now think of that driveline in a lighter car... thats what I want, and then a gear swap, T56 and a turbo set up!

How hard to swap into a fox? Does all the wiring have to be addressed or just the engine wiring? I assume they sell motor mounts for the swap, as well as tranny crossmembers...

Mustang5L5 said:

It's because of the Torque. There is a 45HP difference, but the peak TQ levels of both cars is pretty much identical. The reason the GT can hang with a stock 96-98 Cobra though is because it's torque comes on at a lower RPM than that year DOHC motor.

HP tends to get you moving in the upper RPMS, and the DOHC makes more because of those 4 valves, so top end, the 4V would start pulling away from the 2V with the better breathing heads.

4V's also respond better to mods because of the same fact.

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That is what I was getting at, you do not need to rev it high to get it moving, therefore the SOHC narrower powerband (torque as you say) gets it moving quicker (comes on at a lower rpm as you say).

I agree.

Mustang5L5 said:

The swap is very easy. The modular line of engines is called that becase parts are interchangable between them.

The 4.6L SOHC and DOHC are virtually the same engines, and the 5.4L is just a bored version of that. The 6.8L V10 is a 5.4L with 2 more cylinders tacked on.

Engine swaps are very easy for this reason. DOHC swaps are common, and 5.4L DOHC are even better. They aren't usually done though because the engine is heavier like a 351 would be.

There are a few 6.8L v10 Mustangs out there as well

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I thought it had more stroke

3.552" bore, with a 3.543" stroke for the 4.6L

3.552" bore, with a 4.165" stroke for the 5.4L

727rwhp stock block, just a current ongoing thread...many have gotten more power...

http://forums.modulardepot.com/4-6l-2v-tech/104512-727-rear-wheel-horsepower.html

Some more information about blocks and interchangeability:

Mustangs have come with both Romeo and Windsor engines. The 1996 thru 1998 Mustangs came with Romeo based engines. The 1999 thru 2000 Mustangs came with Windsor engines. Then just for fun, Ford went back to Romeo engines in the 2001 thru 2004 Mustangs. Be sure to check the engine no matter what year it is. It seems that Ford carried over some engines into the following model year.

4.6L DOHC engines have come with blocks cast in both iron and aluminum. You can find the aluminum blocks in Mustang Cobra's up to year 2001, Lincoln Continental, Lincoln Mark Series and the Lincoln Aviator. These blocks are cast by Teksid in Italy for Ford. All of the aluminum engines are assembled at the Romeo plant. No SOHC engines have ever been cast in aluminum, although the blocks are generally interchangeable between the DOHC and SOHC. The only exception to this is the Continental engine which is front wheel drive. This block will not work in rear wheel drive vehicles. One of the motor mounts is not drilled, the bell housing is different to allow mating up to the transaxel, the oil filter is located on the opposite side of the block, the front cover and accessories are different. The oil pan has a front sump so this may help with some swaps that require a front sump. If you get stuck with one of these engines, you can still use all of the internal parts, cylinder heads and intake. These parts will bolt up to an iron or aluminum rear wheel drive block. Be sure to evaluate the time and expense associated with this kind of swap, all of the necessary parts needed to complete this conversion will add up quick.

The Lincoln Mark series are probably the most popular 4.6L DOHC engines, due to the relatively low
price compared to the Cobra engines. What are the differences between these two engine's? Following
are some, but not all of the differences.

The Cobra comes with a forged steel crank using 8 flywheel bolts, the Lincoln comes with a nodular cast iron crank with 6 flywheel bolts.
The Lincoln uses a different oil pan with a reservoir on the side.
The oil filter/water outlet castings are different.
The Intake cams on the Lincoln are a slightly different profile.
The Intake on the Lincoln is different from the one used on the Cobra, although they do use the same cylinder heads and a Cobra intake will bolt on.

The 6.8L V-10 has never been cast in aluminum except for a limited number that Ford did for a Mustang concept vehicle. The 5.4L DOHC has been cast aluminum but has, up to now, only been available in the supercharged GT40. We will have to wait and see if Ford offers this block through it's performance parts division. Just a guess, but you probably won't find many of these at your local pick-a-part yards.

4.6L SOHC - 500 lbs.
5.4L SOHC - 525 lbs
4.6L DOHC Aluminum Block - 425 lbs
5.4L DOHC - 540 lbs
6.8L SOHC V-10 -640 lbs