Twin turbo cobra hittin the streets.

[subyguy2006]

http://videos.streetfire.net/recentv...420016fe34.htm

I dont care if its a repost. Its a cool vid

[American Psycho]

eh........

[97talon]

Not bad.

[Soup]

did cobras come with a 5.4 ever?

[American Psycho]

2000 Cobra R ^

[500hpEVOIX]

Originally Posted by shaggy

2000 Cobra R ^

Isn't that the trition engine from the F-150s?

[Soup]

The 5.4 from the trucks is the same engine as the mustang from what I remember, just either bored or stroked out.

[Jason 306]

The 2000 Cobra R had the 5.4 with 4 valve heads, dual overhead cams, the 5.4 "triton" truck motors did not (SOHC 2-valve). That's sort of like a kitty to a lion...same species...very different. LOL. And I'm pretty sure that's the only mustang to come from the factory with a 5.4L overhead cam 'modular' motor, other than the new fatty Shelby .

And the 5.4 has the exact same size bores as the 4.6, just a longer stroke. 3.55 vs 4.1x or somewhere around there. The 5.4 also has a taller deck height for that extra stroke.

I can get much more specific if anyone would like

[B18BSol]

Originally Posted by Jason 306

The 2000 Cobra R had the 5.4 with 4 valve heads, dual overhead cams, the 5.4 "triton" truck motors did not (SOHC 2-valve). That's sort of like a kitty to a lion...same species...very different. LOL. And I'm pretty sure that's the only mustang to come from the factory with a 5.4L overhead cam 'modular' motor, other than the new fatty Shelby .

And the 5.4 has the exact same size bores as the 4.6, just a longer stroke. 3.55 vs 4.1x or somewhere around there. The 5.4 also has a taller deck height for that extra stroke.

I can get much more specific if anyone would like

What's the deal with the SVT Lightning motor, I heard that IS a cobra motor...or at least the block or something...

[American Psycho]

I think they just use the same eaton blower m112 ?

[Jason 306]

The 2nd Gen Lightnings used a 5.4L single overhead cam/2 valve head just like the regular F150 truck motors, although they received bottom end attention, different cam profiles, and maybe even some head work (not sure about that one) to accomondate the blower. As far as the blocks, the 4.6 and 5.4 are different (deck height), but since 1996 when they first found their way, I don't think there have been many changes. The Cobras did have an aluminum version until 2003 when they got blown . The 'modular' blocks are very, very strong....unlike my 5.0 block .

Edit: No mustang or cobra has ever came from the factory with a 2 valve 5.4L

[Q-("Q)]

Was a alright video.

[GracieFan]

Any turbo'd Cobra is an INSTANT hard-on 4 me....lots of work goes into 'e...got to give them credit ;-)

BW

[stevstum]

If you look closely at the pics in the video it has 4V valve covers. Also I have heard that you can get the Navigator heads, DOHC, and bolt them to a 4.6.

http://www.sullivanperformance.com/Y...tech/tech1.htm

Cylinder Heads

4.6L DOHC
There are several different castings available for the DOHC heads. 4.6L & 5.4L heads will physically interchange, but the ports on the 5.4L heads are much bigger than the 4.6L heads. Neither the Cobra or Lincoln intake manifolds will work with this swap. If you were able to get the intake to bolt on, there still is not enough material around the ports to enable port matching to the larger navigator heads. Our single plane 4.6L intakes were designed with enough material to allow for this swap. The Navigator heads ports are too big for a naturally aspirated 4.6L street car but may make for some impressive horsepower on forced induction cars.

These heads can be divided into 2 basic designs pre-1999 twin port heads (also known as the "B" head) and post-1999 tumble port heads (also known as the "C" head). These 2 heads are interchangeable on any of the 4.6L blocks although it is usually not financially feasible to do this swap because it entails swapping intake manifolds as well. Both heads are very good castings with the tumble port heads getting the nod for making more high end horsepower. The heads on the Lincoln are the same castings as are used on the Cobra.

If you are building your DOHC engine for use in a truck or heavy car, you will probably be happier with the twin port heads. These heads with their IMRC plates, create better torque and at a lower RPM than the tumble port heads without severely limiting hi-end horsepower. These heads respond well to a port and polish job. You can also pick up extra horsepower if your engine is a Lincoln, by swapping the intake manifold for an early Mustang Cobra intake.

The tumble port heads have been available since 1999. These heads were never offered on the Lincoln Mark series due to the cancellation of this model in 1998. These heads can be found on the front wheel drive Lincoln Continental. Maybe if you come across a cheap Continental engine it's not such a bad deal after all. Obviously these heads are also available on the Mustang Cobra. The Cobra heads were modified for 2003. They are supposed to flow better on the intake and exhaust than the early castings.
The best heads offered to date have never been installed on a production vehicle. These are available on the FR500 crate engine. The heads on the FR500 are available from FRPP under part #'s M-6049-T46 and M-6050-T46. These heads are bare, but FRPP does sell a hi-lift (12mm) camshaft kit that includes cams, valves, springs, retainers, and rockers under part # M-6550-T46. The heads sell for about 800.00 each and the cam kit is 1495.00


All of the tumble port heads respond well to a port and polish job. Unless you have money to burn, justifying the additional expense of the FR500 heads may be difficult. The standard heads can be made to provide all the flow necessary for even the highest horsepower applications.

5.4L DOHC
Twin port heads have never been offered for the 5.4L engines. You are limited to the Navigator heads unless you come across a set of Cobra R heads (you might have a better shot at hitting the lottery). Being limited to the Navigator heads is not a bad thing as these heads flow a large amount of air. Port and polish these heads and you will see port flow in excess 325 cfm. There is no horsepower to be gained by trying to run Cobra heads, the Navigator heads with their large ports allows the use of much larger intake runners. Below is an outline of the commonly available DOHC heads.

[bballboy2819]

cool vid...