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Topic Review (Newest First)
10-23-2003 05:37 PM
cobra 28 I am not sure about a 2000 cobra but my 2003 cobra uses a dual intake fuel pump set up and it is a returnless system. You can not use your stock 86 fuel bump because it pushes to much pressure without a way to return it. The new system bypasses the fuel in the tank instead of going all the way to the motor and then bypassing all the way back to the tank. Hope that helps
10-23-2003 04:28 PM
2wld4u And to the guy that said a 199x - 200x Mustang can't handle a 5.4, They're wrong. Theres an issure of HOTROD magazine as well as the 1994 10L Boss Produced by SVT Team *only 10 in the world exsist*, (In which theres a 429 CID Engine) in each Mustang.. Check out
http://www.svt.ford.com/flash/index.html
go to concept cars and check out the 10L boss... They did that without cutting and it fits right in, nothing needed to be moved around...


I didnt say it wouldnt fit, the 5.4's just look too tall, It seemed to me that a factory mustang would have to have a cowl hood or a hood scoop, and now that I think about it, MMFF did this swap, Frightning i think, where they put a blown 5.4 in a 86? out of a lightning, and I believe they had a 4" cowl hool and had to chop it so the hood would shut..I also believe they used a C-4 behind it, I cant remember all the details, but standing beside a 5.4 youd think the same I did..
10-23-2003 04:22 PM
dmorris1200 pic 2
10-23-2003 04:20 PM
dmorris1200 pic 1
10-23-2003 04:19 PM
dmorris1200 Ford did not use a returnless fuel system in the older 5.0 Mustangs. They use a pressure regulator at the end of the fuel rail and a return line after that to return excess fuel back to the tank. They also had two different set-ups. One used just a high pressure in-tank pump and the other used a low pressure in-tank pump with a high pressure external pump mounted along the frame in the pressure line before the fuel pump. Both systems used a return line back to the fuel tank. See attached pictures of fuel pumps.




10-23-2003 10:09 AM
G-unit gt hummm?????? the first fuel injected mustang came out in 1986,i own one,and it dose have return fuel lines,need to know if your friend is usen the 86 ecu,if so ,this is his problem you need to use the ecu for correct for that spasiffic engine..
10-23-2003 06:21 AM
Smoked Rubber Mustangs from 1979 - 1995 Used a 5.0 L block, Which was Basically a 302 Windsor Block that was available back in 1968 Mustangs.

(In 1979 They added 5.0 To make it look more appealing.)
So truthfully 1968 - 1995 Marks the Exsistance of the 5.0 (302 W) Block in publically available Mustangs.

Fuel Injection started in 1985 for The Ford Mustang. The 5.0 Does have a Fuel line that goes straight into the engine (No return lines) In 1996 Ford Switched to a Smaller 4.6 L (281 CID) Block... The 2000 COBRA "R" MODEL (Notice the R at the end) used a 333 CID 5.4 L Cast Iron Windsor Block. (This is the same block used in the Current Ford SVT F150)

And to the guy that said a 199x - 200x Mustang can't handle a 5.4, They're wrong. Theres an issure of HOTROD magazine as well as the 1994 10L Boss Produced by SVT Team *only 10 in the world exsist*, (In which theres a 429 CID Engine) in each Mustang.. Check out
http://www.svt.ford.com/flash/index.html
go to concept cars and check out the 10L boss... They did that without cutting and it fits right in, nothing needed to be moved around...

To the guy that started this trend, from my understanding your going to have to switch fuel pumps and fuel rails, the 4.6 Block that came from the 2000 COBRA (Notice its just cobra and not COBRA R) needs a return fuel line, it wasent made to burn the Excessive fuel that the 5.0 Needed. The Injectors would also have to be switched (Use the Injectors from the 4.6 with the 4.6, Because the 5.0 Used Higher Lb/Hr. Injectors then that of the 4.6)

I personally think it would be easier to swap a fuel tank from a 4.6 onto your 80's Mustang and swap the blocks, and that should settle all the Major problems you would experience... (You will also need to get your hands on a 4.6 ECU..)

If theres anything else Just reply here and hopefully I can keep up on this thread.

Mustangs are my Favorite car, Love em to death, I currently co-own a 1997 and am looking to buy a 94 - 95 GT for myself (Last years of the 5.0) Good luck and I hope this Helped others as well.
__________________________________________________
When I re-read your post I think you got the Engines mixed up man..

The 4.6 281 CID (used in the 2000 Cobra) uses a Fuel Return Line

The 5.0 302 CID (Used in your Friends 86 Mustang GT/LX, Etc.) Uses a Straight Line that fed into the engine and had NO FUEL RETURN line

Then theres a 2000 Cobra "R" which uses a 5.4 333 CID Engine, From what I recollect this as well diden't use a Fuel Return line.

I doubt you got your hands on a 2000 Cobra "R" because theres only 300 of those in the world and the selling price on one was marked at $54,000+ The Engine could have been ordered After market but You said your friend got The block out of a 2000 Cobra...

So that leads me to beleave you have your hands on a 2000 Cobra 4.6L (281) Block, and your friends origional 5.0 (302 W) blocks.

Remember as I said earlier, the 4.6 HAS and NEEDS the fuel return line to keep it from running RICH.

The 5.0 uses a NON Return line system (The Fuel pumps into the engine and stays there).

Thats why when you put the 86 5.0 Fuel rail on the 2000 4.6 Block The Engine ran RICH as hell, because it diden't have the Return fuel line the 4.6 Block NEEDS, to bleed off the un-needed fuel it was getting.

You might also want to check your FPR (Fuel pressure regulator) and make sure its not Set at a High pressure, or else your defeating yourself there as well....
10-22-2003 09:16 PM
87442lover Yeah but those cobra "R" s are cars that we will probably not see. And why is the 2000 Cobra R only putting out high 300's on HP and torque? My friends 98 cobra with a 144 on a 4.6 at 5-8psi puts out 400HP/380ft lbs. ?? With those numbers I would think the new cobra is supercharged, but they are still kinda low.
10-22-2003 08:54 PM
2wld4u I stand corrected, I have delt with the 5.4's and they seem to be a little to tall for a mustang, but thats what the site said, Hmm, Id like to try that swap...
10-22-2003 08:39 PM
mstngjoe
Quote:
Originally posted by 2wld4u
there wasnt a 5.4 in a cobra, its too tall, it would have to have a 3" cowl from factory N/a and a 4" cowl wouldnt clear the supercharged version, there was however a 5.4 lightning and it was supercharged...
The 1995 Cobra "R" along with the 2000 Cobra "R" had larger displacement engines than the standard Cobra.

The 351W (5.8) in '95 and the 5.4 (330 cid) in '00.

Check out the info here:

http://www.svtregistry.com/cobra-r/
10-22-2003 08:09 PM
2wld4u there wasnt a 5.4 in a cobra, its too tall, it would have to have a 3" cowl from factory N/a and a 4" cowl wouldnt clear the supercharged version, there was however a 5.4 lightning and it was supercharged...
10-22-2003 05:40 PM
tm454
it is a 2000 Cobra

I called it a 5. 0 not knowing any better. I told him to CK this site for himself, maybe he will post.



Todd



Rat Rods Rule!
10-21-2003 01:40 PM
87442lover All cobras 96(maybe 94-95) and newer use the 4.6 281 V-8. There is no ford 5.0 anymore. Even the concept cobra uses the 4.6 with a blower on it. My friend has a 98 Cobra with a 144 and the 4.6 in it and the figures look almost the same on a dyno to the new cobras.

I dont believe there is a 5.4 in the 2000 cobras, at least not from the factory. But I'm not a ford guy, I just know my friend loves his cobra and thats how I found out the info.

Try using smaller injectors if your running so rich.
10-21-2003 07:54 AM
mstngjoe
Quote:
Originally posted by woodz428
I believe by 2000 that the Cobra "R" was using the 5.4 mod motor. So no Windsor there either.
I stand corrected.

It was the '95 R with the 351W. The 2000 did indeed have the 5.4 with 32 valves.
10-21-2003 07:49 AM
Kaylah You could do an HO "conversion" and go with a 4bbl, if all else fails and things get too expensive. Now this is based on the assumption that you are using a 5.0.
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