99 4.6GT to 5.4L Monster

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ramseytex

New Member

Sep 18, 2005

4

0

0

Oct 18, 2005

#1

• Oct 18, 2005

• #1

I have heard that the cobra heads will bolt straight on to a 5.4L block with minor modification I have a set of 98 cobra heads and wondered what block or blocks these would bolt on to also any specifics would be great what kind of compression do these get what modifications are required, do any of the mounts need to be changed. Im looking to get around 11 - 11.5 compression and would be very interested in any information you may be able to offer.

I was looking at the navigator block since it was a DOHC to start with.

 

CobraM23

Founding Member

Oct 16, 2002

266

1

16

Johnson City, TN

Oct 18, 2005

#2

• Oct 18, 2005

• #2

As far as I know, you can use any 5.4L block. Doesnt matter if it was DOHC or SOHC, it should bolt up the same.

 

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ramseytex

New Member

Sep 18, 2005

4

0

0

Oct 18, 2005

#3

• Oct 18, 2005

• #3

Does anyone have any specifics?

 

jasonh_86

I

May 20, 2005

1,156

2

48

Arkansas

Oct 18, 2005

#4

• Oct 18, 2005

• #4

no clue.. try it and see

 

drew_shipley

New Member

Aug 5, 2004

63

0

0

Stow, OH

Oct 18, 2005

#5

• Oct 18, 2005

• #5

Have you considered what intake manifold you'll be using and the fact you'll need to change the computer and wiring?

 

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VividDreams

New Member

Jan 2, 2005

200

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0

Lebanon County, PA

Oct 18, 2005

#6

• Oct 18, 2005

• #6

should be able to use a DOHC 5.4 intake with the cobra heads, then just port the 5.4 intake, or bend over and buy a 2000 Cobra R intake

 

billfisher

Active Member

Jul 17, 2005

1,296

4

38

huntsville, AL

Oct 19, 2005

#7

• Oct 19, 2005

• #7

also front cover

 

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ramseytex

New Member

Sep 18, 2005

4

0

0

Oct 20, 2005

#8

• Oct 20, 2005

• #8

Does anyone have an solution Ideas for Fueling and the electronics?

 

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Roger_4.6_96

Founding Member

Jul 16, 2002

1,209

0

0

Reno,NV

Oct 20, 2005

#9

• Oct 20, 2005

• #9

drew_shipley said:

Have you considered what intake manifold you'll be using and the fact you'll need to change the computer and wiring?

Click to expand...

You dont have to change the wiring or computer.

 

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ramseytex

New Member

Sep 18, 2005

4

0

0

Oct 21, 2005

#10

• Oct 21, 2005

• #10

where exactly can one find a 2000 Cobra R intake manifold they seem to be rather dificult to locate also what is wrong with the 98 cobra intake I would use instead?

 

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VividDreams

New Member

Jan 2, 2005

200

0

0

Lebanon County, PA

Oct 25, 2005

#11

• Oct 25, 2005

• #11

after i thought about it, you cant get any OEM Ford parts for the Cobra R because you need your VIN number to get them.

HOWEVER,

check out this months MM&FF, they have an article on the new Sullivan Intake manifold. Its for 4.6 and 5.4 4V motors. you can run a carb or buy their upper manifold for Fuel Injection. It comes with the Upper and lower manifolds, fuel rails, and injectors. its a single plane style plenum, and the underside has bosses cast into each runner so if you wanted to run nitrous you just need to drill and tap them. also, it uses a cobra style throttle body. i believe the F/I version runs about 1800 bucks or so.

 

billfisher

Active Member

Jul 17, 2005

1,296

4

38

huntsville, AL

Oct 25, 2005

#12

• Oct 25, 2005

• #12

1. cobra intake w/ adapter plates.
2. your computer will work with adjustments for fuel/air.
3. booster for fuel pump.
4. front cover
5. headers from cobra
will barely fit. good luck.

 

69Rcode_Mach1

Active Member

Apr 20, 2004

1,473

1

37

Salt Lake City, Utah

Oct 27, 2005

#13

• Oct 27, 2005

• #13

I am curious to see how this turns out. Doesn't seem like it is worth all the effort. Would be pretty sweet to see a blown 5.4 laying 700 at the wheels.