swap my 4.6 to a 5.4??

rd02gt

New Member

Mar 23, 2004

123

0

0

Brea, CA

May 13, 2004

#1

• May 13, 2004

• #1

Well i am just getting out some rad ideas that i could possibly do. I am in love with the cobra r, and how its so powerful stock, and is the same as a 03 cobra. Well if i could find the motor some where for cheap what would it take to do a swap,what kinda of 5.4 would i need, or what would i need? new mounts?computer? etc. please help that would be soo awsome if i could do that. thanks!

 

stallion98gt

New Member

May 12, 2003

1,802

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Los Angeles, CA

May 13, 2004

#2

• May 13, 2004

• #2

it would be pricey but possible...why not just getting a supercharger and be done ?

 

DarkHorse02GT

Member

Feb 12, 2004

156

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16

Tuscaloosa/Mobile, AL

May 13, 2004

#3

• May 13, 2004

• #3

I know for sure you'd need a new hood

 

B

Bullitt_#1346

Founding Member

Apr 13, 2002

767

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0

Atlanta

May 13, 2004

#4

• May 13, 2004

• #4

I think a new hood would be the least of your problems. I think it would take a lot of doing, and as far as I know they didn't sell the 5.4 from the Cobra R anywhere. You could get a 5.4 from a Navigator or something, but to get Cobra R power out of it you would have to do a lot of work to it.

I think you would be better off just buying a crate motor from Ford Racing or another company. Or just get a good shop to build you a new motor.

 

kirkyg

Founding Member

Jun 14, 2002

3,568

1

56

Beaumont, TX

May 13, 2004

#5

• May 13, 2004

• #5

a junk navigator build up is gonna be your most feasible, cost-affective option. The main reason i decided against a 5.4L DOHC swap is because they had so many problems making them rev high like the cobra DOHC 4.6L does. Once they pushed it passed the 6500 range there were alot of issues.

The intake issue has basically been resolved by modular performance:

http://www.modularperformance.com/products/intakes.asp

These intakes offer Fuel Injected and Carburated options for the 5.4L engine. They also plan to offer a twin screw/roots style blower mounting lower intake. If that comes out i may consider this swap again as compared to going with a 01 cobra engine and building up for a supercharger.

kirkyg

 

P

Phoenix00GT

New Member

Apr 26, 2004

245

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Bay Area, CA

May 13, 2004

#6

• May 13, 2004

• #6

if you really want the displacement I would just get a bored, stroked, cammed, valved, ported & polished 4.6 4v longblock...it would be a lot easier/more power efficient than transplanting a cobraR 5.4L motor...plus it would be primed for a blower if you did it right (just do it with the right internals) then strap on the new 2.2L kenne bell and you'll have more power than you ever knew what to do with

 

R

Roger_4.6_96

Founding Member

Jul 16, 2002

1,209

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Reno,NV

May 14, 2004

#7

• May 14, 2004

• #7

Ya just get a Beefed up 5.4 with DOHC Heads and you got one bad engine

 

smokin'Red35th

Member

Jan 9, 2004

493

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16

Las Vegas, NV

May 14, 2004

#8

• May 14, 2004

• #8

Ive been thinking about this same question. I think i read something in Muscle mustangs and Fast fords a while back on this. Ill have to look for it. I think they took the engine out of a van or something. ill look for it and get back to you.

 

R

Roger_4.6_96

Founding Member

Jul 16, 2002

1,209

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Reno,NV

May 14, 2004

#9

• May 14, 2004

• #9

Or just stick a Ford V10 in there

 

smokin'Red35th

Member

Jan 9, 2004

493

0

16

Las Vegas, NV

May 14, 2004

#10

• May 14, 2004

• #10

Roger_4.6_96 said:

Or just stick a Ford V10 in there

Click to expand...

then you would need a whole new computer sysem

 

V

Vabeachguy

New Member

Jan 27, 2004

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May 14, 2004

#11

• May 14, 2004

• #11

From KarKraft.com

New 5.4 Lightning Long block $3695.00

I am not sure what you would need though

 

kirkyg

Founding Member

Jun 14, 2002

3,568

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56

Beaumont, TX

May 14, 2004

#12

• May 14, 2004

• #12

You dont want a lightning longblock although that is a damn good price for supercharger and all. Navigator engine will do fine for alot cheaper and give you the opportunity to build it the way you want to. I think the 99-01 nav. engines have forged cranks stock too.

kirkyg