• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

2 valve to 4 valve engine swap questions...

  • Thread starter Thread starter Two Wheel Peel
  • Start date Start date Nov 2, 2004
T

Two Wheel Peel

Founding Member
Oct 16, 2001
94
0
0
PA
Nov 2, 2004
#1
  • Nov 2, 2004
  • #1
Hey guys I've been doing some thinking and I need your input. I have a 2001 GT that has the stock engine with a Vortech V2 9lb. The car has 22,000 miles on it and about 12,000 of those miles are with the blower installed. I expect that someday I'll be snapping a rod or damaging one of those crappy pistons. My original plan was to just rebuild the engine with forged internals and crank up the boost a little. Then, I started thinking about scrapping that idea and just swapping in a 4 valve Cobra engine. And when that breaks, I'll put the forged internals in it. Probably the 99-02 year engines.
I was wondering if anyone here installed a Cobra engine in their GT. I know that there are specialty Mustang salvage yards where I could find a decent used Cobra engine. I'm just wondering if the swap is worth doing. I'd be dealing with the cost of the engine, new computer, wireing harness, and any other things. The labor is free for me. And, would my Vortech bolt right up to the Cobra block. I'm guessing the bracket is the same as the 2 valve. I know I'd have to get the computer re-tuned and possibly change the fuel injector size and mass-air meter.
Please chime in and let me know if the swap is possible and what else I would have to purchase to complete it. Or let me know if you think my original plan of beefing up the 2 valve internals is a better idea.
 

tomustang

Psychotic Member
Founding Member
Jun 8, 2000
3,434
2
78
McLean Hospital
Nov 2, 2004
#2
  • Nov 2, 2004
  • #2
my opinion would be to just beef up your internals and go broke on boost
 
R

Rocketman

New Member
Apr 20, 2004
730
0
0
SoCal
Nov 2, 2004
#3
  • Nov 2, 2004
  • #3
 

new22003

New Member
Jun 22, 2003
657
0
0
Missouri
Nov 2, 2004
#4
  • Nov 2, 2004
  • #4
Just about eberything you need to know about swapping a 4 valve into a 2 valve car is here.

http://www.cobrapoweredgt.com/index2.html
 
You must log in or register to reply here.

Similar threads

E
4.6l auto to 5.4l 6 speed
  • EastanF5
  • Jan 22, 2026
  • SN95 4.6L Mustang Tech
Replies
0
Views
185
SN95 4.6L Mustang Tech Jan 22, 2026
EastanF5
E
C
SN95 Another Coyote swap list
  • catkiller
  • May 10, 2026
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
0
Views
125
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 10, 2026
catkiller
C
1
Engine Motor swap from a 2003 Explorer
  • 1996mustang new
  • Oct 9, 2025
  • SN95 4.6L Mustang Tech
Replies
7
Views
591
SN95 4.6L Mustang Tech Oct 16, 2025
squeak93
Forced Induction Bypass valve backwards?
  • Dontknowchit
  • Jun 25, 2025
  • Fox 5.0 Mustang Tech
Replies
3
Views
341
Fox 5.0 Mustang Tech Jun 29, 2025
JD1964
R
What's it Worth? 1997 Cobra, a ton of mods and restoration
  • riored97snake
  • Jun 18, 2026
  • What is it Worth?!?!?
Replies
2
Views
162
What is it Worth?!?!? Jun 21, 2026
riored97snake
R
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?