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4.6 swap question

  • Thread starter Thread starter kswitch
  • Start date Start date Mar 3, 2008
K

kswitch

New Member
Aug 18, 2004
11
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0
Mar 3, 2008
#1
  • Mar 3, 2008
  • #1
Hey i was just wondering if u are able to swap a 99-04 motor into a 98 gt without that much modification other than tranny,mounts, n maybe exhaust? If anyone has done this or something related because it was a thought that crossed my mind thx for the help you guys appreciate it
 

1990Coupe

Founding Member
Mar 11, 2002
1,462
132
114
Toms River NJ
Mar 3, 2008
#2
  • Mar 3, 2008
  • #2
I'm far from someone who know's alot about the newer models (i'm a fox guy trolling the 4.6 forums cuz i wanna get one ) But im pretty sure is the exact same engine with the exception of the heads, cam, and intake.. Newer 99-04 cars have the "performance improvement" heads, cam and intake.. vs. the Non P.I. cars of the 96-98 era.
 
R

rw98gt

New Member
Jun 26, 2006
68
0
0
peabody, ma
Mar 3, 2008
#3
  • Mar 3, 2008
  • #3
hey, don't change the whole motor do a pi head and intake swap, you will gain more power than a stock pi motor. this is because the 96-98 4.6's are 9.3:1 compression, the 99-04 are 9.7:1 compression, with the pi head and intake swap on a 96-98 4.6 the compression is 10.6:1. the block and heads squeez more compression w/the swap producing more power. i am in the process of doing this with my 98gt however i am porting, camming with springs. my motor will be putting out 400hp w/out the supercharger. that's awsome if your motor is running without issues just do the swap you will not regret it and w/a little extra $ you can make some serious power. good luck & hope this gives you something to think about...
 

CobraRed_96_GT

Active Member
May 20, 2006
1,421
4
39
UCSD/La Jolla
Mar 4, 2008
#4
  • Mar 4, 2008
  • #4
rw98gt said:
i am in the process of doing this with my 98gt however i am porting, camming with springs. my motor will be putting out 400hp w/out the supercharger.
Click to expand...

hope you're talking about using spray too then, otherwise you're blowing smoke
 
R

rugster

New Member
Aug 31, 2004
156
0
0
Mar 4, 2008
#5
  • Mar 4, 2008
  • #5
it was pretty easy, I did it without much trouble.
 
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