is it true that pi head swap gt's make more power then 99-04 gt?

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Jun 20, 2005

#1

• Jun 20, 2005

• #1

or is this just somthing that is said and assumed?

ive heard it alot, but didnt know if it was really true. is there ant proof like a 98 gt with just a head swap beating a stock 01 gt....or dyno #'s?

 

streetstang03

unModerator

Dec 27, 2003

0

1

0

the dark side of the moon/home of the 1999, 2003,

Jun 20, 2005

#2

• Jun 20, 2005

• #2

tis true

 

d98gt

Founding Member

Mar 14, 2002

4,505

59

204

SE Texas

Jun 20, 2005

#3

• Jun 20, 2005

• #3

I don't think they are all that much faster

I considered the PI Head/Intake swap, though my car has 112k on it so I decided not to mod it anymore. Just trying to keep the miles somewhat low

 

Bornstanger

Uncle 'Kiss Me''Kiss Me''Kiss Me''Kiss Me'er

Founding Member

Oct 20, 2001

476

0

26

Strongsville, OH

Jun 20, 2005

#4

• Jun 20, 2005

• #4

yeah it's tru. it's mainly due to our pistons. they bump the CR up with the PI heads on. unfortunately you have to run premium fuel all the time. if you were to mill the swirl dams in the PI heads though, we would retain the stock CR.

 

bierbelly

Dirty Old Men Need Love Too

Founding Member

Oct 17, 2001

1,598

4

58

Sterling, VA

Jun 20, 2005

#5

• Jun 20, 2005

• #5

Immediately after head swap, my '98 GT dynoed 248/292 rwhp/rwtq, with just a K&N as the only other (useless) mod.

 

Back2Mustangs

New Member

Sep 2, 2004

466

0

0

Jun 20, 2005

#6

• Jun 20, 2005

• #6

Yup. So to run boost its a good idea to change pistons to lower the compression back down. I was told that taking away the swirl dams was a biiiig

 

97v6Silver

it came to $4.56 and i got $0.44 change from a 5,

Apr 22, 2003

843

0

0

VA Beach

Jun 20, 2005

#7

• Jun 20, 2005

• #7

do they make more hp then 04's?

 

mrvax

Stay thirsty my friends

Founding Member

Nov 29, 1999

5,225

3

79

SN Moderator: Orlando, Fl.

Jun 20, 2005

#8

• Jun 20, 2005

• #8

bierbelly said:

Immediately after head swap, my '98 GT dynoed 248/292 rwhp/rwtq, with just a K&N as the only other (useless) mod.

Click to expand...

Agreed. (See sig.) The difference between Bierbelly's setup and mine is that he had shortie headers and I have the Magnaflow exhaust. I had 250/295 (running waaaay lean) before my EEC reflash. I'm probably right there now.

 

Orions98GT

New Member

Nov 20, 2004

234

0

0

Overland Park, KS

Jun 20, 2005

#9

• Jun 20, 2005

• #9

Back2Mustangs said:

Yup. So to run boost its a good idea to change pistons to lower the compression back down. I was told that taking away the swirl dams was a biiiig

Click to expand...

yes, I asked my mechanic about that, and he said it wasn't a good idea, so thats why I am purchasing a DSS 4.6. pi swapped 4.6 67k/fs pst.

 

Bornstanger

Uncle 'Kiss Me''Kiss Me''Kiss Me''Kiss Me'er

Founding Member

Oct 20, 2001

476

0

26

Strongsville, OH

Jun 20, 2005

#10

• Jun 20, 2005

• #10

i whole heartedly agree that you should change you pistons if you were gonna run boost. i'm just saying that if you wanted a quick fix, or didn't want to run premium cause you're a cheapass, then mill the swirl damns.

 

W

white96blown2v

New Member

Jun 16, 2005

58

0

0

detriot,MI

Jun 20, 2005

#11

• Jun 20, 2005

• #11

97v6Silver said:

do they make more hp then 04's?

Click to expand...

yes, this is so!!!!

 

ADRENLN

Active Member

Apr 16, 2003

2,342

3

49

NJ

Jun 21, 2005

#12

• Jun 21, 2005

• #12

wow thats amazing... you guys that have pi swaps, can you run a blower or is the cr too high? im talking just in general nothing to do with the swirl damns?

 

J

Justin03GT

New Member

Mar 30, 2005

199

0

0

Mount Pleasant, SC

Jun 21, 2005

#13

• Jun 21, 2005

• #13

just because they make more power, doesnt mean they are faster...i raced a PI swapped GT with roughly the same bolt ons as me, he didnt have a tune and i did but he was on drag radials, we both were cutting the same 60's and he was run 13.90s to my 13.60's and 13.70s...

now i'm not saying this is true for ALL of them...but the few that i have raced still werent able to keep up with me...

 

W

white96blown2v

New Member

Jun 16, 2005

58

0

0

detriot,MI

Jun 21, 2005

#14

• Jun 21, 2005

• #14

ADRENLN said:

wow thats amazing... you guys that have pi swaps, can you run a blower or is the cr too high? im talking just in general nothing to do with the swirl damns?

Click to expand...

If you build the motor correctly c/r (compression ratio) is not a big factor. Recently I myself learned this in a conversation with Scott at V/T engines.
however raising the compression ratio will require the lowerend of the motor to be strengthened as was as the block o-ringed.