PI Swap-Worth it or not?

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03-16-2008, 11:54 AM

#11

98F150/GT

2nd Gear Member

Join Date: Jan 2005

Location: Maryland

Posts: 185

RE: PI Swap-Worth it or not?

slightly more than a stock PI due to the compression.

03-16-2008, 05:51 PM

#12

MN STANG

Thread Starter

Join Date: Oct 2007

Posts: 5

RE: PI Swap-Worth it or not?

Well it sounds like the swap is the way to go.

Can anybody recommend a good shop in the
Twin Cities area?

03-16-2008, 06:05 PM

#13

tbirdscwd

5th Gear Member

Join Date: Sep 2006

Location: CA

Posts: 4,039

RE: PI Swap-Worth it or not?

Quote:

ORIGINAL: 1BAD3V

I thought a PI swap in a non-pi 4.6 GT brought your HP up to what a stock Pi-GT has. Am I wrong there or what?

A PI swapped engine will produce more HP because of the increased compression ratio. The PI heads on the 96-98 bottom ends raises the C/R to about 10:1

03-17-2008, 07:09 PM

#14

98redstang

5th Gear Member

Join Date: Mar 2008

Location: NJ

Posts: 2,312

RE: PI Swap-Worth it or not?

im looking to do the swap too and how much would it cost to get tuned? Im doing the swap myself so just the tune not the labor

03-17-2008, 07:16 PM

#15

lizzyfan

Underboss

Join Date: Jan 2006

Location: Helaware

Posts: 20,273

RE: PI Swap-Worth it or not?

Quote:

ORIGINAL: sxynerd

I gained 81rwhp when I swapped in a 99 PI motor.

If I had to do again I would of just done a PI motor swap!

03-17-2008, 07:31 PM

#16

gbic1

Join Date: Aug 2007

Location:

Posts: 37

RE: PI Swap-Worth it or not?

No tune yet but have only light driving and no trips to the strip. We did our own swap. I bout the heads off Ebay for 340 shiped. I spent another 250 on valve job. Head set was around 350 also. My heads were used and came with the intake manifold. So with coolant and oil and filter about a grand.

03-17-2008, 07:36 PM

#17

tylerl90

2nd Gear Member

Join Date: Dec 2007

Posts: 390

RE: PI Swap-Worth it or not?

On 96-98 GT's, without a PI swap you better expect **** for power.. They are pretty terrible without it..

03-17-2008, 07:58 PM

#18

Sxynerd

6th Gear Member

Join Date: Feb 2006

Location: Virginia

Posts: 11,786

RE: PI Swap-Worth it or not?

Quote:

ORIGINAL: Zanador

Quote:

ORIGINAL: gbic1

Did PI heads BBK headers BBK CAI BBK X pipe. BIG difference in driving. Havent been tuned yet. Still looking for good recomendation on the South side of Chicago.

Woah, you are running around with a PI swap without tuning?

That is a ticking timebomb man. Not only are the cams different, the manifold flow a TON better, but you bumped the compression up considerably.

Get that thing tunned, even if it is just a canned tune for now.

I was still running rich even after swapping the PI motor And all my mods. He'll be alright, just geting bad MPG because the fuel tables don't acount for the better flow. It's not a ticking time bomb, stop believing everything you read on the internet, and don't scare this guy into thinking he HAS to do something right now. I've see fuel tables and stock a/f with all types of mod motors and there's not much difference in the stock tunes.

Quote:

ORIGINAL: 98F150/GT

slightly more than a stock PI due to the compression.

The increased compression is minimal and wont account for very much HP, Less than 12hp. 10 is being generous. With my tune I made 81 more rwhp and I have yet to see "for my own eyes" a PI head swaped car with better numbers than me. It would have more to do with the supporting mods and tune than any bump in compression.

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