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Old 01-06-2015, 01:00 AM   #1
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Feel dumb don't judge

But what the hell is changed in a pi swap


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Old 01-06-2015, 01:06 AM   #2
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Heads, cams, intake manifold.


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Old 01-06-2015, 01:33 AM   #3
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Dont feel as dumb cause I was spot on

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Old 01-06-2015, 07:17 AM   #4
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But what the hell is changed in a pi swap


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Smartest thing was that you asked before you did something that could have cost you hundreds or thousands of dollars.

Like they say a closed mouth doesnt get fed.
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Old 01-06-2015, 08:22 AM   #5
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And just FYI, if you are a 99-up car, you already have all PI stuff which is identical to "Ford Racing" heads and intake. I dunno why but a lot of ppl ask how much power they'll gain swapping to FRPP or PI stuff when they already have a 99-04 car.
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Old 01-06-2015, 10:23 AM   #6
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How much tuning I'd going to be needed for a pi

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Old 01-06-2015, 11:31 AM   #7
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And just FYI, if you are a 99-up car, you already have all PI stuff which is identical to "Ford Racing" heads and intake. I dunno why but a lot of ppl ask how much power they'll gain swapping to FRPP or PI stuff when they already have a 99-04 car.
Like scotty said if you have a 99 and up mustang they are already on your motor bro. . . . its only a upgrade when you have a 96-98 ford mustang that had aluminum heads but non pi heads . . . . i dont see the point in tuning your mustang if its bone stock with pi heads or unless you have put a few mods on your car say like , 24lb injectors , cams , gears , TB like 75mm and up or if you going super charged , pro charger or turbo the motor then yea get it tuned.
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Old 01-06-2015, 12:41 PM   #8
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I have a 97 and im thinking of doing a pi swap with aggressive cams and a biger tb

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Old 01-06-2015, 06:40 PM   #9
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Going to want to do the supporting cast first and I suppose if you are going to do cams the time to do it is during a headswap since they are easy to get at. A NPI bottom end with a PI top and cams with all the bolt ons is a 300-320rwhp car.
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Old 01-06-2015, 09:03 PM   #10
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Should be more cause im already pushing 290

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Old 01-06-2015, 09:27 PM   #11
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How are you pushing 290 to the wheels with a stock non-PI motor? Or did I miss something


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Old 01-06-2015, 09:43 PM   #12
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How are you pushing 290 to the wheels with a stock non-PI motor? Or did I miss something


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You didn't miss anything. I've got the same question.


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Old 01-07-2015, 12:22 AM   #13
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Im not sure what is already done to it I got it dynoed When I first got it and it put out 290

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Old 01-07-2015, 12:23 AM   #14
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Not sure what was done to it before I got it but when I purchased the car I got it dynoed and it said its pushing 290

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Old 01-07-2015, 07:50 AM   #15
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What kinda Dyno was it because not every dyno reads the same. But I have a hard time believing its 290 to the wheels. Not saying your wrong but something is missing that we don't know of for it to make this much power.


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Old 01-07-2015, 12:05 PM   #16
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Quote:
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How much tuning I'd going to be needed for a pi

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Honestly, none. But tunes always help! If you are doing a head swap instead of an engine swap, I would recommend some 4v heads from low mileage mark VIII. You're already changing intake and exhaust anyway if you do a PI swap. If you have a NPI (non PI) engine, I don't think it would pay off that much to just do a PI head swap. There are much easier ways to pick up 30 horsepower.
If your NPI engine blows and you just want a simple drop in, you might as well do the PI swap instead of putting an NPI engine back into it. But if you're just trying to hot rod your NPI car, I would consider other methods. Its all gonna be good though so do what you want with your car man!
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Old 01-07-2015, 12:15 PM   #17
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Without a PI swap it most likely won't be pushing 290. IF your car did put down 290 on the dyno then it most likely already has a PI swap and upgraded cams. At that point it'll be believable


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Old 01-07-2015, 12:48 PM   #18
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Honestly, none. But tunes always help! If you are doing a head swap instead of an engine swap, I would recommend some 4v heads from low mileage mark VIII. You're already changing intake and exhaust anyway if you do a PI swap. If you have a NPI (non PI) engine, I don't think it would pay off that much to just do a PI head swap. There are much easier ways to pick up 30 horsepower.
If your NPI engine blows and you just want a simple drop in, you might as well do the PI swap instead of putting an NPI engine back into it. But if you're just trying to hot rod your NPI car, I would consider other methods. Its all gonna be good though so do what you want with your car man!
The only problem with a Mark 8 head swap is that you need the timing cover and chains as well. Plus it needs a tune and the wire harness needs modified to run. PI head swaps are literally swap and go so why waste the money and time in just a little more power?
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Old 01-07-2015, 03:22 PM   #19
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Yeah that's a good point I suppose. I just assumed the wiring harness would work Now I know lol
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