PI Head Swap

Drtbkercr5 · December 27th, 2008, 01:21 PM

I am about to a PI head swap shortly but i have a couple of questions first.

1. If i were to buy pi heads out of a 2001 Bullitt Mustang, would i need to buy new valve covers? or would the ones out of my 97 gt work?

2. How hard is the swap to do? I will be doing it on the garage floor so no lifts or anything. It doesnt look like doing the actual swap of the heads will be that bad. But i have heard that the timing can be a bitch on these mustangs?

Will rep for help!

THanks

MustangMatt96GT · December 27th, 2008, 07:47 PM

depending on the bullitt you may need new valve covers... and the swap is easy as long as you have the patients...

MikeD05GT · December 28th, 2008, 08:31 PM

what part of 2001 are the heads from??

beg thru mid 01 you will need windsor covers

mid 01 thru 02 you can use your own...

Drtbkercr5 · December 29th, 2008, 10:29 AM

so the car happens to be in the crossover year. Im not sure if its early or late 2001. It was an ebay ad.

Uncle Humjaba · December 29th, 2008, 02:46 PM

Addressing the timing thing: it's really not hard. Just follow the timing guide in the chilton's book and you'll be set. Be sure to turn the engine over a few times by hand just to be sure. I'd be sure to have a vice grip handy to compress the chain tensioners though. Those were a PITA.

Drtbkercr5 · December 30th, 2008, 01:02 AM

Originally Posted by Uncle Humjaba

Addressing the timing thing: it's really not hard. Just follow the timing guide in the chilton's book and you'll be set. Be sure to turn the engine over a few times by hand just to be sure. I'd be sure to have a vice grip handy to compress the chain tensioners though. Those were a PITA.

Alright thanks for the info. How much hp gain can i expect from this and a catless midpipe?

Also did you run your 15.2 with the pi swap?

Drtbkercr5 · January 1st, 2009, 01:23 PM

Ok, i have a part number off of the Bullitt Pi Heads, it is

RF-1L2E-6090-D22D

Would you be able to tell if they are the windsor or romeo heads from that?

.BAD.Ronin · January 2nd, 2009, 12:56 PM

I think those are explorer heads man from like a late 01 early 02. Mine are SHM. The swap isnt too bad and you can do it in your garage. It sucks like all head changing/head gasket jobs...but the result is awesome

Uncle Humjaba · January 2nd, 2009, 03:44 PM

For the record, the 15.2 was before the PI swap, heh. I just haven't had it to the track since then. My friend's stang ran 14.4 consistently when he brought it to the track and though and I beat him when we raced.

sxynerd · January 2nd, 2009, 09:18 PM

BUy a PI motor and screw the PI swap./

MustangMatt96GT · January 2nd, 2009, 09:26 PM

Originally Posted by sxynerd

BUy a PI motor and screw the PI swap./

This is a good idea... only for one thing... just to have a slow car still.... i know that tenths are what edge out the competiton... and if that extra half point of compression even gives me only 3 horsepower, I am going to bump the compression up... Guess its all in how much money you want to spend too

sxynerd · January 2nd, 2009, 10:36 PM

I know I went from 15.7 npi to 13.90's PI then slapped on a S/C & gears and nailed 11.98 with 10lbs. Try getting a safe tune with a S/C, stock bottom end and anything more than 6lbs of boost with 10.6:1 compression...wont happen.

99% of all NPI engines are going to be high mileage engines and increasing cylinder pressure is just one added possibility of failure and unreliability. Why wouldn't you want to gain back some life of an engine by buying a low mileage engine and be able to upgrade later? Also Tearing into an engine doesn't seem smart to me when an engine swap could be done in a day.

If I were to do this all over again, I would have done one of two things... Swapped to to a 4v and S/C'd from there OR swapped to a 4v and built one nasty high compression street car with a bottle for the track.

MustangMatt96GT · January 2nd, 2009, 10:42 PM

Originally Posted by sxynerd

I know I went from 15.7 npi to 13.90's PI then slapped on a S/C & gears and nailed 11.98 with 10lbs. Try getting a safe tune with a S/C, stock bottom end and anything more than 6lbs of boost with 10.6:1 compression...wont happen.

99% of all NPI engines are going to be high mileage engines and increasing cylinder pressure is just one added possibility of failure and unreliability. Why wouldn't you want to gain back some life of an engine by buying a low mileage engine and be able to upgrade later? Also Tearing into an engine doesn't seem smart to me when an engine swap could be done in a day.

If I were to do this all over again, I would have done one of two things... Swapped to to a 4v and S/C'd from there OR swapped to a 4v and built one nasty high compression street car with a bottle for the track.

or just a small pushrod engine with a carb and a small 250 shot

thats my plan... should get 11.50s at my atltiude...

but i could do a PI head swap in less than a day if its just a head swap no degreening of cams and all that shit... and i put a NPI 27K mile motor, and guess what it ran better that all the PI n/a mustangs in my car club... closest one was a 14.89 and that was a PI engine with full bolt ons minus longtubes and cams... my NPI stock ran 14.68. guess it could be argued quite a bit... but mine also had a fresh set of head gaskets and been gone through and now has less than 450 miles on itsince june.

January 3rd, 2009, 04:46 PM

You are gonna love the PI swap bro and with your gears and tune it is really gonna wake up the tired NPI block.. Good luck..

Drtbkercr5 · January 22nd, 2009, 11:42 AM

Yea i really hope so. I just hope my bottom end dont give out. After that. Its time to boost!!

slobra97 · January 27th, 2009, 12:28 PM

What mustangs have the original PI heads? GT? Years? Help!

Drtbkercr5 · January 27th, 2009, 02:28 PM

99-04 gt. Youre gonna want an 01 or newer though i think because then you wont have to buy different valve covers. Mayve someone else will chime in with exact details

Drtbkercr5 · January 27th, 2009, 02:55 PM

i take it this guy was instantly banned?

Drtbkercr5 · January 27th, 2009, 02:59 PM

And now the pic is gone. Thanks whichever mod took care of the guy that shit all over my thread

sxynerd · January 27th, 2009, 03:46 PM

What did you decide to go with?

December 27th, 2008, 07:47 PM	#2
MustangMatt96GT Proud American 1996 Mustang GT 10.76 @ 122 with d/a of 8365 ft Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,168 iTrader: 3 reviews	depending on the bullitt you may need new valve covers... and the swap is easy as long as you have the patients... __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions Blown Small Block Ford with a hole in the block. 9.5 Dart Block 400 CI being saved for. Just because you can fuck a cactus doesn't mean you should. Never Lift Racecars

December 29th, 2008, 02:46 PM	#5
Uncle Humjaba Enthusiast 1996 Mustang GT Premium 15.2@91 Join Date: Aug 2007 Location: Tracy, CA and Clemson, SC Posts: 592 iTrader: 0 reviews	Addressing the timing thing: it's really not hard. Just follow the timing guide in the chilton's book and you'll be set. Be sure to turn the engine over a few times by hand just to be sure. I'd be sure to have a vice grip handy to compress the chain tensioners though. Those were a PITA. __________________ "He is no fool who gives up what he cannot keep to gain what he cannot lose."

January 2nd, 2009, 12:56 PM	#8
.BAD.Ronin Newbie 1996 Mustang GT Join Date: Jan 2009 Location: Georgia Posts: 31 iTrader: 0 reviews	I think those are explorer heads man from like a late 01 early 02. Mine are SHM. The swap isnt too bad and you can do it in your garage. It sucks like all head changing/head gasket jobs...but the result is awesome __________________ Full Steeda G-Trac Suspension, Stage 2 SHM PI heads, FRPP High Flow Intake, Fluidyne Radiator, HID light conversion, Cobra Brake upgrade, FR500 17x9 Anthracite, BBK cold air, SHM valvecovers, SHM bore/stroke kit.

January 2nd, 2009, 03:44 PM	#9
Uncle Humjaba Enthusiast 1996 Mustang GT Premium 15.2@91 Join Date: Aug 2007 Location: Tracy, CA and Clemson, SC Posts: 592 iTrader: 0 reviews	For the record, the 15.2 was before the PI swap, heh. I just haven't had it to the track since then. My friend's stang ran 14.4 consistently when he brought it to the track and though and I beat him when we raced. __________________ "He is no fool who gives up what he cannot keep to gain what he cannot lose."

January 27th, 2009, 12:28 PM	#16
slobra97 Newbie 1997 Mustang GT 14.6 @ 98 Join Date: Dec 2008 Location: Hutchinson Posts: 43 iTrader: 0 reviews	What mustangs have the original PI heads? GT? Years? Help! __________________ 1997 Mustang GT, Cobra Front Bumper, Cobra R hood, , Cobra Suspension, Cobra Brakes, Cobra Steering, Cobra Emblems, Cobra 2003 Black Rims, and Blacked out tail lights, 3 Inch Exhaust w/o cats, two MAC mufflers, Custom H pipe

December 28th, 2008, 08:31 PM	#3
MikeD05GT MM Fanatic 2005 Mustang GT Join Date: Dec 2007 Location: Cedar Grove NJ Posts: 3,207 iTrader: 0 reviews	what part of 2001 are the heads from?? beg thru mid 01 you will need windsor covers mid 01 thru 02 you can use your own...

January 2nd, 2009, 09:18 PM	#10
sxynerd Regular Join Date: Oct 2006 Posts: 457 iTrader: 0 reviews	BUy a PI motor and screw the PI swap./

January 2nd, 2009, 10:36 PM	#12
sxynerd Regular Join Date: Oct 2006 Posts: 457 iTrader: 0 reviews	I know I went from 15.7 npi to 13.90's PI then slapped on a S/C & gears and nailed 11.98 with 10lbs. Try getting a safe tune with a S/C, stock bottom end and anything more than 6lbs of boost with 10.6:1 compression...wont happen. 99% of all NPI engines are going to be high mileage engines and increasing cylinder pressure is just one added possibility of failure and unreliability. Why wouldn't you want to gain back some life of an engine by buying a low mileage engine and be able to upgrade later? Also Tearing into an engine doesn't seem smart to me when an engine swap could be done in a day. If I were to do this all over again, I would have done one of two things... Swapped to to a 4v and S/C'd from there OR swapped to a 4v and built one nasty high compression street car with a bottle for the track.

January 3rd, 2009, 04:46 PM	#14
BlackSunshine Guest Posts: n/a	You are gonna love the PI swap bro and with your gears and tune it is really gonna wake up the tired NPI block.. Good luck..

January 27th, 2009, 03:46 PM	#20
sxynerd Regular Join Date: Oct 2006 Posts: 457 iTrader: 0 reviews	What did you decide to go with?

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