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Old 01-21-2014, 11:33 AM   #1
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PI Swap done

Hi everybody. I'm a "newbie" (LOL). I just completed my first PI swap and it was really easy. I wanted to share my experience with other first timers. Feel free to ask me any questions about common misunderstandings on this project.
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Old 01-21-2014, 11:56 AM   #2
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N000000b!!!! Lol
Got any before, during, and after pics?


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---------- Post added at 05:56 PM ---------- Previous post was at 05:56 PM ----------

Also a list


P.s. N000000000000000b!


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Old 01-21-2014, 12:06 PM   #3
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Yeah. My phone wont upload them though. I couldn't find all the details anywhere about common mistakes. So I thought I'd share. My first time working on a SOHC engine. Push rod engines are a lot easier to figure out.
Noobs are cool but Boobs are better!!))
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Old 01-21-2014, 01:39 PM   #4
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Did you do heads, cams, and intake or just intake?
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Old 01-21-2014, 01:49 PM   #5
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Did you do heads, cams, and intake or just intake?
Hi there. I did the complete top end. Assembled FRPP heads new @ $455/each , new PI intake. I'm on a budget so it worked out great.
My stock top end died at 3500 rpm's and just wouldn't climb. Now I have to go easy on the pedal so I dont hit the rev limiter @ 6000 rpms..
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Old 01-21-2014, 04:51 PM   #6
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Here are some pics.
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Old 01-21-2014, 07:00 PM   #7
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Congrats and welcome! Did You or do You plan to get a tune? Or You just gonna run 93?
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Old 01-21-2014, 07:00 PM   #8
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Feel a lot of difference from the PI SWAP? Thinking about doing it myself after I finish fixing up my project car.
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Old 01-21-2014, 07:20 PM   #9
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Feel a lot of difference from the PI SWAP? Thinking about doing it myself after I finish fixing up my project car.
I got the BAMA 4 Banks chip (I like to just turn the dial)
93 tune is awesome!!)) 1st burnout I hit 6000 rpms in the blink of an eye. The rev limier just popped and hesitated. I got used to the 4.10's with 245/45/17 TOYO Summer radials. I kept stock headers, Pypes catted X-pipe (had to cut it it to make the cats fit), new stock 19lb injectors, stock TB, CAI with 02 MAF, FRPP Cobra spark plug wires nice and high to keep the wires from arc'n on the heads. A TB spacer would be nicer to clear the fuel rails with the plug wires. Made sure everything was tight and clean. I get great mpg and its a WHOLE lot faster and pulls so much harder than stock npi heads. Worth every penny. I have $5,000 total into it the way it sits right now.
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Old 01-21-2014, 07:27 PM   #10
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Lowered 1 and 1/4 inch, no camber plates needed. Put 93 foxbody shocks front and rear. KYB Excel 2. Inexpensive and they handle awesome. The SN95 shocks blew right out. No problems w the foxbody shocks at all.
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Old 01-21-2014, 08:07 PM   #11
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I think any SN95 Would be fine with a Tuner, X-pipe, CAI and stock 3.27's.. I guess it depends on if you're racing or just want to juice it up a bit. Taking off the God forbid factory H pipe with the 6 cats is the first thing. Then a SCT tuner and that wakes it up just fine...
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Old 01-21-2014, 08:49 PM   #12
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Just becareful running the 93 tune, you could get some detonation.

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Old 01-21-2014, 08:57 PM   #13
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Just becareful running the 93 tune, you could get some detonation.

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IDK. It feels really tight. I only use Sunoco 93 octane and I put Octane boost in it. (to be safe) But I feel that I was very thorough putting it back together and I triple checked all the components. Im confident that everything will last me a very long time. And Ive been driving since 1984.. Ya gotta know your throttle. I dont even use my radio. The rpms is music to my ear..
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Old 01-21-2014, 08:58 PM   #14
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And if something goes... Ill just have another reason to rebuild and add some more power.. Lol
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Old 01-21-2014, 09:18 PM   #15
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You didn't think of upgrading cams while you were in there?


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Old 01-21-2014, 09:25 PM   #16
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Nah. I got lazy. I don't race anymore. It runs great and only took a couple hours to put everything back together. I like bolt ons. Easy is for meezy.. I would put more effort into a DOHC motor. But I cant drive stick. My hands were crushed by a 5,000lb SUV.
Its a bummer but thats why Im extra happy to be able to this stuff again. !
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Old 01-21-2014, 09:26 PM   #17
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Holy crap! Lol that sucks but good for you. And there's nothing wrong with modding for the fun factor


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Old 01-21-2014, 09:31 PM   #18
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Holy crap! Lol that sucks but good for you. And there's nothing wrong with modding for the fun factor


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Yeah buddy!! 2 years still treating. Nobody can believe I made it this far.
I don't have much money but own my HotRod outright. And it moves!!
So Im happy with everything I learned hrre from everyone. First time modular motor build. I would drive accross country with total confidence..
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Old 01-21-2014, 09:36 PM   #19
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You don't have to dyno for a PI swap?


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Old 01-21-2014, 10:06 PM   #20
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You don't have to dyno for a PI swap?


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Everyone told me that's the right way to tune it but I'm happy with the results.
It's a Night/Day difference. It went from Toad to Holy Frog in just a couple days of labor and the parts were reasonable. Bolt on. Simple. Bad a** results.
I had a 10 second Camaro... Been there done that. Lol... It's cool how many different year parts just bolt up.
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Old 01-21-2014, 10:21 PM   #21
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IDK. It feels really tight. I only use Sunoco 93 octane and I put Octane boost in it. (to be safe) But I feel that I was very thorough putting it back together and I triple checked all the components. Im confident that everything will last me a very long time. And Ive been driving since 1984.. Ya gotta know your throttle. I dont even use my radio. The rpms is music to my ear..
Cool I bet thay extra octane boost helps. Some say they have issues, others have none. Just throwing it out there Just in case.

I went two years without a radio, so I can definitely agree on the natural music a 4.6 makes
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Old 01-21-2014, 11:03 PM   #22
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Cool I bet thay extra octane boost helps. Some say they have issues, others have none. Just throwing it out there Just in case.

I went two years without a radio, so I can definitely agree on the natural music a 4.6 makes
Good lookin out!! Your Stang is awesome BTW!
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Old 01-22-2014, 08:41 AM   #23
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Good lookin out!! Your Stang is awesome BTW!
Thanks man, as is yours!
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Old 01-22-2014, 09:38 AM   #24
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I learned to stay away from 87 octane kn pi swap.....high compression needs 93 to burn without pinging. No dyno necessary after install it is a night and day difference as he mentioned. Ive had my pi swapped for 6 yrs so far... no issues. I may take your idea op however to run cobra wires. I would recommend if you can getting a set of 21 # injectors which run on a 02-04 mustang. The duty cycle is much better than the stockers on these motors.
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Old 01-22-2014, 10:13 AM   #25
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Thats great 1996mustang .Im happy with the outcome of my project. No worries about trouble shooting any issues. The OHC motor seemed complicated at first. After a couple of days of reading up on it and then rebuilding everything, it's like childs play now. Lol. The best part is, I have one car that does it all. My wife complains that Im constantly finding reasons to drive somewhere.. I like to joke with her by saying "look over there, that's yesterdays burn out"...

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Old 01-29-2014, 12:53 PM   #26
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I'm preparing for a pi swap on a 98 GT. I found 2004 4.6 heads and cams for 200, then I just need the intake, gasket kit, probably new studs because of the rise in compression, maybe a tune... that's all right? Would I need a new tb and plenum?
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Old 01-29-2014, 12:58 PM   #27
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I used my stock Tb and plenum. And Stock 19lb injectors. Supposively, you should go with a 70mm TB and 21lb injectors so it flows easier (less strain)

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Old 01-29-2014, 01:00 PM   #28
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Headbolts, Cambolts and Crankbolt are * one time use *... They can only be torqued once.

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Old 01-29-2014, 01:04 PM   #29
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Resetting your ECU can adjust to the PI swap properly but a BAMA Eliminator Chip is reasonable from American Muscle and I HIGHLY recommend it. Plus you'll get better gas mileage. I'm very happy with my mpg. You will need to run 93 octane gas. Or 91 at least to prevent detonation.

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Old 01-29-2014, 01:04 PM   #30
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I used my stock Tb and plenum. And Stock 19lb injectors. Supposively, you should go with a 70mm TB and 21lb injectors so it flows easier (less strain)

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2004 came stock with 21lb injectors unlike the other years with 19lbs


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Old 01-29-2014, 01:07 PM   #31
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I'm preparing for a pi swap on a 98 GT. I found 2004 4.6 heads and cams for 200, then I just need the intake, gasket kit, probably new studs because of the rise in compression, maybe a tune... that's all right? Would I need a new tb and plenum?
Best PI Swap Write-Up ! All you need to know - MustangForums.com
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Old 01-29-2014, 01:12 PM   #32
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2004 came stock with 21lb injectors unlike the other years with 19lbs


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Yes I will eventually grab 21 lb injectors and a bigger TB. I Forgot to clean my TB when I put it back on and it's sticking on really cool days. Stutters and stumbles a bit. I gotta get unlazy and do that. Lol
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Old 01-29-2014, 01:18 PM   #33
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Just bookmarked that link after read through it! Would 24# injectors be better to get besides a stock 21#? And a thinner gasket to bump the combustion a bit more...is that safe as well?
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Old 01-29-2014, 01:25 PM   #34
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I'd go with FRPP factory gaskets for reliability. I'd be worried about blowing a head gasket later on. Same thing with used head bolts. A bigger TB would give you a better kick than thinner gaskets. IMO. I found that 96-98 Cobra spark plug wires work better for clearance too. I used Autolite 103 plugs. 2 steps colder to help prevent detonation as well. Keep it safe. Did you ever set the timing chain on a OHC engine before?

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---------- Post added at 02:25 PM ---------- Previous post was at 02:25 PM ----------

Bigger fuel injectors dont add power.

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Old 03-06-2014, 08:03 AM   #35
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FYI.. Do NOT keep your stock 65mm TB. Just installed this BBK 78mm TB. It's "PERFECT" in every way.

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