[smenzel444]

I'm planning on puttin a 99 4.6 SOHC in my 96 GT. I notice a couple problems already. I have the complete engine with harness and TB. Any advice would be appreciated.

1. The 99 has the coil on plug setup, can I use this with my cars wiring?

2. The fuel rail doesn't have a return, it has an electronic regulator or something on the left bank. What do I do with my original return line?

I was thinking of just using my 96 fuel rails, but then what will happen with the electronic regulator plug?

I could also use my 96 coils and harness, but I see some other differences in the wiring on the 99.

I think I'll quit now and let some of you experts tell me what's up.

Thanks a ton.

[Casper98GT]

Alot of youre questions can be answered by using the stock components. The coil packs are for that car. Not the motor. The motor is the same exact motor you have, except tis power improved.

So just put everything from youre car onto this new motor. you might run into a few bracket problems, but if you have them from the PI motor you will be all set.

If you have any problems, just PM me. Or setup another post.

[John C]

I just did a swap on my 98 stang GT. put in a 2001 GT motor. I changed the valve covers and timing cover from the old motor. Used the coils and wires instead of COP system and my old wiring harness from the 98 motor. Also used my 98 exhaust manifolds instead of the 01 ones. They would have worked but the "H" pipe is different and I didn't wish to buy one for a newer car. I have put about 100 miles on it and so far, so good. I got the car with a blown motor (guy ran it after cracking intake and ran it until it stoped!) I hope this helps.
Later, John C

[Casper98GT]

Yeah and its VERY simple swap if you go 2002 and above. No need to change everything.

[mustang_montana]

ive also done the pi motor swap, only thing needed was to mod the coil pack brackets a bit and move the alternator. its a straight forward swap like mentioned. im still running my 96s ecu too with no prob. i dont know why people dont do the pi motor swap instead of spending 2grand on a pi swap on their old ass- non pi motor.

[97rioredGT]

Just got off the ph w/a ford tech that told me he can get me a PI engine for my 97 (cracked head and suspected cracked block).
Total cost is $3022 with a $600 core.
Estimated labor cost is $1253.

I too think you are better off just getting the PI engine instead of spending 2k on heads + install.

My question is this...they seemed unwilling to do the swap because he said my car would require some modification.
I understand what he's saying about the wiring harness but he mentioned the "PCM".

I didn't see anyone mention that, is this "PCM" he speaks of going to be a problem?

I'll admit I'm a bit nervous about having someone do this because I don't know who I can trust to do the job right.

This is my daily driver but the 215HP non-PI and 2.73 R&P gotsta go!

[ChrisJ]

Just get a PCM from a 99+ donor car...Its not a big deal...It does not take that long to swap PCM's...

[mustang_montana]

pcm doesnt have to be touched, im still running my stock 96 computer with no prob. they shouldnt be making a big deal out of it, putting a 99 motor into a 96-98 isnt much different then putting the factory motor in. they just have to swap over the intake w/fuel rails, the stock wiring harness, and stock coil packs. they are just trying to milk you out of your $$$

[96GT_Driver]

Thats y its good to have a site like this, so you dont piss away your money if you dont have too

[sxynerd]

I just did this swap this week... USE the 96 wiring harnes and (coil/wires oviously) DO not use the 99 comp. the PAT system will not recognize your key and 99^ are all digital... Gauges, trans speed sensor, everything... Not worth it.... Coil/wires are better anyway! im am having an issue with the Gauge temp sensor throwing a code and keeping the fan on at all times. that the only issue so far. I am now finding out I should have put the second sensor somewhere else instead of splicing and extending over to the comp temp sensor....


easy install if you dont try it by yourself!

[jerb43]

If you think about it, you would be better off going with JUST the PI motor instead of converting everything over, you going to save a lot more money with just dropping a new PI motor in, not to mention the PI motor will also have less miles on it! Less Money, Less Miles + More Horse Power? Can't go wrong there!

[4point6GT]

Originally Posted by jerb43 If you think about it, you would be better off going with JUST the PI motor instead of converting everything over, you going to save a lot more money with just dropping a new PI motor in, not to mention the PI motor will also have less miles on it! Less Money, Less Miles + More Horse Power? Can't go wrong there!

YOU are right, I was thinkin of doin the whole PI swap thing but Im gonna save my money and look for a 00-04 4.6 gt engine instead to swap in. So around how much could one cost me?, i know it can start at atleast 3gs......2nd question, bout how much would a 03-04 cobra engine go for ? If i find one, cause thats what I would really like to swap into my 98 gt whenever i have the money but for now i will prolly just get a gt engine.

[ChrisJ]

Originally Posted by 4point6GT Originally Posted by jerb43 If you think about it, you would be better off going with JUST the PI motor instead of converting everything over, you going to save a lot more money with just dropping a new PI motor in, not to mention the PI motor will also have less miles on it! Less Money, Less Miles + More Horse Power? Can't go wrong there! YOU are right, I was thinkin of doin the whole PI swap thing but Im gonna save my money and look for a 00-04 4.6 gt engine instead to swap in. So around how much could one cost me?, i know it can start at atleast 3gs......2nd question, bout how much would a 03-04 cobra engine go for ? If i find one, cause thats what I would really like to swap into my 98 gt whenever i have the money but for now i will prolly just get a gt engine.

Why not just get a built shortblcok...Find a set of pi heads...Have the heads worked...Get the pi intake...Install it and blamo you have a built motor that should see close to 300rwhp...

I have seen the cobra engine go for 3k-5k...But if you want to go 4V then swap your car over to a 4V and put your own blower on it...The stock blower on the 03/04 cobras are not all that great...Go with some other blower...I dont know exactly what all is needed to do the swap in the NPI 96-98 GTs...I know in the 99+ all you have to do is get a chip burned with a 4V tune (put it in your car), splice in the injector harness (becuase it is easier then splicing in each individual injector), and you can either get an aftermarket MAF or splice in the 4V MAF...

Hope this helps...

[96GT_Driver]

well me personally am just gonna save and get the whole car 2003 cobra hopefully...lol

[4point6GT]

Originally Posted by 96GT_Driver well me personally am just gonna save and get the whole car 2003 cobra hopefully...lol

so u rather pay close to 30k for a cobra than just gettin its engine for bout 5k ? well you are gonna be savin for a long time, but if thats what you want then cool.

[Fryrice]

This thread is all over the place. Is there somethig wrong with your motor now ?
First thing you NEED TO DO is figure out what kinda performance you want and go from there .If you want 300hp ,and thats it,then just swap heads,intake and get cams and your done (tune maybe) . And save thousands of dollars.

If you plan on ever adding boost,then you NEED TO RETHINK your strategy.

You dont need to do an entire swap.The modular iron blocks run fine into the high 100,000's as far as miles. Unless your is cracked. Even then you can find one for less than $1000 if you shop around with private sellers.

$4200 for 260hp is OUTRAGEOUS ! Especially when you can buy a forged shortblock for less than that,and still have money left over to make it a longblock.Then you have a motor capable of handling 600hp if you ever need it.

You can buy a set of complete used Windsor heads for $3-400,maybe cheaper depending on the seller . get the PI intake with aluminum crossover for $150 or less,and buy the swap kit for around $100,and install it yourself .Its not that hard. Take the money you save from labor,and have the heads ported ,or get better cams.

Fuck spending thousands on a PI motor. Thats a total watse if you ever decide to bump the power over 400hp,and trust me you will want to.Because then,you have to spend another $1500 just for the forged parts,and not to mention labor if you outsource the work . Then by that time,you will have spent $8000 for a really nice shortblock,that you still need more parts for. . Keep your block man and swap the heads. Trust me.

[4point6GT]

Originally Posted by Fryrice This thread is all over the place. Is there somethig wrong with your motor now ? First thing you NEED TO DO is figure out what kinda performance you want and go from there .If you want 300hp ,and thats it,then just swap heads,intake and get cams and your done (tune maybe) . And save thousands of dollars. If you plan on ever adding boost,then you NEED TO RETHINK your strategy. You dont need to do an entire swap.The modular iron blocks run fine into the high 100,000's as far as miles. Unless your is cracked. Even then you can find one for less than $1000 if you shop around with private sellers. $4200 for 260hp is OUTRAGEOUS ! Especially when you can buy a forged shortblock for less than that,and still have money left over to make it a longblock.Then you have a motor capable of handling 600hp if you ever need it. You can buy a set of complete used Windsor heads for $3-400,maybe cheaper depending on the seller . get the PI intake with aluminum crossover for $150 or less,and buy the swap kit for around $100,and install it yourself .Its not that hard. Take the money you save from labor,and have the heads ported ,or get better cams. Fuck spending thousands on a PI motor. Thats a total watse if you ever decide to bump the power over 400hp,and trust me you will want to.Because then,you have to spend another $1500 just for the forged parts,and not to mention labor if you outsource the work . Then by that time,you will have spent $8000 for a really nice shortblock,that you still need more parts for. . Keep your block man and swap the heads. Trust me.

hey man, thanx for bitch slappin some sense into me, I needed it. Yes the 460 is nice but you are right, after payin for engine i will need alot more parts for swap then for all the labor if i dont do it myself could take me foreverrrrrr. I will be doin the whole PI SWAP, and yes I am plannin on addin a blower, what do you recommend to reach 400hp ?

[Casper98GT]

All this info youre getting is great. BUT.

You CAN buy windsor heads... but you need to replace SO much more when doing this swap.. its the romeo heads you need for the simple swap. So keep that in mind.

Also 4k for a PI motor? Where did you get this price!!

The PI swap isnt sometrhing i would have someone doing if they didnt know anything about these motors.

Also youre suggesting doing the PI swap over a PI motor. Youre compression ratio is going to be over 10:1. 10.5:1 about. You dont want to add a blower with more compression on top of that.

So i agree you need to think about what you want out of this car and think through all the facts of what is going to be needed for youre amount of HP you want.

And 400 is about all i would put into a 4.6 sohc motor without riping into it.

So if you want to keep youre stock block and throw PI swap on top of it you can be happy with 350hp tops. Thats with some machine work and good cams and a tune. OR you can go PI route and upgrade many parts and get around the same power, but still have compression left over with a s/c.

Im a strong beliver that you need to hear all the options for what you want, and i think you need to learn everything possible that you can. Keep reading all the posts you can find online about what you wanna do. Just learn as much as poissible.

[Fryrice]

Originally Posted by Casper98GT All this info youre getting is great. BUT. You CAN buy windsor heads... but you need to replace SO much more when doing this swap.. its the romeo heads you need for the simple swap. So keep that in mind. Also youre suggesting doing the PI swap over a PI motor. Youre compression ratio is going to be over 10:1. 10.5:1 about. You dont want to add a blower with more compression on top of that. So i agree you need to think about what you want out of this car and think through all the facts of what is going to be needed for youre amount of HP you want. And 400 is about all i would put into a 4.6 sohc motor without riping into it. So if you want to keep youre stock block and throw PI swap on top of it you can be happy with 350hp tops. Thats with some machine work and good cams and a tune. OR you can go PI route and upgrade many parts and get around the same power, but still have compression left over with a s/c.

I agree . Though depending on if you forge the bottom,you could get a different dish piston to lower the C/R ,but you would need to check into that.

Another option would to be and get the NPI blocked forged,keep the NPI heads (maybe port job) and add ablower to it,and your done.,and add some moderate boost to the set-up you have.You can buy a blower used and save a ton of cash.

[DragonFreak]

personaly after every thing i have heard and all the mustang shops i have talked to the 99 up swap is better than just heads.