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Hey all. Just bought a 1996 tbird lx with a 4.6 and the engine started knocking before I even made it home. So my question is if I buy a 99-04 mustang full motor it'll swap straight in with no modifications right? Just looking for some clarification. Thanks in advance.
 

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A 96-08 2V 4.6 will swap; those are in a lot of vehicles.

Except for the intake, You need to swap everything on the outside of the engine with yours. :)



A better swap is a PI-based Explorer swap; there's a lot here on every possible option on these cars' swaps.

:)

PI, DOHC, Coyote; it's pretty much all been done at this point.
 

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Oh OK, thanks! So I'd have to swap back to a npi intake? Kinda confused. I know I'd have to swap all my accessories but I hoped other than that it's a straight drop in.
 

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I don't know why he said intake, yes you do use the PI one, unless the motor was sourced from a truck or van. I think what he meant to say was everything 'attached to' the intake - fuel rails/injectors, vacuum lines, throttle body, EGR stuff, wiring etc. you transfer fro pm your current engine to the new one. You need to use your existing exhaust manifolds as well.
 

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I meant what I said, the intake stays, Everything else swaps. :)

The inlet elbow won't plumb vacuum the same, and the fuel rails won't come out near the fuel lines, so only the intake itself stays.

:grin2:

If you DO get an explorer engine, you will need a 95 front cover, lol.

Or a bunch of RTV. :)
 

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You will also need a tune and a tuner to get the full potential out of it as well.
 

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Don't forget your oil pan and pickup tube from your car also.

You will also need a tune and a tuner to get the full potential out of it as well.
This is true but you can use your stock MAF and injectors and the car will run fine. Just mentioned it because when people hear they have to get their car tuned it seems to scare people away from doing the swap.
 

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Don't forget your oil pan and pickup tube from your car also.



This is true but you can use your stock MAF and injectors and the car will run fine. Just mentioned it because when people hear they have to get their car tuned it seems to scare people away from doing the swap.
npi heads use around 10° more ignition advance than PI, so using the stock npi tune with a PI motor will lead to pinging, and will be down on power.
 

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npi heads use around 10° more ignition advance than PI, so using the stock npi tune with a PI motor will lead to pinging, and will be down on power.
This is true; and it wants a bit more fuel on top end, comparing the tunes I bought. :)
 

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I always speak on experience I've had. It's a lot more info for these swaps in Mustang forums and I read there also before doing it. Some said it will be fine but don't be hard on it in upper rpms. Some said it's fine with stock PI cams but recommended using 93 octane and some suggested getting it tuned. I took a shot in the dark and tried it un-tuned and it ran just fine with putting maybe 600 miles or so in it. If it would have blown up then it would be a $600 lesson plus time and work doing it again which I was fine with. I ran out of time working on the car before I moved to Anchorage. I'm not saying it runs it best without a tune but it's not a slouch either. I knew I wouldn't be getting the most potential from it until I put my 80mm MAF on and tuned it but it will come plus more.
 

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I had a few and mine never pinged even on regular gas but they were for sure under powered and tuning them, even to stock standards is big improvement over unturned but until you do get it tuned . I would run premium just to be safe, I always did. Only reason I knew it didn't ping on regular is what was left in the tank after the swap and test driving it and buttoning it all up..
 

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I had a few and mine never pinged even on regular gas but they were for sure under powered and tuning them, even to stock standards is big improvement over unturned but until you do get it tuned . I would run premium just to be safe, I always did. Only reason I knew it didn't ping on regular is what was left in the tank after the swap and test driving it and buttoning it all up..
A PI motor doesn't need premium. Only if you get it tuned for Premium is it worthwhile. It's a low compression motor, runs fine on 87 with a good tune.

If you don't tune it, and run it off a bone stock MN-12 ECU, it's going to run poorly. By running poorly, that doesn't necessarily mean it's going to ping a lot, or backfire, etc, but it's going to at the very least leave a lot on the table unused, and if you're not going to bother to tune it, why put a better motor between the fenders in the first place?

A tune isn't horribly expensive, and not that complicated for the good tuners to get a bone stock motor running properly in your car. You can get an SCT for cheap on Ebay, a tune is $100. It's well worth it, just do it. All that effort just to run at 3/4 or 2/3 of the potential? No thanks.
 

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Do anyone know what the ignition advance is for a 96-98 Mustang GT is? Just curious because it makes 20 more horsepower. Can't imagine it's too much different than an MN12.
 

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Do anyone know what the ignition advance is for a 96-98 Mustang GT is? Just curious because it makes 20 more horsepower. Can't imagine it's too much different than an MN12.
Probably more to do with better exhaust than the tune
 
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