transplant!!!! :c
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Will that be the only difference between the engines ? I found a 99 explorer 5.4 will that fit?
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Just found a HD engine supercharged for around 1800 I have a few questions before I even think about buying
1st can I use my original transmission will 4x4 work
2nd how different are the harnesses
3rd can I tune my computer with the engine
and Finaly is it even worth it?
1st can I use my original transmission will 4x4 work
2nd how different are the harnesses
3rd can I tune my computer with the engine
and Finaly is it even worth it?
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OP, Using the old ECU will mildly change how the engine performs but it will not be very noticeable. The timing and fuel map are very similar between the two. You may have a Decay rate issue but that's not really a big deal, it'll still run fine and as a temp fix there's always the restrictor. [EDIT] Between the NPI & PI and the even the 4.6-5.4. This is regarding the Expi motor. ]
When you decide you need a tune, you'll need to contact the dealer and tell them you need a programmer for your model of truck but you need the base tune for the engine you install. I've worked with SCT and Sniper for years tuning Mustangs and this is a very easy task.
Here's the simple answer, Drop in the motor. Find a secure place to mount the Coil packs. Going from a NPI to PI might not allow the Coil pack mounts to be a direct bolt on. I had to massage my holes a bit and make a support bracket. Nothing hard or intricate.
(Doing a COP Conversion w/ the old ECU is way more trouble than it's worth. I've done it and the wiring is insane.) Two Coil Packs and wires is a much better setup IMO. Just buy good wires.
(Remember I'm coming from Mustangs so, anyone feel free to add to what I've said.)
EDIT: Just noticed the HD engine post. I thought we were still talking about the Expi. Everything I said is still the same except, you'll need to have a base tune install to be able to drive it. I've seen guys install SC's and limp themselves to their tuner and Dyno but I'd be very very careful if you try to go that route.
Last edited by Wolvee; May 19, 2013 at 09:24 AM.
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Potentially and just an idea, would it not be cheapest to buy a 5.4 expedition (cheap, I see half decent ones at 2k regularly) and transplant everything you need, then sell the shell for scrap metal or part it out and get some cash back?
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The expi or HD engine is just a temperary I really wanna know where the real trouble is at
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He wont have to have the ECU and depending on how F150's PATS is on 98's, if he does change the ECU then he'd need a dash cluster and have a new key made with the correct transponder key.
OP, Using the old ECU will mildly change how the engine performs but it will not be very noticeable. The timing and fuel map are very similar between the two. You may have a Decay rate issue but that's not really a big deal, it'll still run fine and as a temp fix there's always the restrictor. [EDIT] Between the NPI & PI and the even the 4.6-5.4. This is regarding the Expi motor. ]
When you decide you need a tune, you'll need to contact the dealer and tell them you need a programmer for your model of truck but you need the base tune for the engine you install. I've worked with SCT and Sniper for years tuning Mustangs and this is a very easy task.
Here's the simple answer, Drop in the motor. Find a secure place to mount the Coil packs. Going from a NPI to PI might not allow the Coil pack mounts to be a direct bolt on. I had to massage my holes a bit and make a support bracket. Nothing hard or intricate.
(Doing a COP Conversion w/ the old ECU is way more trouble than it's worth. I've done it and the wiring is insane.) Two Coil Packs and wires is a much better setup IMO. Just buy good wires.
(Remember I'm coming from Mustangs so, anyone feel free to add to what I've said.)
EDIT: Just noticed the HD engine post. I thought we were still talking about the Expi. Everything I said is still the same except, you'll need to have a base tune install to be able to drive it. I've seen guys install SC's and limp themselves to their tuner and Dyno but I'd be very very careful if you try to go that route.
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When i didn't tune my own stuff, it was definitely waiting around for days or weeks for my Tuner to have time or towing it to the dyno.
Everythings just "kind of" tedious but nothings really hard.
If you're going to use the SC engine just remember to Use the engine Wiring harness that came with your Truck.
If you have two water temp ports and the New engine doesn't just tap the top coolant hose or intake cross over. (I'm unsure of the F150's.)
Inter Generational Modular to Modular is easy, it's The 3v and Coyote swaps are the hard ones. I have yet to even bother.
Everythings just "kind of" tedious but nothings really hard.
If you're going to use the SC engine just remember to Use the engine Wiring harness that came with your Truck.
If you have two water temp ports and the New engine doesn't just tap the top coolant hose or intake cross over. (I'm unsure of the F150's.)
Inter Generational Modular to Modular is easy, it's The 3v and Coyote swaps are the hard ones. I have yet to even bother.