My 5.4 Build
#21
4v > 2v
Thread Starter
Paid $950 which was what core cost was for the shop to get another one. I know the engines in great shape too, I just done know exactly how ill be running the wiring harness to the pcm etc.
#22
Senior Member
#23
Your wiring harnees wont reall need much. See if you can find a engine harness from a 01 Navigator with the 4v in it. Direct swap and will only need a tune because 4v's love timing. Looks to be a 01/03 by the intake ports. 4v is the way to go.. when my NPI/PI setup grenades a 4v will be replacing it.
#25
The weak link in 2v's are the rods and pistons. Definitely get those replaced with something better.
#26
#27
4V's are so awesome. Spark plug changes will be a breeze, and no more spitting plugs. Not to mention you can rev the **** outta them.
The only obstacles I've heard with installing 4v engines are:
- Exhaust manifold fitment (obviously since the heads are different) hopefully you have the stockers?
- ECM on the NAVI was for the 4r100 tranny. Not sure which on you have.
- Injectors will require ev1 to ev6 adapters
- COPS will have to be reversed
#28
4v > 2v
Thread Starter
Aw hell ya. This is hot rodding. I'm subscribed.
4V's are so awesome. Spark plug changes will be a breeze, and no more spitting plugs. Not to mention you can rev the **** outta them.
The only obstacles I've heard with installing 4v engines are:
[*]Exhaust manifold fitment (obviously since the heads are different) hopefully you have the stockers?[*]ECM on the NAVI was for the 4r100 tranny. Not sure which on you have.[*]Injectors will require ev1 to ev6 adapters[*]COPS will have to be reversed
I have 4r70w so I know there will be some issues with the computer.
Thanks for injector tip!!
Explain this COP reversed thing...
#29
Is something wrong with your 2v? It's only got like 135,000 right?
#30
4v > 2v
Thread Starter