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Old 06-09-2014, 08:21 AM   #1
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4v Swap from aviator

So I've come to the conclusion that I want a 4v but I don't want the terminator. My plan is to get the motor from an aviator and then build it and get it ready to put in the car. I have a 2000 gt and don't want to do boost on that motor or go internal so I will drive it until I'm ready to do the swap. I've read that I will need a wiring harness and I've read that I will not need one. I know ill need to find a 01 cobra intake and the do coils and injectors to have an actual "cobra" motor. I just need some guidance on what to do with the flywheel being a 6 bolt auto when I have a 5 speed that I plan on keeping. I know the internals aren't forged and cant hold much more then 550 hp but I plan on doing internals and more power when i'm making more money after college.
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Old 06-09-2014, 10:47 AM   #2
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4v Swap from aviator

Lincoln navigator motor. It's a 5.4 4v. Same 3.552" bore as the 4.6 but has a 4.165" stroke, which is much longer than the 4.6, which is the reason for the extra cubes. The longer stroke means more torque pretty much.

The 4.6 is a good high revving motor. if you plan to keep it below 7k though and want awesome power across the band (even low end which 4.6 isn't known for) look into the 5.4.
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Old 06-09-2014, 10:49 AM   #3
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I'm almost positive the 03 aviator motor is the 4.6 I might be wrong
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Old 06-09-2014, 10:54 AM   #4
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I'm almost positive the 03 aviator motor is the 4.6 I might be wrong

It is. I was just offering another suggestion. In my opinion unless you rev the 4.6 past 7500rpm then might as well go with a motor that has a longer stroke. The stroke pretty much equals torque.
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Old 06-09-2014, 10:58 AM   #5
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O ok I get it now 5.4 how more torque through out. How much harder would the 5.4 be
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Old 06-09-2014, 11:11 AM   #6
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4v Swap from aviator

5.4 makes a lot more torque throughout. And it will be just a little harder than the 4.6, it uses practically all the same 4v stuff that is interchangeable with the 4v motors, then with adapter plates you can do a Coyote intake manifold or Boss intake. The main difference in physical size is that the block is an inch taller than the 4.6 for the added stroke...... Also the most 5.4 are an iron block. But I believe there are aluminum blocks out there. It'll be about the same difficulty to swap in as a 4.6
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Old 06-09-2014, 11:14 AM   #7
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4v Swap from aviator

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5.4 makes a lot more torque throughout. And it will be just a little harder than the 4.6, it uses practically all the same 4v stuff that is interchangeable with the 4v motors, then with adapter plates you can do a Coyote intake manifold or Boss intake. The main difference in physical size is that the block is an inch taller than the 4.6 for the added stroke...... Also the most 5.4 are an iron block. But I believe there are aluminum blocks out there. It'll be about the same difficulty to swap in as a 4.6

It seems common for a 5.4 with a Boss 260 intake (special for the 5.4), with takeout Cobra cams, and decent heads make around 380whp with around 440wtq.

The extra cubes mean you pick up power a bit easier. It's doable to hit 500whp out of it NA.
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Old 06-09-2014, 11:50 AM   #8
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Hmmmm I'll look into it what would be a good donor vehicle
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Old 06-09-2014, 12:07 PM   #9
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Lincoln Navigator if you want the full long block. The 5.4 block can accept 4v or 2v heads so if you get a 5.4 2v you can swap it over to 4v with all the necessary parts.
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Old 06-09-2014, 12:10 PM   #10
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Ok sweet what do I have to do wiring wise if I was to do the 4.6 swap would I just have to reflash the ecu completely or would I have to do a new wiring harness
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Old 06-09-2014, 12:19 PM   #11
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Ok sweet what do I have to do wiring wise if I was to do the 4.6 swap would I just have to reflash the ecu completely or would I have to do a new wiring harness

I believe there is a mod you can do to the 4.6 2v wiring harness fir a 4v and it should work for both 5.4 and 4.6 4v
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Old 06-09-2014, 12:34 PM   #12
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My advice, just drive it and save for the Terminator you don't want or a 2011+ GT or a Mach 1 if you aren't going to have the $18+ anytime soon or be able to finance it. You'll spend just as much or more than that getting your GT there the right way, and then be stuck with a $18k+ 2000 Mustang GT you'll only be able to get $8-$10k for.

The 2V and the 4V minus the terminator both share the same internals and are NOT good for 550, more like 400/425 to the wheels... which the 4.6L 2V you already have can easily achieve with a supercharger. I would work on getting the rest of the car ready for the power such as all the "bolt ons" make sure your transmission/clutch are good, do suspension and then throw a supercharger on it.

Then sell it in 2 or 3 or 4 years when you've had your fun with it and get the Termi or the Coyote that is already "built" from the factory. Just my $.02
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Old 06-09-2014, 12:41 PM   #13
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I got full bolt ons a built t-45 from the t45 source and a built 8.8, I was gunna plan on building the 4v with forged internals and go as much power na
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Old 06-09-2014, 12:42 PM   #14
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It all pretty much depends if you want to go the practical route or if you want to do something more special.

If you want practicality yea the Terminator is going to be easier and will have resale value. But if you want to do something special then that's when you say "F*** practicality, and f*** resale value" build it how you want and put everything else aside.
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Old 06-09-2014, 12:51 PM   #15
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Well if you have a Zak built T-45 you are good to 500 with the stock input shaft and 600 with the 26 spline depending on which one you got.

Regardless even if you are saying "**** it I don't care about resale" you might as well supercharge or turbocharge it now because, as I mentioned, the Aviator motor isn't going to be able to take anymore power than your 2V. At that point I would go find a good block and start building that. Or look into various engine swaps that ppl are doing. At this point it is about as economical to swap in a low mileage Coyote as build a modular up. Your T-45 will bolt right onto a Coyote engine.

edit: Also unless you are going to want more than 700-800hp you can get there just fine on a $1500-$1800 set of ported PI heads.
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Old 06-09-2014, 02:48 PM   #16
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I wouldn't have to cut or splice into the wiring harness will I? I know the coils will plug right in. But what about everything else
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Old 06-09-2014, 05:45 PM   #17
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I wouldn't have to cut or splice into the wiring harness will I? I know the coils will plug right in. But what about everything else
For what the 4V swap? There is some wiring involved but its not bad. You need new COPs or there are also special swap "straps" that kind of jury rig the 2V COPs to work with a 4V.
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Old 06-09-2014, 06:04 PM   #18
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Ok sweet I gotta map everything out first then dive in thanks for the help
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Old 06-09-2014, 06:13 PM   #19
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Ok sweet I gotta map everything out first then dive in thanks for the help

Research is your friend. Budget everything out also. Even then stuff will nickel and dime you.
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Old 06-09-2014, 06:14 PM   #20
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I'm always looking for someone to hands on help 😏😏😏
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Old 06-09-2014, 07:00 PM   #21
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4v Swap from aviator

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I'm always looking for someone to hands on help 😏😏😏

How do you think I'm going to do my engine swap? Lol. Reason I suggested the 5.4 is cause that's what I want. I know it's not practical like Scotty said, but I think it'll suit me well.
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Old 06-09-2014, 07:01 PM   #22
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Where your from if your from jersey I'll be more then happy to help
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Old 06-09-2014, 07:03 PM   #23
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All the way over in California lol...... Scotty is in NJ though, maybe he will help lol
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Old 06-09-2014, 07:04 PM   #24
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Where are you from Scotty I'm from warren in somerset county and it's woth the trip
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Old 06-09-2014, 07:32 PM   #25
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I'm in Brick zoo Jersey. And no I am not affiliated with the jackasses at "Big Daddy". I drove over an hour south to get my old Cobra tuned vs taking it to them 10 minutes away.
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