For those interested in the 5.4 swap you may want to read this. A while Back I said I was going to compile a list of FAQís and parts for the 5.4 swappers. Well here it is. I guessing Iím with everyone else in saying that, Iím tired of seeing the same 5.4 questions pop up. Hopfuly this will cut down on the number of 5.4 posts that seem to be popping up. So Admins Please Sticky this.
Also, this list is going to be under constant revision. As I gather more information and as more questions get asked, Iíll post the Q&A here. Also once I start swapping my motor Iíll also update this with a few Technical tips. I have been told that I need to change my intake when I swap my 5.4 what are my options?
Well your options are simple really. You might be able to use the stock intake with a cowl (see next question posted below) or you can use a 4.6 intake with adapter plates. There is only one aftermarket 5.4 intake that was made to fit under the hood of a car, and thatís the HPS 5.4 intake.
Any 4.6 intake. Prices Very anywhere from $100-1000+
Some Examples are Trick Flowís Track Heat Intake BBKís 4.6 Dual Stage Intake Professional Products Typhoon Intake Edelbrockís Victor Jr. 4.6 EFI Intake HPSís 4.6 Hardballer Intake Reichard Racing 4.6 Intake Fox Lake P-51 Intake
Adapter plates. http://www.modularmustangracing.com/prod_sohc.htm
Normally they run around $300 you may be able to find the less on some sites. (Like on the above given link)
HPS 5.4 intake http://www.hiperformancesolutions.com/54.html
But be warned the 4.6 intake with adapter plates is taller than the HPS 5.4 intake.
Here are some pics from the mustang guys.
This is the 4.6 PI intake with the Adapter plates. See how far above the intake sticks out over the alternator?
This is the HPS 5.4 intake. Look at how much lower it is because it doesnít have those adapter plates. I have been told that the 5.4ís that came in the vans have a shorter intake than the F-150ís is this true and will it fit under the hood? And if it doesnít canít I just get a cowl?
I thought the same as well but after much research I come to believe the truck and van intake are the same. I have looked at many F-150 truck intakes and van intakes. Canít see a difference. I donít know if the stock intake will fit but I did take some measurements that should prove informational.
Here you can see both the Stock 5.4 intake and the HPS 5.4 intake
Here is the stock intake sitting on the heads my motor came with. You can see the ruler in the background.
Here is the HPS 5.4 intake on the same heads.
The HPS is 2 inches shorter than the stock intake. So I guess with the stock intake you could use a cowl hood. But remember the measurements I took were without the plenum.
I wish I could have used a 4.6 with the adapter plates but I didnít have a 4.6 intake and I wasnít about to go tearing my Vic apart. The plates are about an inch tall so add an inch on to what was used above as a very ruff guide.
But if you want to use a cowl: Cowl hood I'm swapping the motor but what about my accessories? Will they fit?
As far as I know all the accessories swap over from your 4.6.
(However, I was told about some 4.6ís having a long water pump and a short water pump. I donít know how that would change anything, but it would be nice to look into.) Do I have to make custom motor mounts?
No the 5.4 will bolt up to the 4.6 motor mounts. What kind of exhaust headers can I use?
Shorties for the most part, unless you have a 03+ car, but due to the taller deck height and the fact the motor is a little bit wider itís unknown if the Kooks long tubes will still fit.
There have been rumors that SLP long tubes can be used on Pre 03 cars, but it has not yet been confirmed.
Or you can get a custom set made, but then your talking big bucks They don't seem to sell any aftermarket 5.4 stuff?
They do for the Lighting, but yes itís hard to find. Luckily, unless youíre talking about the rotating assembly, you can use stuff off a 4.6. The cylinder heads are the same. As is most of the motor.
But if your looking for some valve train stuff here is good startManley Performance What kind of gains will I get/ will I see?
For a Crown Vic we donít really know yet. The 5.4 is rated higher than the 4.6.
5.4 2v were rated at 260hp and 350tq.
The 4.6 2v were rated at 260hp and 301Tq (Mustang)
The Panther platform where less, around 230hp and 280tq for the PI motors, P71ís are closer to 250. (According to Ford) and 200-215hp and 270tq for NPI.
But I do have some power numbers from the Mustang board.
This is from the mustang board (NOTE: all power number are at the wheels.)
Saleen S 330:
Power/Tq: 289/361 (imperfect tune)
Shortblock: Stock 03 5.4L F150
Pistons: Stock Rods: Stock Crank: Stock
Heads: Patriot Stage 2
Intake: PI w/ Reichard Racing adapter plates
Exhaust: FRPP shorty
Power/Tq: 279/332 (rich & -timing)
Pistons: Probe SRS -4.5cc
Rods: 3D H-beam w/ arp 2K bolts
Heads: Fox Lake Stage 2
Intake: HPS 4.6 Hardball'r w/ Reichard plates
Exhaust: FRPP Shorties
Cams: Comp XE270ah-13
Shortblock: Stock '02 F150 5.4 2V
Pistons:stock Crank:stock Rods:stock
Cams: Comp XE270AH
Heads: Patriot stage 2
Intake: Stock PI w/ Reichard adapters
Exhaust: Stock manifolds to BBK off road X
Power/Trq: 290/340 (mustang dyno)http://mustangboards.com/dyno-results/26534-5-4l-swap-dyno-results-here.html
This is just an idea of what you can expect to see.
If you going from an NPI 4.6 to a PI 5.4 your looking at a 55-60hp gain and a 80 more lbs-ft of torque.
Also when Espy did is 97 Town Car it was rated at 257 RWHP and 318 RWTQ. The problem is his 4500lbs Town Car ran a 13.97 @ 94 MPH. So I think the dyno was off by quite a bit. http://www.supermotors.net/registry/16549http://www.supermotors.net/registry/media/582024
We also had a Member named Dazed Ďn Confused V8 that had a 5.4 with a Vortec on his 2000 CV. Ran low 12ís all day long on it. Unknown what else was done to the engine. Do I have to use a 5.4 computer or will my 4.6 computer work?
Will the 4.6ís computer run the 5.4, however a tune will be needed for the best engine efficiency. What do I need to set my Rev limiter at?
Unless your 5.4 is built to take higher RPMís I would not push the stock internals past 5500. Can I use a 4.6 cam or do I have to use a 5.4 cam?
The cylinder heads are the same, so either cam will fit. But the 5.4 cams that are on the market are made for better towing, or for the supercharged Lightings. I have seen the 4.6 cams used with some success but it is believed that a custom grind would be your best bet. Will a 5.4 Fit in an Aero body?
Why not? Unless the engine compartment was way different in the 92-97 cars. Espy had a 97 Town Car and he has a 5.4. So I would have to say yes it would fit.My Aero as OBD I, will that still work with a 5.4?
I honestly donít know so I couldnít answer that. Everyone I have seen doing the swap has a OBD II car. How much more does the 5.4 weigh compared to the 4.6?
There is about a 30-pound difference in Block weight Iím building a High Performance 5.4, what kind of crankshaft do you recommend?
Check the year of the 5.4 you have. Some came with Forged steel cranks. If your 5.4 has a steel crank, save your money for another mod.What is the stock injector size for the 5.4ís?
5.4ís came stock with 19lbs, unless it was a SVT LightningWill the Lightning Motor fit in my car?
Will the motor physically fit? Yes. Will you be able to close the hood? No.
The 5.4 with the supercharger is too tall to fit under the hood. Luckily I have pics so I can show you.
As you can see the Wipple Supercharger makes it a little easier to fit under the hood. But it still sticks out.Can I keep my old exhaust setup from my 4.6 when I install my 5.4?
It depends really. If you have an H-pipe all you have to do is cut the H and extent it a bit. Remember the 5.4 is wider by a little bit.
If you have an X-pipe, I really donít know. I guess depending on where you have the X located you can cut before the X and lengthen the tubes so you donít have to mess with your X setup. What kind of gears should I get?
Thatís up to you. If your looking to do the swap just so you can have a better Daily Driver I say stay with the 2.73ís. If your looking for Performance, then itís personal choice. But remember, The 5.4ís make torque. So while you needed a 4.10 to get the 4.6 into itís power band more quickly, you donít need so much gear with the 5.4. Iím not saying donít get 4.10ís just make sure you can hook up. Other wise itís going to be spin city for you. What kind of power adder can I get for my 5.4?
Just like with the 4.6 the choices are endless. If your looking for a manifold mounted supercharger, like on the Lightning, chances are itís not going to fit under the hood without a cowl or a hole (See above pics) You can buy the needed parts to make any 5.4 into a Lightning motor. The only OEM supercharger for the 5.4 2v is the one off the F-150 Lightning.
You can use Tork Tech's M112 or the Magnuson TVS1900
supercharger with a spacer. But your going to have hood clearance issues.
You can get Centrifugal Supercharger as well, Paxton, and Vortech come to mind,
It shouldnít be to hard to make of the 4.6 kits to fit. They do sell 5.4 kits but I have no idea how hard it would be to get it to fit under the hood.Paxton 5.4 Paxton 4.6 Vortech 5.4 Vortech 4.6
If you want to go turbo, even with the 4.6, your going to have to make your own kit. But here is a starting point. You can always search junk yards or E-Bay for used turbos.http://www.ststurbo.com/
The easy power adder seems to be good ole N20. Just hook up a bottle and a 150 shot and call it a day.