5.4 Swap??
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Old October 9th, 2011, 10:09 PM   #1
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5.4 Swap??


Thinkin about doin a swap in my 00 vert to a 5.4. Will my top end fit the 5.4 block and wat are the pros and cons of doing so? Im fairly new to Mod motors so idk if Ford makes different style 2v heads or not. Reason being is, is the heads on my car just got a fresh port ad polish job, springs, and stage 2 cams and really would like to keep that stuff. So idk if 5.4 heads have higher combustion chambers over the 4.6 heads or if it even matters.
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Old October 9th, 2011, 10:28 PM   #2
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Theres no differance between 5.4 and 4.6 heads so you can swap your stuff right over. Id highly recommend using an HPS intake manifold. Its a great peice.

Its a really fun swap and i enjoy the hell out of mine. Aslong as you dont care about handling its great
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Old October 9th, 2011, 10:30 PM   #3
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Your heads will fit the 5.4, but the 5.4 is wider and your current lower intake manifold wont fit. If you are going to do a 5.4, might as well get rods and pistons for it and have the crank balanced. Remember, the pistons dont come all the way to the top of the block on the 5.4, so same pistons from a 4.6 in a 5.4 would give you a chunk less compression.
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Old October 9th, 2011, 10:41 PM   #4
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Originally Posted by sharkbait View Post
Theres no differance between 5.4 and 4.6 heads so you can swap your stuff right over. Id highly recommend using an HPS intake manifold. Its a great peice.

Its a really fun swap and i enjoy the hell out of mine. Aslong as you dont care about handling its great
I honestly dont kno where i plan on goin with my car as far as just a daily bad ass or and autocross or maybe a drift stang. All i kno is al of the above can never have enough power But thanks for the tip on the intake. My cousin has a complete Lightning motor i thought about maybe using the short block and puttin my heads on it and selling the Eaton and everything else and just have a strong internal with my heads and cams along with happy gas or some sort of force feeding. The options are limitless in my opinion. And having that Lightning bottom end would definately give me a good base to start with.
Originally Posted by DickH View Post
Your heads will fit the 5.4, but the 5.4 is wider and your current lower intake manifold wont fit. If you are going to do a 5.4, might as well get rods and pistons for it and have the crank balanced. Remember, the pistons dont come all the way to the top of the block on the 5.4, so same pistons from a 4.6 in a 5.4 would give you a chunk less compression.
What if i was to get a 5.4 out of F150 and just used the short block with my heads and the F150 intake and such?? Would I run into clearance issues or other more serious issues?
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Old October 9th, 2011, 10:44 PM   #5
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If you want to be able to use the stock hood id run the HPS intake. The 5.4 intake from a f150 is way too tall and your would have to cut your stock hood and modify the hell out of your harness
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Old October 9th, 2011, 10:52 PM   #6
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Originally Posted by sharkbait View Post
If you want to be able to use the stock hood id run the HPS intake. The 5.4 intake from a f150 is way too tall and your would have to cut your stock hood and modify the hell out of your harness
yea well on that then. HPS sounds like a winner to me. As far as the 4.6 and the 5.4 go, wat is the hp/tq difference from the factory and wat is the benefits of either or? Im just tryin to see if maybe the 5.4 swap is a waste of time and money or not ya kno? Like the money id spend buyin another motor i could possibly do like a rod and piston change and maybe do a little bit of boring. I guess thats something id have to add up before i decided i just would like to kno which has the best power rating and the most potential to put down some solid power.
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Old October 9th, 2011, 11:24 PM   #7
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basically all u will gain is 50ft lb of torque after the swap. they are rated the same for hp. u should definitely do a k-member swap to try and counter the added weight of the bigger engine.
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I'll try the vaseline tonight. Thanks for the tip.
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Old October 9th, 2011, 11:45 PM   #8
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to see any gains over the 4.6 is gonna cost some coin.
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Old October 10th, 2011, 12:14 AM   #9
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Originally Posted by liljojo4711 View Post
basically all u will gain is 50ft lb of torque after the swap. they are rated the same for hp. u should definitely do a k-member swap to try and counter the added weight of the bigger engine.
That's wat I figured. I figured it wouldn't be much. Next question would be does the 5.4 internals have the capabilities of producing and handling more power than the 4.6?
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Old October 10th, 2011, 01:09 AM   #10
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no, same shitty powdered rods and pistons. 400-425hp is about as high as i would go.
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Originally Posted by I8ACMRO View Post
I'll try the vaseline tonight. Thanks for the tip.
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Old October 10th, 2011, 01:13 AM   #11
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Warning from a californian! Make sure that you can get emissions passed and that there are no rules against registering after the swap!
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Old October 10th, 2011, 01:14 AM   #12
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Originally Posted by liljojo4711 View Post
no, same shitty powdered rods and pistons. 400-425hp is about as high as i would go.
Now is that number at the crank or at the wheels?
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Old October 10th, 2011, 03:47 AM   #13
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Originally Posted by LopnVrt View Post
Now is that number at the crank or at the wheels?
Wheel.

2v 5.4 gains over the 4.6 are mostly just in the low-mid range. Peak hp will be about the same, you might pick up more than most though with ported heads and cams. If I were you id do a 5.4 swap if you were worried about the condition of your current bottom end, and you really should consider upgrading rods/pistons in the 5.4 so that you aren't stuck with the same 400-450hp cap.
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Old October 10th, 2011, 05:26 AM   #14
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its not to bad of a swap,, iv been building mine over the last 4 months and im just about done now,, im hoping to get some good power out of it after i get a blower,,,i started with a forged and ballanced rotating kit from mmr and topped it off with 38cc tfs heads and a Edelbrock Victor Jr intake and a crapy set of adapter plates haha those plates are junk by the way,, if you do the swap , go with the hardballer for sure...
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Old October 10th, 2011, 10:07 AM   #15
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Originally Posted by superbeef1000 View Post
its not to bad of a swap,, iv been building mine over the last 4 months and im just about done now,, im hoping to get some good power out of it after i get a blower,,,i started with a forged and ballanced rotating kit from mmr and topped it off with 38cc tfs heads and a Edelbrock Victor Jr intake and a crapy set of adapter plates haha those plates are junk by the way,, if you do the swap , go with the hardballer for sure...
Well see that's my thing. If I'm goin to peak at the same and its more work and money to do a swap with the same power I'm making now with my 4.6, why not just save that money that'd id spend on a 5.4, intake, gaskets and such as that to do the swap and just buy a 5.1 stroker kit? I think I've priced them at around 2500 bucks. That's just my. 02¢ I'm new to these motors so I could be wrong
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Old October 10th, 2011, 11:08 AM   #16
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If yo go with a tubular k memeber would you be able to get some Longtubes? I know they wont work with the stocker
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Old October 10th, 2011, 11:59 AM   #17
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Originally Posted by number1gt View Post
If yo go with a tubular k memeber would you be able to get some Longtubes? I know they wont work with the stocker
Idk if theres any difference in the K-members in the verts and the coupes but Ive got BBK longtubes with the matching BBK short H-pipe on my car and ive still go the stock K-member still in. No issues just a royal pain in the ass to install.
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Old October 10th, 2011, 04:56 PM   #18
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Originally Posted by LopnVrt View Post
Idk if theres any difference in the K-members in the verts and the coupes but Ive got BBK longtubes with the matching BBK short H-pipe on my car and ive still go the stock K-member still in. No issues just a royal pain in the ass to install.
there is only one company that makes long tubes that will fit a 5.4 swap and they are about $1200. almost everyone that does the swap just uses stock headers.
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Originally Posted by I8ACMRO View Post
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Old October 10th, 2011, 05:07 PM   #19
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Might as well do a 4v swap and be done.
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Old October 10th, 2011, 07:59 PM   #20
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Well your going to have to get rid of the longtubes and get shorties. Theres only 1 set of longtubes that fit the 5.4 and they aint cheap.

I mean i can pull on 400+hp vortech 4.6 cars all day and woop up on some termi's.

Torque isnt anything to snuff at lol. 456rwtq is pretty fun when you have it ALL the time. I have my dyno sheet somewere around here. No were in my torque curve do i go below 400ftlbs
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