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#1 |
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Regular
2000 Mustang GT
Join Date: Oct 2011
Location: Waycross, GA
Posts: 303
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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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#2 |
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Hooo Ha Ha
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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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#3 |
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MM Fanatic
2003 gt
5.4 32v on the way
Join Date: May 2007
Location: Omaha
Posts: 4,191
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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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2003 Mustang gt - usual mods - slowly working on 5.4 swap 2004 srt4 - Stock DD/winter beater Click here for your tuning needs Before asking a gearing related question click THIS link and enjoy all your saved time. |
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#4 | ||
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Regular
2000 Mustang GT
Join Date: Oct 2011
Location: Waycross, GA
Posts: 303
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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.
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#5 |
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Hooo Ha Ha
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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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![]() 410rwhp 520rwtq @ 12.9 psi |
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#6 | |
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Regular
2000 Mustang GT
Join Date: Oct 2011
Location: Waycross, GA
Posts: 303
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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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#7 |
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Enthusiast
Join Date: Mar 2009
Location: dallas
Posts: 676
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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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#8 |
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I Post Entirely Way Too Much
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to see any gains over the 4.6 is gonna cost some coin.
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Just a truck 5.4 3v: 264hp 317ft lbs rock stock The "search" button, its not just for porn piecing together the next project faster than your first sexual experience |
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#9 |
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Regular
2000 Mustang GT
Join Date: Oct 2011
Location: Waycross, GA
Posts: 303
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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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#10 |
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Enthusiast
Join Date: Mar 2009
Location: dallas
Posts: 676
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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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#11 |
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Regular
Join Date: Oct 2010
Posts: 130
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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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#12 |
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Regular
2000 Mustang GT
Join Date: Oct 2011
Location: Waycross, GA
Posts: 303
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#13 |
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MM Fanatic
2003 gt
5.4 32v on the way
Join Date: May 2007
Location: Omaha
Posts: 4,191
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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.
__________________
2003 Mustang gt - usual mods - slowly working on 5.4 swap 2004 srt4 - Stock DD/winter beater Click here for your tuning needs Before asking a gearing related question click THIS link and enjoy all your saved time. |
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#14 |
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Hardcore Enthusiast
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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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a bunch of stuff to make my car faster http://www.moddedmustangs.com/forums...e-member-1497/
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#15 | |
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Regular
2000 Mustang GT
Join Date: Oct 2011
Location: Waycross, GA
Posts: 303
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#16 |
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Hardcore Enthusiast
2002 mustang gt
Join Date: Jan 2010
Posts: 1,896
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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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Rock stock
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#17 |
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Regular
2000 Mustang GT
Join Date: Oct 2011
Location: Waycross, GA
Posts: 303
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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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#18 |
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Enthusiast
Join Date: Mar 2009
Location: dallas
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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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#19 |
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Regular
01 Bullitt 429rwhp 391tq
Join Date: Dec 2010
Location: Los Angeles
Posts: 326
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Might as well do a 4v swap and be done.
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Blk #200 Mods: V2-SQ Vortech w/Aftercooler 10psi, built motor, custom blower cams, Full MM suspension 429rwhp 391rwtq need a new alt..
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#20 |
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Hooo Ha Ha
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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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