'03 4.2 to 5.0 swap
#16
06-26-2010, 11:22 PM
No way in all tarnation you'd cram a 300-6 in there. The engine bay is tight enough for a v8! lol. Just fyi.. 5.4 is not direct bolt in. Check on the trans and i think the engine mounts are different because of the height difference. Also you'll have to swap out the entire wiring harness as well as PCM and might have to do a PATS reset with that.
#17
06-27-2010, 06:28 AM
Gotta put my .02 in here.....My old 97 LWB 4.2 Auto wasnt a powerhouse,BUT it had 168,000 miles on it when she got traded in.That engine was all original,and never missed a lick.
My newest F-150 is an 07 with the same powertrain,and I fully expect it to top 250,000 miles before I have to invest any major money in it(other than preventative maintenance of course)...
Personally,I would rebuild the Original motor,or get a reman long block.
My newest F-150 is an 07 with the same powertrain,and I fully expect it to top 250,000 miles before I have to invest any major money in it(other than preventative maintenance of course)...
Personally,I would rebuild the Original motor,or get a reman long block.
#18
06-27-2010, 09:08 AM
Join Date: Jun 2010
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
t.Thanks again for all the feedback
#20
06-27-2010, 12:05 PM
Then it will REALLY fly!! turbo will give you highway umph while a super will give you off the start torque.
#21
06-27-2010, 01:20 PM
Why wouldn't the dash work? If he left the stock computer in, and put the oil press, temp sensors on the block, I think they would all work. The trans will bolt to a 5.0. You need a flywheel for a 5.0. And you'll need to change the fuel pump to a low pressure one for a carb'd motor. Disconnect the return line. The hardest part would be making motor mounts. You have plenty of room for exhaust. Stock radiator will work, stock starter will work. If you use a serpentine belt set-up, you can use the stock alternator on a EFI 5.0 bracket.
I've done tons of research on this. I'm currently putting a built up EFI 5.0 into my '97 that had a 4.2. I'm even keeping the 4R70W that came in it(though its a real PITA to get it to function correctly). Cheapest I could rebuild my 4.2 for was $900. A used one near me is about $1000 for one with over 100k on it already. I don't like them. I'm spending that much for swapping in the crate 5.0 I already had in. Thats the harness, exhaust, torque converter, shift kit, and misc. odds and ends.
Its really up to you. If you want easy, low time, rebuild or put a 4.2 back in. If you want something different and have a little cash and some time, swap the 5.0 in.
I've done tons of research on this. I'm currently putting a built up EFI 5.0 into my '97 that had a 4.2. I'm even keeping the 4R70W that came in it(though its a real PITA to get it to function correctly). Cheapest I could rebuild my 4.2 for was $900. A used one near me is about $1000 for one with over 100k on it already. I don't like them. I'm spending that much for swapping in the crate 5.0 I already had in. Thats the harness, exhaust, torque converter, shift kit, and misc. odds and ends.
Its really up to you. If you want easy, low time, rebuild or put a 4.2 back in. If you want something different and have a little cash and some time, swap the 5.0 in.
#22
06-27-2010, 06:55 PM
Join Date: Jun 2010
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Why wouldn't the dash work? If he left the stock computer in, and put the oil press, temp sensors on the block, I think they would all work. The trans will bolt to a 5.0. You need a flywheel for a 5.0. And you'll need to change the fuel pump to a low pressure one for a carb'd motor. Disconnect the return line. The hardest part would be making motor mounts. You have plenty of room for exhaust. Stock radiator will work, stock starter will work. If you use a serpentine belt set-up, you can use the stock alternator on a EFI 5.0 bracket.
I've done tons of research on this. I'm currently putting a built up EFI 5.0 into my '97 that had a 4.2. I'm even keeping the 4R70W that came in it(though its a real PITA to get it to function correctly). Cheapest I could rebuild my 4.2 for was $900. A used one near me is about $1000 for one with over 100k on it already. I don't like them. I'm spending that much for swapping in the crate 5.0 I already had in. Thats the harness, exhaust, torque converter, shift kit, and misc. odds and ends.
Its really up to you. If you want easy, low time, rebuild or put a 4.2 back in. If you want something different and have a little cash and some time, swap the 5.0 in.
I've done tons of research on this. I'm currently putting a built up EFI 5.0 into my '97 that had a 4.2. I'm even keeping the 4R70W that came in it(though its a real PITA to get it to function correctly). Cheapest I could rebuild my 4.2 for was $900. A used one near me is about $1000 for one with over 100k on it already. I don't like them. I'm spending that much for swapping in the crate 5.0 I already had in. Thats the harness, exhaust, torque converter, shift kit, and misc. odds and ends.
Its really up to you. If you want easy, low time, rebuild or put a 4.2 back in. If you want something different and have a little cash and some time, swap the 5.0 in.
.THANKS AGAIN FOR ALL YOUR FEEDBACK.
#24
06-27-2010, 08:10 PM
Join Date: Jun 2010
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
#26
08-08-2010, 08:23 AM
Bump!!!
Just my .02 cents but from my experience the 302 is fairly less expensive to get HP out of than the 351w. It seems support for building these engines is massive! And as for all the negative comments about "downgrading" to carb, go pawn you opinion-fueled comments on someone else! I personally have preference for efi, but thats exactly what it is - a preference. I say, if you want it - get it! Just be sure to post pics as it sounds like a pretty interesting swap!
Just my .02 cents but from my experience the 302 is fairly less expensive to get HP out of than the 351w. It seems support for building these engines is massive! And as for all the negative comments about "downgrading" to carb, go pawn you opinion-fueled comments on someone else! I personally have preference for efi, but thats exactly what it is - a preference. I say, if you want it - get it! Just be sure to post pics as it sounds like a pretty interesting swap!
#27
08-09-2010, 09:37 AM
Downgrading to a carb is not just a preference or an opinion. In most parts for the country, switching from a modern fuel injected setup to a carb setup is considered an emissions and fuel economy downgrade, and is frowned upon and in many areas is illegal (just about any state that needs to know what engine you have or has emissions testing will fail you for downgraded engine swaps) Where I live you will have to get through a lot of red tape just to get it registered.
If you are gonna switch from a 4.2L, to a V8, go with a modular V8. You get fuel injection and the reliability of it.
You would be much better off just buying a nice used V8 truck.
If you are gonna switch from a 4.2L, to a V8, go with a modular V8. You get fuel injection and the reliability of it.
You would be much better off just buying a nice used V8 truck.
#28
08-09-2010, 10:12 AM
A downgrade from a 4.2L V6? Hardly, an Explorer 5.0 with a free flowing exhaust will make HP and TQ figures right up there with the latest 2v 4.6L. And of all the possible options a Windsor series engine will be the easiest V8 to install.. just need the right engine mounts. The 5.0 was also offered with an OBD-2 control system in '96+ trucks so there are junkyard computers that will plug in with a minimum of wiring harness changes.
#29
08-09-2010, 12:11 PM
Posting Guru
Join Date: Mar 2009
Location: Montague, NJ
Posts: 1,845
Likes: 0
Received 0 Likes
on
0 Posts
#30
08-09-2010, 02:26 PM
