Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Looking for opinion's on a 5.0 to 5.8 swap

 
  #16  
Old 11-22-2009, 05:25 PM
ginness72's Avatar
ginness72
ginness72 is offline
New User
Thread Starter
Join Date: Nov 2009
Posts: 12
ginness72 is starting off with a positive reputation.
Okay ,here's the skinny . I went and looked at the 91 f250, 5.8, 2 wheel drive. It does have the OD button on the dash.It started rite up , no smoke idled high for about 2 min. then drove it seem to run very well. valve cover gasket's are leaking and i think the rear main seal is leaking. Looks like it has been leaking for awhile. built up on the exhaust pipe and the tranny is covered in oil and built up dirt.
Here is the vin # 2FTHF25H1MCA84954 so if you guys have the way to know what it is please let me know or let me know where to get the info it would be great.
So , i am under the impression that i should be able to drop this motor and computer into my truck with the stock wiring harness. All the plugs should be the same and have no major issues.
If i am wrong about this info someone please let me know......
Oh where can i get a list of engine code's that tell me what they are??? thanks
 
  #17  
Old 11-22-2009, 08:56 PM
Bandit102
Bandit102 is offline
New User
Join Date: Nov 2009
Posts: 11
Bandit102 is starting off with a positive reputation.
Originally Posted by MAS96F150 View Post
two problems with it i see are that the 5 speed you have assuming its the stock mazda wont hold the 351 for long. they are pretty weak. and the 302 computer in your truck will run the 351 but wont have alot of power because of the displacment difference. or you could just transfer the motor trans wiring harness and computer from the parts truck to yours. i dont know if the computers will just swap, and if so you will have check engine lights because it will be looking for an automatic trans. at least my 96 did.
I don't think so. The 5.8 has a completely different firing order. Even being bank fired injectors, I don't think it would work at all. But he has the computer (I'm assuming) because of the mention of the donor truck. Use both the computer and the wiring harness that is already on the 351 engine. The Mazda 5 speed is a fairly weak transmission - that would concern me. The swap won't be a problem. Everything should bolt right up and plug right in. If memory serves, the computer doesn't give a damn if you have a 5 speed or an automatic...

The 302 fires 1-5-4-2-6-3-7-8
The 351 fires 1-3-7-2-6-5-4-8
 
  #18  
Old 11-22-2009, 09:48 PM
Conanski's Avatar
Conanski
Conanski is offline
Post Fiend
Join Date: Jun 2006
Location: Ottawa, Ontario
Posts: 26,558
Conanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant futureConanski has a brilliant future
Engine firing order doesn't matter with SD EFI, the injectors on 5.0 and 5.8 trucks are wired exactly the same. This will be a good donor motor but the computer is no good to you since that truck has a computer controlled E4OD transmission.
 
  #19  
Old 11-22-2009, 10:33 PM
BCWildman
BCWildman is offline
New User
Join Date: Sep 2009
Posts: 20
BCWildman is starting off with a positive reputation.
You're gonna love it! The 5.8 is a huge improvement.
 
  #20  
Old 11-22-2009, 10:52 PM
Bandit102
Bandit102 is offline
New User
Join Date: Nov 2009
Posts: 11
Bandit102 is starting off with a positive reputation.
Originally Posted by Conanski View Post
Engine firing order doesn't matter with SD EFI, the injectors on 5.0 and 5.8 trucks are wired exactly the same. This will be a good donor motor but the computer is no good to you since that truck has a computer controlled E4OD transmission.
I''ve successfully swapped computers from auto trucks to 5 speed trucks and never had an issue.
 
  #21  
Old 11-22-2009, 11:08 PM
ginness72's Avatar
ginness72
ginness72 is offline
New User
Thread Starter
Join Date: Nov 2009
Posts: 12
ginness72 is starting off with a positive reputation.
So i am a little up in the air.....Yes i will have the computer... i am picking up a driving 91 F250, 5.8, auto, 2wd , with the overdrive button on the dash... the truck is in working condition and will drive it home.
My plan was to swap out the motor and computer into my truck with the stock wiring harness...
Also doing some minor repair's while i have the motor out , ( i.e.) header's, ignition coil , plugs , wire's, cap, rotor,valve cover's, etc,
 
  #22  
Old 11-22-2009, 11:15 PM
ginness72's Avatar
ginness72
ginness72 is offline
New User
Thread Starter
Join Date: Nov 2009
Posts: 12
ginness72 is starting off with a positive reputation.
i also looked up the stock spec's from the 5.0 to the 5.8 and the HP is only like 20to 25 more from the 5.0 and the torque is like 40 more ft lbs . witch to me is not a lot more...
 
  #23  
Old 11-23-2009, 01:04 PM
ginness72's Avatar
ginness72
ginness72 is offline
New User
Thread Starter
Join Date: Nov 2009
Posts: 12
ginness72 is starting off with a positive reputation.
So , should i look for a different putter or what ?

You guy's are my only source of reliable ford info, should i look for a truck that had a c6 tranny .
The reason i am concerned, is the truck has to go through emission's and in CT if you have a check engine light on they automatically fail your vehicle.

I am trying to do this the right way..
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Fungus232
1987 - 1996 F150 & Larger F-Series Trucks
13
05-12-2015 10:55 PM
90' XLT
1987 - 1996 F150 & Larger F-Series Trucks
9
02-03-2015 08:50 PM
onthefloor4x4
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
20
04-07-2011 09:43 AM
f150forever
1987 - 1996 F150 & Larger F-Series Trucks
2
09-17-2010 09:39 AM
BeeRonCo
1987 - 1996 F150 & Larger F-Series Trucks
0
04-14-2010 07:25 PM


Thread Tools
Search this Thread
Quick Reply: Looking for opinion's on a 5.0 to 5.8 swap


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.