Engine swap 5.0L to 5.8L - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-19-2000, 09:03 PM Thread Starter
 
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Engine swap 5.0L to 5.8L

I have a 1990 Full Size Bronco with stock 302 and E40D tranny. It's blown so I bought a 351W from a guy who claims its from a 1996 F350. I have checked the engine out and it has only 5000 miles on it. It's real clean and he let me take valve covers and oil pan off looks good. I was able to turn the crank also. You can still see the original honing marks on the cylinder walls. He was asking $1100 I talked him down to $650.00 cash in hand (after unpatient weeks of waiting and nagging), everything is there intake to oil pan, including wiring harness. But of course it's alot different than my '90. I called Ford and asked if I could use my harnesses and computer. The Tech said yes to the harness but I would have to get the computer for a 351w 1990 with the E40D tranny because this is what I have in my '90. Has anybody done this sort of swap? And is the Ford Tech correct?

90 Bronco w/302 auto. soon to be 351W with a little goodies 31-10.5-15 , 3.55 gears looking for mud!
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post #2 of (permalink) Old 12-19-2000, 10:00 PM
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Re: Engine swap 5.0L to 5.8L

The wiring harnesses are almost certainly not the same. I'm reasonably confident that the '96 engine is a MAF, so it has different sensors from your '90 MAP engine. That's why you have to change computers, too. But NO WAY can you use a '90 5.8L computer! For the same reason: different sensors, so different inputs to the computer. $650 sounds like a REAL deal, so I'd say it's worth quite a bit of effort to make it work - Just make sure it's working EXACTLY right so your work isn't wasted by ruining the new one.

Steve
83 Custom w/95 4.9L EFI, 78 NP435, 83 NP208, 83 D44IFS 3.07, 87 Ford 8.8ABS 3.08, Michelin LTX AT 31x10.50R15
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post #3 of (permalink) Old 12-20-2000, 01:40 AM
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Re: Engine swap 5.0L to 5.8L

You'd almost have to have the 96 computer. If you had it then it should be almost plug and play...except maybe wiring the gauges...but i couldn't tell you much about that. definitely worth doing, but i think those computers run about 200-300 bucks

It's a Jeep thing? My Bronco thing will run over your little Jeep thing.

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post #4 of (permalink) Old 12-20-2000, 11:17 AM
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Re: Engine swap 5.0L to 5.8L

87-91 gauges are electronically identical to 92-97 gauges. I'd shop junkyards for the computer if you can't get the original one for the engine (but that's my mantra!).

Steve
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post #5 of (permalink) Old 12-20-2000, 11:26 AM
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Re: Engine swap 5.0L to 5.8L

Anything is possible. If you intend on using the 96 engine complete, use the 96 wiring harness from the truck, and EEC. It will be essential due to the change from bank to bank firing to SEFI. Also the MAF will need to be wired in, as well as the elimination of the MAP...
You can use the EEC from a 1990, if you modify the 96 engine to use the sensors that the 1990 351 used, but that isn't the best way to go. It all depends on what $650 is getting you. Just the engine? Engine, harness, and MAF sensor? If it is just the engine, plan on doubling your investment cost due to scrounging for the necessary parts at junk yards, or buying new stuff from Motorsports.

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