10-14-2010, 02:42 PM | #1 |
Mind Blowing
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302 to 351w swap
i am swapping a 351w in my 87 f150. i have searched and it seems like i will have to chip my ecm to make it run right. does anyone know for sure? should i get the ecm out of the 93 that the engine came from? it was a auto and mine is a 4 speed. thanks
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Slow Joe Racing 2008 dodge ram 5.7 HEMI 1993 lx with a 289 and a 3 speed on the floor WTB 1955 t-bird project |
10-17-2010, 06:14 AM | #2 | |
Daddy x4 ...we're done
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I'm not real familiar with the wiring and workings of the truck motor's fuel injection system, but their could be a lot of other things that become an issue too. Things like different wiring pin-outs between the ECU's, MAF curves, and load calculations (due to larger displacement). Maybe someone else that has done this swap can give some more info.
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-Brian '86 Mustang GT Convertible '88 Mustang LX coupe '11 Odyssey TE '21 Insight Touring Last edited by Italian LX; 10-17-2010 at 06:30 AM. |
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10-17-2010, 07:33 AM | #3 |
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Same basic setup, so the ECU from the '93 would work. I've heard some people say that the earlier (pre-'89) trucks had batch fire, but my best advice is to grab the engine harness too while you're at it just to be on the safe side. I know Ford loved to change crap on these trucks mid-year for no apparent reason. Example, mine is an early build '95, and uses different wheel seals, and a few other parts from the trucks with a build date of 5/'95 and up.
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Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS Last edited by EHardy1971; 10-17-2010 at 07:38 AM. |
10-17-2010, 06:40 PM | #4 |
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i know they have the same upper intake. the swap is not that big of deal but dont think the ecm will run it good.
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Slow Joe Racing 2008 dodge ram 5.7 HEMI 1993 lx with a 289 and a 3 speed on the floor WTB 1955 t-bird project |
10-18-2010, 03:31 AM | #5 |
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It's the same engine altogether until '95. That's when the 302's in the trucks went to the 351/H.O. firing order. Just swap the computer and you should be good.
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Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS |
12-06-2010, 08:23 PM | #6 |
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well my truck wires up 15426378 and the windsor wires 13726548. so looks like i will have to do the ecu swap.
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Slow Joe Racing 2008 dodge ram 5.7 HEMI 1993 lx with a 289 and a 3 speed on the floor WTB 1955 t-bird project |
12-07-2010, 05:05 AM | #7 |
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You could just swap cams...
Edit- Nevermind, it's way too early to think clearly
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12-07-2010, 08:49 AM | #8 | |
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Quote:
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Eric 89 LX Coupe-Juiced 01 Lightning-Boost 06 TBSS |
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12-07-2010, 10:06 AM | #9 |
3v's are slow
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No you were somewhat correct. ECU does not control the firing order. Just reroute the wires to a 351 order and it should work
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12-07-2010, 10:07 AM | #10 |
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That's what I was thinking. All that controls the firing order is the way it's wired, right?
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