Difference 454 MPI VS 454 EFI?
03-10-2009 | 06:24 PM
#14
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From: Further South East of Dome Island
03-10-2009 | 08:37 PM
#15
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From: Rockford, IL
I had a 1996 7.4 LX. It was a 330 hp MPI motor with the plenum like the 454 and 502 Mag motors. The 7.4L was a 310 hp motor and throttle body fuel injection at that time. Think they only made the 7.4LX a couple of years.
Last edited by Revd Up; 03-11-2009 at 10:56 AM. Reason: additional information
03-10-2009 | 08:44 PM
#16
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From: Rockford, IL
The 7.4LX looked very close to a 502 MPI. I ran the 7.4LX a couple of years. Then over the winter one year I pulled it and put in a 502 MPI and put the 7.4LX sticker over the 502MPI sticker. None of my friends could figure out why it ran so much faster that before. I told them I just changed the oil and new spark plugs. I loved it. Sorry to get off track here so back to the question.
03-11-2009 | 09:11 PM
#18
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From: Boca Raton, FL
I wonder how my engine relates to 454 MPI and 454 Mag MPI. I've got a 1997 model 7.4 LX EFI which is a TBI version of the 7,4 engine. It has the similar plastic cover over the TBI as the old carb engines had and that cover has a label 7.4 LX EFI on it. I'm guessing it doesn't have more than 310 hp either?
03-07-2018 | 06:08 PM
#19
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Sweet!
The 7.4LX looked very close to a 502 MPI. I ran the 7.4LX a couple of years. Then over the winter one year I pulled it and put in a 502 MPI and put the 7.4LX sticker over the 502MPI sticker. None of my friends could figure out why it ran so much faster that before. I told them I just changed the oil and new spark plugs. I loved it. Sorry to get off track here so back to the question.
