how bout MPI swap from 94-95 4.0 instead of $2000 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-09-2001, 10:36 AM
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how bout MPI swap from 94-95 4.0 instead of $2000

I was doing some reading and started to wonder... If the MPI kit for the 258 is based on the 94-95 4.0 then maybe the mpi could be cannibalized from that year engine. I don't know if this would make it any cheaper or if it would make it more difficult than the savings would be worth. Any thougthts?

87 YJ 4.2L 31's, Rochester Carb, fresh rebuild with cam
78 CJ5 360 4" 33" 9000lb winch
One of 'ems gotta go probably sellin the YJ or mebbe the CJ
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post #2 of (permalink) Old 12-09-2001, 07:30 PM
 
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

I don't know, but I think it would definatly be worth looking into.
Chad

84 & 76 CJ-7's Give me a striaght six cummins diesel anyday. [email protected]
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post #3 of (permalink) Old 12-09-2001, 09:17 PM
 
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

At a local boneyard there was a 95 XJ with a 4.0 with 60,000 miles on it.They wanted $800 for the engine and all the wiring and computer.I think that would be the way to go if you are capable of doing the swap.

F.T.D
77 CJ7,79 CJ5 Plow Jeep.
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post #4 of (permalink) Old 12-09-2001, 09:32 PM
 
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

It would probably just be easier to swap in a 4.0 or if you just re-built the 258 swap in the 4.0 head and computer, you would have to provide a mount for the crank shaft posistion sensor though.

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post #5 of (permalink) Old 12-10-2001, 11:02 AM
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

It would be cheaper and a lot of folks have done it. The benifit of the kit is that all the parts are there when they are needed, there is no guess work and the parts are new. If you are handy enough and like fabrication then hit the boneyark and start pulling parts for it. Get hold of a set of instructions from the kit so you know ALL the little parts to grab. Best to get the whole wrecked Jeep and sell it off for parts when you are done.
With the kit, your paying for convenience.



'88 Sahara, 4.2 that runs thanx to every Cheap trick on this board. The rest is getting there![img]/wwwthreads_images/icons/blush.gif[/img]
post #6 of (permalink) Old 12-10-2001, 07:18 PM
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

that sounds like the way to go, you could get the 4.0 head, FI system and have the advantage of the longer stroke of the 4.2, better torque. Then you could sell off the block.

87 YJ 4.2L 31's, Rochester Carb, fresh rebuild with cam
78 CJ5 360 4" 33" 9000lb winch
One of 'ems gotta go probably sellin the YJ or mebbe the CJ
post #7 of (permalink) Old 12-10-2001, 07:18 PM
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

that sounds like the way to go, you could get the 4.0 head, FI system and have the advantage of the longer stroke of the 4.2, better torque. Then you could sell off the block.

87 YJ 4.2L 31's, Rochester Carb, fresh rebuild with cam
78 CJ5 360 4" 33" 9000lb winch
One of 'ems gotta go probably sellin the YJ or mebbe the CJ
post #8 of (permalink) Old 12-10-2001, 09:55 PM
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

The main problem with this idea is the Crank position sensor. You would need to purchase a relocation kit with vib. dampner. Those kits run about $400. You would also have to make your own harness or purchase one another $400. Hesco sells all of these parts and they are necessary for both the 4.0 swap or just the MPI swap. Did I mention you will need an electric fuel pump. I have been toying around with the idea of using a GM TBI. I have heard of many people adapting the TBI to many different engines. This is the basis for the Howell fuel injection system. You could purchase the entire tbi setup and harness from a Chevy 4.3L engine and adapt the TBI base to the Jeep intake and then have the computer reprogrammed for the 4.2's torque curve. I am researching this now and think it could be done for under $500.

Later,


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post #9 of (permalink) Old 12-10-2001, 11:11 PM
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

Very few are happy with the MPI conversion, so go with the 4.0 swap and save yourself a few bucks. And get a better running engine to boot. That is what I did.

CJ-8, 4.0, NP435, D44 x D60, ARB's, 4w Disc, 2"YJ springs, SOA, 1" Body lift, 38.5" TSL SX

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post #10 of (permalink) Old 12-11-2001, 04:59 AM
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Re: how bout MPI swap from 94-95 4.0 instead of $2000

I've installed two, had mine installed for the last 50K miles and it runs flawless, even runs circles around my buddies TJ, NO pinging like everyone claims, I have no complaints other than the cheesy k&n air filter that comes with the kit and I'd do the same thing all over again if I needed too, hope this helps out, later.

Bird

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