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About mnkyboy

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    MJ Maniac

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  1. mnkyboy

    4bt into comanche?

    4BT stock has 70-80 less HP than a 4.0l and only about 40 ft lbs more torque even at low rpm. Being around 270lbs heavier than a 4.0l seems to me would be the bigger issue for an MJ than the power would be. Personally I'm not into diesel swaps, but if i did one i would be looking for something a bit lighter than a 4BT.
  2. mnkyboy

    HO CPS Compatibility

    I haven't done the CPS, but i run a 95 distributor on my 91 harness. I simply swapped connectors, the 95 cam sensor worked fine with the 91 ECM. I would suspect that the CPS would work too, maybe i will see if i can find the old 95 CPS that came with my injection set up and try it.
  3. mnkyboy

    2.5L head bolt

    I know they are the same, the newer ones just have more bolts with studs to mount things to. IIRC, the earlier engines have two bolts with studs on top and the later ones have 5 or so with them.
  4. mnkyboy

    2.5L head bolt

    Up till about 86 they used 7/16" head bolts, after that the 2.5l got 1/2" head bolts. Any 1/2" bolt set for an, MJ,XJ,YJ,TJ, or 96 up Dakota will work, i believe on 96 and up 2.5ls the number of bolts with studs on them increased, but otherwise they should be the same.
  5. Pulled the MJ out today to wash it off, i managed to get some clearer pics of the engine.
  6. mnkyboy

    Inertia ring ina 4.0

    I was concerned about it when i put it on there,i even had a stock flywheel on hand in case i hated it. I was actually surprised how little i notice it on the road, even with the naturally aspirated engine it wasn't bad. Even with the inertia ring, it still accelerates much faster than my 4.0l XJ does.
  7. mnkyboy

    Inertia ring ina 4.0

    No, mine was a one off custom made by a guy on 4bangerJP. It looks very similar to the Tri county gear one, but i believe mine's about a 1/2lb heavier.
  8. mnkyboy

    Inertia ring ina 4.0

    What Eagle said. Mine adds about 9.5lbs to the factory flywheel.
  9. mnkyboy

    Inertia ring ina 4.0

    I haven't seen anyone running one on a 4.0l, i have one on my 2.5l but as far as i know I might be the only one in the group that has one in an MJ. It does make a difference on the 4banger though.
  10. Looking at the harness it looks like the C101 only runs stuff on the engine harness and although the ECM is under the dash it is still just part of the engine harness, so the XJ engine harness should take care of all of that. I guess what i need to do is look at the pinouts where the engine harness plugs into the dash harness behind the fuse panel to see if they match up. I typically swap the engine & dash harnesses as a set, but these harnesses being the same years has me wondering. As unlikely as it is that they will play nice together, it would be nice to not have to swap the dash harness or do the rear harness splice.
  11. Getting ready to swap the harness on the boys MJ project, we have a 1990 MJ donor, i would prefer the 1990 harness but due to some previous owners the harness is a major rats nest. I also have a 1987 4.0l XJ harness that i could splice in, but the MJ is a 1987 2.5l so both are the early harness with the C101. What I'm wondering is if the 87 XJ engine harness would be plug and play with the 87 MJ dash harness, or if it would be best to just swap it all and splice the MJ rear harness into the XJ engine and dash harnesses.
  12. mnkyboy

    Mnkyboys other MJ Project.

    Got home from work today and found the boy going to town on the donor rig, he's slowly making progress.
  13. mnkyboy

    Jim Oshel has passed

    Sad news, Jim was a great guy.
  14. Not very good pictures but i got the cooler all hooked up today after work, I think it should work pretty good.