mnkyboy Posted May 18, 2014 Author Share Posted May 18, 2014 Got my MPI engine on the stand today and stripped it down so i can get my engine back together. I also dug out the 4.0L HO TB I have been saving for the swap. here is the TBI setup next to the 2.5L and 4.0L,apperently my 2.5L has been suffering from asthma. Link to comment Share on other sites More sharing options...
mnkyboy Posted May 18, 2014 Author Share Posted May 18, 2014 I also stuck this guy on, apparently its gonna give my rig super special cooling powers. Link to comment Share on other sites More sharing options...
mnkyboy Posted May 19, 2014 Author Share Posted May 19, 2014 Starting to look like something. Link to comment Share on other sites More sharing options...
Comanche County Posted May 19, 2014 Share Posted May 19, 2014 This is good stuff... Link to comment Share on other sites More sharing options...
Jacob Ochs Posted May 19, 2014 Share Posted May 19, 2014 Starting to look like something. hey I like your thread! I have a question haha it's sort of late but you are running control arm drop brackets aren't you? I'm running them too and just want to know if they're offload capable! Link to comment Share on other sites More sharing options...
mnkyboy Posted May 19, 2014 Author Share Posted May 19, 2014 They worked great for me, I was half tempted to hook my new full width axles to them and keep running them but I want to change things up with the new set up. Link to comment Share on other sites More sharing options...
Jacob Ochs Posted May 19, 2014 Share Posted May 19, 2014 They worked great for me, I was half tempted to hook my new full width axles to them and keep running them but I want to change things up with the new set up. okay thanks a ton! I'll stick with the CADs then! Link to comment Share on other sites More sharing options...
benjy_26 Posted May 19, 2014 Share Posted May 19, 2014 Good progress! I'm very interested in your MPFI conversion. I've been mulling that over in my mind lately. Link to comment Share on other sites More sharing options...
mnkyboy Posted May 19, 2014 Author Share Posted May 19, 2014 So far it looks fairly easy. I should only need to hook up a few wires to make the engine run,most of the work should be tying the MPI system into my stock wiring and gauges. Link to comment Share on other sites More sharing options...
benjy_26 Posted May 19, 2014 Share Posted May 19, 2014 Good luck! I'm rooting for you. I'll probably end up stealing a bunch of your ideas, by the way. I've been thinking of going MPFI for the sake of forced induction, but then I stumbled upon some stroker builds that seem like they would work as NA builds. I'm honestly torn. Link to comment Share on other sites More sharing options...
benjy_26 Posted May 24, 2014 Share Posted May 24, 2014 It just occured to me: Will the TBI gauge cluster work with the MPFI sensors and ECM? Link to comment Share on other sites More sharing options...
mnkyboy Posted May 24, 2014 Author Share Posted May 24, 2014 Its more of a Renix vs. HO problem. The TBI doesnt really matter, I currently have a 4.0l Renix cluster in the truck. I am planning to run the Renix senders for the dash and I will also plumb in any senders/sensors that the MPI requires,so some sensors may get doubled up. As for the speedometer, the early MPI Wranglers up to about 93 used a pass through speed sensor with a cable speedometer. So I will have the speed sensor for the computer but can keep the stock guage. Link to comment Share on other sites More sharing options...
mnkyboy Posted May 25, 2014 Author Share Posted May 25, 2014 Here is the VSS You need an adapter to adapt it to the stock speedometer cable,the renix jeeps with cruise control have a speed sensor behind the guages that uses the correct adapter, you could probably get one from a speedometer shop but the stock ones are easy to find at the junk yard. Link to comment Share on other sites More sharing options...
benjy_26 Posted May 26, 2014 Share Posted May 26, 2014 Nice! You thought this one through, didn't you? :) Link to comment Share on other sites More sharing options...
mnkyboy Posted May 26, 2014 Author Share Posted May 26, 2014 I did a bit of research on the swap, there is almost no information on swapping MPI onto a 2.5l but there is lots of info on swapping the 4.0l injection onto a 4.2l which is a very similar swap. Link to comment Share on other sites More sharing options...
mnkyboy Posted June 1, 2014 Author Share Posted June 1, 2014 Havent had much time to play with the MJ lately,today i was able to reseal the oil pan and replace the rear main seal then move onto the inertia ring set up. I got out the bathroom scale and compared weights,the inertia ring add roughly 9.5 lbs to the flywheel. i installed my adapter pilot bushing,this will allow me to go from the 2.5L flywheel to a 93 and up AX15.here's the old pilot next to the new one.and installed Everything was going smoothly till i bolted it on,the guy who made the ring made it to have 0.015-0.030" clearance with the engine block. apperantly his block was cast a little different then mine so there is a clearence issue.should be an easy fix though. I also got the engine most of the way back together and got most of the engine wiring installed,now i need to start putting the vehicle and engine harnesses together. hopefully i can get it to fire up soon. Link to comment Share on other sites More sharing options...
mnkyboy Posted June 11, 2014 Author Share Posted June 11, 2014 Havent touched the MJ since my last post so today I decided to tackle the inertia ring issue. For anyone wondering laying under an engine block and clearancing it with a diegrinder is not a good time. I ended up taking off more then I originally thought but it fits fine, I also installed the new Centerforce clutch disc and the pressure plate. Now I can bolt up the trans and install the CPS. Link to comment Share on other sites More sharing options...
benjy_26 Posted June 12, 2014 Share Posted June 12, 2014 I am waiting with baited breath. Seriously, I'm stealing SO much of your build! Link to comment Share on other sites More sharing options...
mnkyboy Posted June 12, 2014 Author Share Posted June 12, 2014 Thats why I try to post info and part numbers,4 banger MJ tech is scarce so hopefully my build can help others. Link to comment Share on other sites More sharing options...
benjy_26 Posted June 12, 2014 Share Posted June 12, 2014 Thanks, man. That is TRULY appreciated. If you're ever down in Texas, I'm buying you a CASE of beer. Link to comment Share on other sites More sharing options...
mnkyboy Posted June 12, 2014 Author Share Posted June 12, 2014 Ive had a few other offers for beer from people around the country, I need to find a designated driver and go on a road trip.. Link to comment Share on other sites More sharing options...
benjy_26 Posted June 12, 2014 Share Posted June 12, 2014 Definately! Link to comment Share on other sites More sharing options...
mnkyboy Posted July 1, 2014 Author Share Posted July 1, 2014 I have been getting ready for NAXJA's NWfest so not alot of progress on the MJ. I took my daily driver XJ but didnt wheel it, I had an awesome time but really wished the MJ had been ready. Today I spent a little time in the garage and got the AX15 mounted up. Link to comment Share on other sites More sharing options...
88whitemanche Posted July 6, 2014 Share Posted July 6, 2014 Have any pics of the ax15 set up? What parts did you use to mate the ax15 to the 2.5? Link to comment Share on other sites More sharing options...
mnkyboy Posted July 7, 2014 Author Share Posted July 7, 2014 Its a 93 AX15 that I converted to external slave, I used a Dakota bellhousing with a centerforce clutch disc and an Advanced Adapters pilot bushing to adapt it to my 2.5l. EDIT: 96-98 2.5l AX15 Dakota bellhousing, I've been told that the 99-02 2.5l Dakota NV1500 bellhousing also bolts up,main difference is that it uses a bellhousing mounted starter instead of the block mounted starter. You need a Centerforce clutch disc #383824 or a disc from a 1984 Camaro 2.5l 4spd if you can find it.(must be 4spd,5spd will not work). If you have a 92 or newer AX15 you can use Advanced Adapters pilot bushing #716167,for 89-91 AX15 you would probably need to have one made. Also if you use a 89-93 AX15 you will need to convert it to external slave. Link to comment Share on other sites More sharing options...
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