JOMJ87 Posted February 6, 2009 Share Posted February 6, 2009 Anybody got any good write ups on this. I know you can do it and run the HO injection but you make a bracket for the TPS and i don't know how its made. Thanks Cole Link to comment Share on other sites More sharing options...
Pete M Posted February 6, 2009 Share Posted February 6, 2009 I'm so totally confused. :hmm: What part of the HO system are you using? Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 6, 2009 Share Posted February 6, 2009 You want to run HO injection using a Renix ECU? Not going to happen... Renix is NOT a computer, it's an ECU. The HO system uses a PCM which is more classified as a computer. Two VERY different systems that are not compatible. Link to comment Share on other sites More sharing options...
JOMJ87 Posted February 6, 2009 Author Share Posted February 6, 2009 Pete am getting a 97 4.0 complete and using it. BLHTAZ: Well i used to think that too but i know it will work i have seen it driving and know how to do it. The only problem is you have to make a bracket to allow the TPS to work. TO EXPLAIN; you use the following from the renix TPS, distributor, Temp sender, CPS and flywheel, and any other sensors on the motor. The one that i know of was ran crazy good. Seemed more powerful then the HO before the switch. I am sure someone has done this or seen it or has a old post with pics. Theres a write up on at this link but no pics http://jeep.off-road.com/jeep/article/articleDetail.jsp?id=257881 Thanks Cole Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 6, 2009 Share Posted February 6, 2009 OK...so your not trying to run the "HO System", just the injection. I can see that working, but I don't see it being worth the effort and aggravation :shake: . There is no way that it produces enough of a difference in any category to be worth what you will go through what the guy did in your article to get it working or fix what ever may fail in the future :dunno: I made a nice difference in my Renix by simply putting some good injectors in it from Precision and got a 14% MPG increase, better acceleration, easier start, smoother idle etc, etc... and it only cost me about $100 and an hour of my time ;) :thumbsup: Be sure to post up the progress of this idea in the Project forum if you do go forward with it :cheers: Link to comment Share on other sites More sharing options...
Str8OuttaBallard Posted February 6, 2009 Share Posted February 6, 2009 I have a '89 renix ecu and a '92 donor ho and everything works fine... though I am using the '89 manual not the 92 auto that the HO was bolted to... Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 6, 2009 Share Posted February 6, 2009 I am sure that it can work fine that way, but the article linked to in the above post was done because the guy was basically forced to do it because he was sold an HO engine by accident and he didn't want to return it so he made it work. I see no advantage to doing all that work as it doesn't appear to be any type of worth while upgrade...just a bunch of work ;) . Link to comment Share on other sites More sharing options...
JOMJ87 Posted February 6, 2009 Author Share Posted February 6, 2009 Well here is the background of the build. I bought a XJ with cruise and power everything tilt comlun in really great shape. We thought the head gasket was blown but when i pulled the head the #1 piston aint all there. :fs1: So i needed and motor in great shape and i found one from a board member that is from a 97 and in good condition. I have thought of staying all renix but i would rather keep the HO injection. Str8OuttaBallard---did you use the HO tps??? does the HO tps and renix tps give out the same readings?? If so i can wire the HO one to the renix harness and be fine. just wanting to figure that last piece out there. Cole Link to comment Share on other sites More sharing options...
IggysPiggy Posted February 6, 2009 Share Posted February 6, 2009 The peice I made for mine is very basic it consisted of a polyurethane bushing shaved down to the proper size to make not quite a snug fit in the recessed hole. I then took my 89 tps (have done this to an 88 as well) and removed the screw that holds the arm on then i driled a hole thru the center of the bushing the whole way the same size as the screws shank. then i redrilled the bushing (I don't remeber the exact length but you can figure it easly by measure the screw length) so the head of the screw would be sunk into the bushing. This provided me with a base to dremel a flat slot for the newer throttle shaft. I then made a spacer to cover the bushing and gap in between the throttle body and the tps. I will work on pics sorry. I originaly looked at using the newer tps but unfortunatly when I tested the voltage is reverse from the renix system. Did you grabe the throttle cable from the newer jeep? I made the mistake of leaving it behind and of course i needed it as well which fuel rail are you using as well as which injectors? as this makes a running difference I found. The newer fuel pres regs are 49 psi and the older renix is 37-39psi I beleive (correct if wrong). I found it to create a rich cond. (which not so bad for me I'm working on turbo). P.S I am new to the forums been running my 89 for oh 6 years or so now it has all been home brew done (including lift, interior, exterior, as well as engine bay.)I also had an 88 but wreked it. Link to comment Share on other sites More sharing options...
BIGMASS Posted February 6, 2009 Share Posted February 6, 2009 SEE IF THIS HELPS One obvious route that you may be overlooking though is to mount the Renix TB to the HO motor. Although the HO TB has a 60mm butterfly it is still choked of to 55mm wich is only 3mm larger than the Renix TB's 52mm. This will allow you to keep the Renix throttle cable and all related transmition cables if running an auto. It is the route that I have chosen to take with my Renix to HO swap. Oh and FYI, the Renix TB can easily be opened to 60mm and fitted with an HO butterfly. Here's mine Link to comment Share on other sites More sharing options...
IggysPiggy Posted February 6, 2009 Share Posted February 6, 2009 that is not a bad option never thought of that did you open that yourself? I forgot to mention i swapped intakes as well to the ho version as well as an ho head. Link to comment Share on other sites More sharing options...
BIGMASS Posted February 6, 2009 Share Posted February 6, 2009 Makes sense to keep HO head since that and intake are the biggest change to the actual motor. I did bore the TB myself, but I did it on a milling machine using an offset cutter or boring head like this I seen a post here a couple of years back where a guy did the rough cutting with a large burr cutter in a drill press then finished it with a 3 stone hone. But as you can see in my pics it is rather close to the air bleed passage on the drivers side. If you have the machine shop do it get them to leave a couple thou. and finish size it with the 3 stone hone. However you decide to do it, once bored cut the slot in the shaft longer with a hacksaw blade or a fine cut off wheel and slip in the HO butterfly. During final tuning I ended up having to plug the air bleed passage all together to bring the idle down due to the greater volume of air that can now pass the butterfly and shortened air bleed screw. Link to comment Share on other sites More sharing options...
BIGMASS Posted February 6, 2009 Share Posted February 6, 2009 I also just found this referenced from an earlier post in the DIY project writeup section FOUND HERE REFERENCED HERE Link to comment Share on other sites More sharing options...
armybmbsqd Posted February 7, 2009 Share Posted February 7, 2009 In my 4.7 stroker I have HO head and intake on a Renix block. Being a stroker engine I wanted the most out of the performance gains. I have a bored out HO TB and Borla header. I used a HESCO TPS adapter. It's a little expensive but it makes the swap so much easier. The one thing you have to look out for is the HO block does not incorporate the knock sensor. I kept all of the rest of the Renix sensors except the EGR (HO does not use an EGR). I unplugged the harness at the control valve and have had no problems at all. Link to comment Share on other sites More sharing options...
Ibby Posted February 10, 2009 Share Posted February 10, 2009 I made a nice difference in my Renix by simply putting some good injectors in it from Precision and got a 14% MPG increase, better acceleration, easier start, smoother idle etc, etc... and it only cost me about $100 and an hour of my time ;) :thumbsup: What injectors did you use? I'm trying to find a replacement set for my 90 MJ. The jobber here wants close to $100 each for some OEM style ones. Did you change anything else when you put the new injectors in to get such an increase in mileage? Link to comment Share on other sites More sharing options...
BIGMASS Posted February 11, 2009 Share Posted February 11, 2009 The one thing you have to look out for is the HO block does not incorporate the knock sensor armybmbsqd, did you simply not use the knock sensor or did you do something else with it? I ask because I just finished assembling my short block today ('95 HO) and it has a threaded boss in the same location as the knock sensor in my Manche ('89 Renix) but I have not pulled the sensor from my '89 to try it yet because I'm still driving it until the HO/AX15 are ready to install. Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 11, 2009 Share Posted February 11, 2009 I made a nice difference in my Renix by simply putting some good injectors in it from Precision and got a 14% MPG increase, better acceleration, easier start, smoother idle etc, etc... and it only cost me about $100 and an hour of my time ;) :thumbsup: What injectors did you use? I'm trying to find a replacement set for my 90 MJ. The jobber here wants close to $100 each for some OEM style ones. Did you change anything else when you put the new injectors in to get such an increase in mileage? I used injectors from Precision Auto Injectors. CLICK HERE to see the ones you need. If you purchase from him, be sure to use ' JEEP ' in the discount / coupon code at check out for 10% off ;) . Link to comment Share on other sites More sharing options...
JOMJ87 Posted February 11, 2009 Author Share Posted February 11, 2009 The one thing you have to look out for is the HO block does not incorporate the knock sensor armybmbsqd, did you simply not use the knock sensor or did you do something else with it? I ask because I just finished assembling my short block today ('95 HO) and it has a threaded boss in the same location as the knock sensor in my Manche ('89 Renix) but I have not pulled the sensor from my '89 to try it yet because I'm still driving it until the HO/AX15 are ready to install. I would like to know this as well. Cole Link to comment Share on other sites More sharing options...
Ibby Posted February 11, 2009 Share Posted February 11, 2009 I used injectors from Precision Auto Injectors. CLICK HERE to see the ones you need. If you purchase from him, be sure to use ' JEEP ' in the discount / coupon code at check out for 10% off ;) . Thanks, I figured those were the ones. Just wanted to make sure. I've discovered that my head gasket isn't damaged, it's fuel getting into the oil pan causing my problems. These look like they'll solve that as well as give me some better mileage at the same time. Thanks for the info, it's much appreciated. Sorry for straying from the original post. Link to comment Share on other sites More sharing options...
BIGMASS Posted February 16, 2009 Share Posted February 16, 2009 Cole, I just finished the swap this morning at about 12:30. The boss that was in my block ('95 HO) did fit the knock sensor, 1/4 NPT if you want to chase the threads first. And there was a plug in the block for the lower coolant temp. sender so I didn't have to lengthen the wires to the t-stat housing. I mounted my bored Renix TB to the HO intake and welded the throttle cable bracket to the adapter. It started first crank and ran like a champ after I broke in the cam. Link to comment Share on other sites More sharing options...
JOMJ87 Posted February 17, 2009 Author Share Posted February 17, 2009 for those that have cpmpleted this what injectors renix or HO. And if you use renix fuel pump will it run the HO injectors? i got mine 2 crank but it doesnt idle well and it will not rev up. it seems to be lean. i am running HO injectors with the renix fuel pump. i am ready to rip it apart AND START OVER. EDIT cause I'm alittle to caught up in this to realize i had mess the TPS up and it was reading back wards as in 4.87 at idle and .08 at WOT sooo that may be my issue not the fuel pump but just for information which injectors are you guys running??? Cole Link to comment Share on other sites More sharing options...
JOMJ87 Posted February 17, 2009 Author Share Posted February 17, 2009 Oh and between us all we should make a DIY thread using the easiest built and then each of us with variations of that one chime in with what we did to get it to work. I think staying all renix fuel system is the easiest sounding with my cluster being a harder version. OH and BIGMASS did you not use the knock sensor. I left mine off and then hooked it up but didnt put it in the block just to eliminate it as a problem. I think my TPS is my problem though i got it backwards maybe. Cole Link to comment Share on other sites More sharing options...
BIGMASS Posted February 17, 2009 Share Posted February 17, 2009 I'm running the HO injectors with the Renix pump and swapped out the bump stick for a Crane cam and have more than enough fuel delivery. I did use the knock sensor. It has nothing to do with fuel delivery only timing. Link to comment Share on other sites More sharing options...
BLHTAZ Posted February 17, 2009 Share Posted February 17, 2009 As long as the motor is not stroked, you can use the same injectors from '87 - '95. Renix or HO does not matter. Link to comment Share on other sites More sharing options...
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