in2fords
NAXJA Forum User
- Location
- Lincoln City, Oregon
that sounds good. even if I swap the entire harness it will give me insight to what I need working.
The Official 97+ HO in a Renix Thread
- Thread starter downshift1
- Start date
downshift1
NAXJA Forum User
- Location
- the outer limits aka Socal
Renix Power- I have a ton of photos and diagrams, let me know what you need. 
Harlee&Tahoe
NAXJA Forum User
- Location
- South Lake Tahoe, CA
This is great I've been looking for this info! I'm tikiling the thought of my 87'renix block, 91-95 head, 99-01 intake manifold, T.B., and injectors
downshift1
NAXJA Forum User
- Location
- the outer limits aka Socal
Ok she's up and running (pretty well I might add).
I used the Renix IAC, works perfectly in the HO throtle body.
As for the TPS, I passed on all homebuilt adapters for tha Hesco adapter, and am glad I did. It's a perfect setup offering all the adjustment needed to set up the TPS.
Intake air temp sensor- I made a extention for the HO sensor location.
I'll post up the belt # later for the Renix alternator and bracket with 01' A/C and P/S.
I'm still working on the Cruise Control and plumbing the R134 A/C set up/
I'll try and get some pics up soon.
88xjlover- the manifold will bolt up but without the head you won't see much in performance gains.
I used the Renix IAC, works perfectly in the HO throtle body.
As for the TPS, I passed on all homebuilt adapters for tha Hesco adapter, and am glad I did. It's a perfect setup offering all the adjustment needed to set up the TPS.
Intake air temp sensor- I made a extention for the HO sensor location.
I'll post up the belt # later for the Renix alternator and bracket with 01' A/C and P/S.
I'm still working on the Cruise Control and plumbing the R134 A/C set up/
I'll try and get some pics up soon.
88xjlover- the manifold will bolt up but without the head you won't see much in performance gains.
BIGSLVRXJ
NAXJA Forum User
- Location
- Des Moines, Iowa
The Gates Belt I used was part number GAT K061000. IIRC I hardly had to tension it at all, so it worked out even better in the long run. Hope this is a nice contribution to the thread til I have time to do my write up.Bensride said:
-Collin
markaboo929
NAXJA Forum User
- Location
- Mooresville,NC
i swaped an 03 grand cherokke 4.0 in my 88 renix jeep- i used an exhaust manifold for an 95 jeep 4.0 and i stock 92 down pipe direct bolt in to the 88 cat 4 bolt flange- i used all the renix sensors except for the tps i used the tps for the 03 i just elongated an slotted the holes for the adjustment you do need to used an adjustable map adjuster to add input volts to the tps so it ghets a full 5 volts at wide open the renix an the 03 swing are different as the renix has a arm an the range is diff than the center on the 03 i used the oliginal fuel rail- returnless set up i simply used a fuel filter/regulator for the 03 motor- the reg is in the filter- it has the return to the tank at the filter i just used the returnless for the fact that cold fuel gets tio the motor instead of heated fuel from the lines going to the motor-benifit is better peformance.for the colant sensor i renmoved the plug on the d side of the block an bolted in there-as for the temp gauge i drilled an tapped the t stat housing on the snmall flat end facing the rad-no problem there- i did use an nv3550 trans so i used the original flywheel an crank sensor-i simply used a pilot bearing - not bushing- for an o3 wrangler with nv 3550- it runs awesome along with the help from a map adjuster for fuel ratio an i used a spark advance unit ment for gm ls1 v8s an buick g nationals-i can crank up ther timming way to hi as to cause a lot of pinging or retard it enough to barely run-i tunned it in onn a dyno an gained 18 rear wheel hp from timming an fuel ratio alone any questions i can answer please let me know- i have figgured everything for this an any renix issues- i am a master ase tech in the buisnes for 20 years now oh yeah by the way I AM NOT A TYPING PERFECTIONIST!!!
want2belifted
NAXJA Forum User
- Location
- AL
Does anyone have a picture of a 90 model XJ flywheel - i picked one up from a jy, but I do not think it is right. If you know how many notches should be on if for the CPS to read, that would help as well.
Slo-Sho
NAXJA Forum User
- Location
- The 2nd most regulated state.
The Renix flexplate has notches all the way around it with 3 double notches 120 degrees apart. The Chryco flexplate has several groups of notches.
jacked
NAXJA Forum User
- Location
- Torrington, CT
my XJ is a 90 Renix and i love it. it was stated above that installing an intake other than stock on a renix head will yield little results. what about the 99+ intakes? would that give any considerable torque gains due to the longer runners? i love the renix engine and dont want to swap to an HO head, i will be however shaving the renix head to gain some CR, probly around 9:1 and was thinking an isky mile a mor cam for even more torque. i would aslo need a p/s pump bracket from the same year intake correct?
jacked
NAXJA Forum User
- Location
- Torrington, CT
on another note, what year stock cam has the best torque?
downshift1
NAXJA Forum User
- Location
- the outer limits aka Socal
jacked- If you're going to spend all the money on shaving the Renix head and the manifold, you might as well get a complete HO engine. I paid $350 for a complete 01' engine.
This way you get all the bracketry you need and less miles, more hp and more torque.
This way you get all the bracketry you need and less miles, more hp and more torque.
jacked
NAXJA Forum User
- Location
- Torrington, CT
true, i know i can get a low miles engine for cheap localy. but i was under the impression that the renix engines had the best torque
purvisdotcom
NAXJA Forum User
- Location
- Hawaii
I am also sorry to bomb this relatively old thread. I have been reading these HO swap forums and my head hurts, but its great. Here is my situation:
I have a 89 comanche 5 speed 4.0L with 87k original miles, and trac-lock that I recently traded my hunting bow for(I love Craigslist). Has rust problem, so the bed is out and I am derusting everything now.
Found a 94 xj HO auto tranny 140k miles for sale (on CL again), settled on $200, it starts up but craps out after a few seconds. My original plan was to swap the radiators out, fix it and sell it for a profit, but now I am thinking of putting the HO head onto my comanche as well(with manifolds, TB, injectors, etc)
It seems from what Ive read that the head would bolt right on, and the change would be relatively easy, since I have all the 94 HO parts already and could leave the manifolds etc. on the HO head. The TPS I suppose would be the thing I would need to do a little fabrication, there are good articles on that already.
Long winded, but I guess my question lingering is would it be worth the effort for the benefit I would get. I am using this truck mostly for daily/work, but I will be going off road to get to those hidden Hawaiian beaches. The 89 renix has very low miles, so I know it doesn't NEED a new head, but then again when wil I have access to a cheap HO head and manifolds like this again.
Am I wrong that the head would bolt on easily with little modification? Is there a lot of benefit to swap the head out? The closest articles I have found to my situation is guys removing the whole engine and tranny and swapping it in.
Thanks Guys
I have a 89 comanche 5 speed 4.0L with 87k original miles, and trac-lock that I recently traded my hunting bow for(I love Craigslist). Has rust problem, so the bed is out and I am derusting everything now.
Found a 94 xj HO auto tranny 140k miles for sale (on CL again), settled on $200, it starts up but craps out after a few seconds. My original plan was to swap the radiators out, fix it and sell it for a profit, but now I am thinking of putting the HO head onto my comanche as well(with manifolds, TB, injectors, etc)
It seems from what Ive read that the head would bolt right on, and the change would be relatively easy, since I have all the 94 HO parts already and could leave the manifolds etc. on the HO head. The TPS I suppose would be the thing I would need to do a little fabrication, there are good articles on that already.
Long winded, but I guess my question lingering is would it be worth the effort for the benefit I would get. I am using this truck mostly for daily/work, but I will be going off road to get to those hidden Hawaiian beaches. The 89 renix has very low miles, so I know it doesn't NEED a new head, but then again when wil I have access to a cheap HO head and manifolds like this again.
Am I wrong that the head would bolt on easily with little modification? Is there a lot of benefit to swap the head out? The closest articles I have found to my situation is guys removing the whole engine and tranny and swapping it in.
Thanks Guys
this is a good thread ,i have a 89 renix which i love but i want a bit more power . i want to take a HO head that i have , deck it and do a little porting . and add a 99 intake but keep the renix TB ( just build a adaptor ) maybe even get the TB ported to 60mm. between the HO head and the intake it should gross me anywhere from 30 -50 hp .
Muad'Dib
NAXJA Forum User
- Location
- Bend, Oregon
Im looking for some advice...
I have a 1990 Cherokee Laredo (RENIX) that i have taken great car of since i got it. I have gutted the cat, changed all fluids. Moved it over to synthetic. Full tune up, replaced Oil adapter housing seals, oil pan gasket, removed centrifugal fan replaced with taurus fan, nice stereo, replaced most all sensors, new power / ground wires .. etc etc. I hit a deer so that made me replace alot also, so basically im sitting on all new parts except for the engine. It has about 190,000 miles on it. When i took the oil pan off, the bottom half of the engine looked very clean. I know the previous owner had just replaced the main seal not long before the sale, and i have replaced the front and also the harmonic balancer.
I know i have to replace the exhaust manifold soon, as it has a small crack in it. So my first question is, is there a nice BORLA, or similar aftermarket exhaust manifold available for the RENIX engine. If so, could you supply me with a link. I have done alot of searching without much luck on where i can actually get one.
Second question is, while im down that far it wouldnt be much farther to finish rebuilding the top half of the engine. Removing the Head and replacing the head gasket etc. I was thinking of going to my local junk yard (that fortunately has many XJ's) and finding a lower mile 87-90 4.0, and removing the head from it. Taking it to a machine shop, have them do there magic (port polish whatever else you recommend) and then installing it.
So here is where my questions come in. I want to get as much performance out of this engine as possible. At this point, should i go with a older RENIX head like i originally planned, or should i grab one from a low mile HO, and install it instead? What kind of machine work should i have done? Should i use the HO intake manifold as well, or stick with the renix? Some say that its not that difficult to switch the throttle body over just get one of those TPS adapters. Others say its hard. You have to replace cables etc.. I guess what im asking is what you guys recommend i should do since im already going to be down this far without replacing the block. Im going to replace the motor mount on this side also. Should i just have the machine work done on RENIX, or go with HO and if i do go with HO should i also go with the HO's intake manifold (hopefully i can fine a 97+
)
Thanks for your time
I have a 1990 Cherokee Laredo (RENIX) that i have taken great car of since i got it. I have gutted the cat, changed all fluids. Moved it over to synthetic. Full tune up, replaced Oil adapter housing seals, oil pan gasket, removed centrifugal fan replaced with taurus fan, nice stereo, replaced most all sensors, new power / ground wires .. etc etc. I hit a deer so that made me replace alot also, so basically im sitting on all new parts except for the engine. It has about 190,000 miles on it. When i took the oil pan off, the bottom half of the engine looked very clean. I know the previous owner had just replaced the main seal not long before the sale, and i have replaced the front and also the harmonic balancer.
I know i have to replace the exhaust manifold soon, as it has a small crack in it. So my first question is, is there a nice BORLA, or similar aftermarket exhaust manifold available for the RENIX engine. If so, could you supply me with a link. I have done alot of searching without much luck on where i can actually get one.
Second question is, while im down that far it wouldnt be much farther to finish rebuilding the top half of the engine. Removing the Head and replacing the head gasket etc. I was thinking of going to my local junk yard (that fortunately has many XJ's) and finding a lower mile 87-90 4.0, and removing the head from it. Taking it to a machine shop, have them do there magic (port polish whatever else you recommend) and then installing it.
So here is where my questions come in. I want to get as much performance out of this engine as possible. At this point, should i go with a older RENIX head like i originally planned, or should i grab one from a low mile HO, and install it instead? What kind of machine work should i have done? Should i use the HO intake manifold as well, or stick with the renix? Some say that its not that difficult to switch the throttle body over just get one of those TPS adapters. Others say its hard. You have to replace cables etc.. I guess what im asking is what you guys recommend i should do since im already going to be down this far without replacing the block. Im going to replace the motor mount on this side also. Should i just have the machine work done on RENIX, or go with HO and if i do go with HO should i also go with the HO's intake manifold (hopefully i can fine a 97+
)Thanks for your time
Mike1331
NAXJA Forum User
- Location
- Folsom, CA
Muad'Dib said:Im looking for some advice...
I have a 1990 Cherokee Laredo (RENIX) that i have taken great car of since i got it. I have gutted the cat, changed all fluids. Moved it over to synthetic. Full tune up, replaced Oil adapter housing seals, oil pan gasket, removed centrifugal fan replaced with taurus fan, nice stereo, replaced most all sensors, new power / ground wires .. etc etc. I hit a deer so that made me replace alot also, so basically im sitting on all new parts except for the engine. It has about 190,000 miles on it. When i took the oil pan off, the bottom half of the engine looked very clean. I know the previous owner had just replaced the main seal not long before the sale, and i have replaced the front and also the harmonic balancer.
I know i have to replace the exhaust manifold soon, as it has a small crack in it. So my first question is, is there a nice BORLA, or similar aftermarket exhaust manifold available for the RENIX engine. If so, could you supply me with a link. I have done alot of searching without much luck on where i can actually get one.
Second question is, while im down that far it wouldnt be much farther to finish rebuilding the top half of the engine. Removing the Head and replacing the head gasket etc. I was thinking of going to my local junk yard (that fortunately has many XJ's) and finding a lower mile 87-90 4.0, and removing the head from it. Taking it to a machine shop, have them do there magic (port polish whatever else you recommend) and then installing it.
So here is where my questions come in. I want to get as much performance out of this engine as possible. At this point, should i go with a older RENIX head like i originally planned, or should i grab one from a low mile HO, and install it instead? What kind of machine work should i have done? Should i use the HO intake manifold as well, or stick with the renix? Some say that its not that difficult to switch the throttle body over just get one of those TPS adapters. Others say its hard. You have to replace cables etc.. I guess what im asking is what you guys recommend i should do since im already going to be down this far without replacing the block. Im going to replace the motor mount on this side also. Should i just have the machine work done on RENIX, or go with HO and if i do go with HO should i also go with the HO's intake manifold (hopefully i can fine a 97+
Thanks for your time
I will answer all of your questions with a question. Do you or don't you require a egr in your area to pass smog. I'm going through this now. I have a 87 renix with a 93 head and had it rebuilt from a machine shop and swithced all intake accesories to the same year. Now all the intake has to come off so i can put that nasty egr back on to pass smog. If i were to do it again i'd take the HO head and keep the entire renix intake but bore out the throttle body to 59mm.
But the power gains fill great. At first when i did the swap the gains weren't to noticable but i switched oils added a custom down pipe with smooth bends and the motor really started to open up. The only bolt-ons i have are cone air and exauhst. The jeep is much faster than when I first bought it. I'm riding on 31's with stock 3.55 gears and can smoke most ricers on the street.
