I have a 92 xj as a donor and want to but the intake and exhaust onto my 90 xj how hard is that

 

Not worth it for all the work.

HO myth buster


Renix in 90 made 182 HP. HO in 91 made 190 HP. That's 8 HP difference.

HO only made more HP than Renix at higher RPMs and not a bit more torque. HO had 58 mm throttle body versus a 52 mm throttle body on a Renix and also had a better design header. See where I'm going with this?

The whole 8HP was not mostly from the head, but from the bigger TB and better exhaust manifold.

Put a 60mm TB from www.strokedjeep.com on your present head, eliminate the "crush" in your headpipe with proper re-routing, and go for it.

HO stands for Highly Overrated.
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I didn't think that it was all that hard to do but it does take a little bit of time. The only part that is a bit tough is the TPS. Hesco makes an adaptor that you can just buy but it is stupid expensive for what you get in my opinion so I made my own. You will need the throttle cable and if auto, the tranny kickdown from your donor. Also the power steering bracket is not the same. That is all that I can think of off the top of my head. There is a good thread on here from someone else that did it but I don't remember it off the top of my head so just search for it.

If you decide to do it and run into issues just post back and I will try to help. I honestly have no clue if it is worth it or not. I did it on my stroker when I got it running so I never had my renix intake on to compare it to to see if I felt a difference.

 

So much easier to just get a 60mm throttle body from www.strokedjeep.com for about $100.

 

So let me get this straight, you are saying that the 7 bolts on the TB is easier than my custom setup? How rude of you. It only took me a full day. Fine.... Really a full weekend and 3 trips to the junkyard to get mine on...... Easy p-easy Cruiser come on!

 

6 bolts on a Renix......

3 for the intake tube and 3 for the throttle body.

Oh yeah, 4 more for the IAC and TPS......