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Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Mon Sep 18, 2023 6:28 am
by Yeller
4-5" of up travel is plenty. Even on offroad stuff it is sufficient. Proper shock valving makes all the difference.
Proper shock valving typically just means not going with the cheapest bottom rung shock. My go to's are anything from KYB or Bilstein.
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Tue Oct 03, 2023 8:44 pm
by SJohn
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Mon Oct 09, 2023 7:55 pm
by SJohn
Working on a quick mock up of the links in CAD tonight to get a visual and idea of how this is all going together. So far its looking good but has got me thinking about whether I'm going to make my own link mounts or use some off the shelf mounts. Next up is to get the frame set up again at ride height and start measuring it out to see what adjustments need to be made to the links and where they'll mount on the frame.
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Mon Oct 09, 2023 7:57 pm
by SJohn
A side profile:
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Mon Oct 09, 2023 8:22 pm
by Yeller
Looking good
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Sat Dec 02, 2023 4:57 pm
by SJohn
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Sun Dec 10, 2023 6:13 pm
by SJohn
Finally making some engine progress! The crank is back in the engine, main bearings and thrust clearance all checked well within spec. I decided to invest in a bore gauge and micrometer for this and learned alot in this process. I feel much more confident than just using the plastigauge. Now starting to order parts for rod and piston install. If anyone has any insight on rod/piston balancing id love to hear it.
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Sat Jan 06, 2024 10:55 am
by SJohn
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Mon Feb 12, 2024 7:59 pm
by SJohn
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Mon Feb 12, 2024 10:53 pm
by Stuka
Where are you going to fit in the track bar? Or perhaps a watts link?
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Tue Feb 13, 2024 5:19 am
by SJohn
Stuka wrote:Where are you going to fit in the track bar? Or perhaps a watts link?
No trackbar or watts link needed. This will be a triangulated 4 link.
Sent from my SM-S911U using Tapatalk
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Tue Feb 13, 2024 7:24 am
by Yeller
If using bushings install the lower links first so you can swing the axle around to get the bolts in, then install the uppers. I've had to do that many times. The alignment will need to be way off for it to be an issue, factory stuff is terrible LOL. If you're using a Johnny Joint or equivalent it won't matter at all, the ball will self align.
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Tue Feb 13, 2024 7:35 am
by Stuka
SJohn wrote: ↑Tue Feb 13, 2024 5:19 am
Stuka wrote:Where are you going to fit in the track bar? Or perhaps a watts link?
No trackbar or watts link needed. This will be a triangulated 4 link.
Sent from my SM-S911U using Tapatalk
I was wondering if thats what you were going for, just didn't look to be enough triangulation for that. But could just be the angle of the photos making it look like less than it is.
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Tue Feb 13, 2024 8:54 am
by Yeller
Stuka wrote: ↑Tue Feb 13, 2024 7:35 am
SJohn wrote: ↑Tue Feb 13, 2024 5:19 am
Stuka wrote:Where are you going to fit in the track bar? Or perhaps a watts link?
No trackbar or watts link needed. This will be a triangulated 4 link.
Sent from my SM-S911U using Tapatalk
I was wondering if thats what you were going for, just didn't look to be enough triangulation for that. But could just be the angle of the photos making it look like less than it is.
I used to think that too until I started studying chassis of all types, the least triangulated I could find are monster trucks. If they can get away with the angles that they do, with the abuse and loads they put them through, this is way sufficient. I don't remember the angles they use, its been years since I did that, single digits is what I remember.
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Tue Feb 13, 2024 9:37 am
by SJohn
Yeller wrote:Stuka wrote: ↑Tue Feb 13, 2024 7:35 am
SJohn wrote: ↑Tue Feb 13, 2024 5:19 am
No trackbar or watts link needed. This will be a triangulated 4 link.
Sent from my SM-S911U using Tapatalk
I was wondering if thats what you were going for, just didn't look to be enough triangulation for that. But could just be the angle of the photos making it look like less than it is.
I used to think that too until I started studying chassis of all types, the least triangulated I could find are monster trucks. If they can get away with the angles that they do, with the abuse and loads they put them through, this is way sufficient. I don't remember the angles they use, its been years since I did that, single digits is what I remember.
The upper links are about 22 degrees and lower links are about 10 degrees.
Sent from my SM-S911U using Tapatalk
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Tue Feb 13, 2024 9:47 am
by Yeller
Combined that 32. Most of the OEM designer/Engineers I’ve spoke with say 30 degrees is the magic number. GM A bodies were 30.
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Sun Mar 10, 2024 10:17 am
by Pressingonward
You asked for tips on rocker replacement. I've got nothing, but this thread is a gold mine for bodywork and the theory behind sheet metal work:
https://www.garagejournal.com/forum/thr ... ts.182565/
As well as this related one that is a little more on-topic:
https://www.garagejournal.com/forum/thr ... els.53534/
Re: 1981 Cherokee Chief - Rustard - 2WD 2JZ
Posted: Mon Apr 22, 2024 8:37 pm
by SJohn