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  #21  
Old November 10th, 2012, 01:16 PM
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Longer trailing arms = more articulation
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  #22  
Old November 10th, 2012, 02:22 PM
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Quote:
Originally Posted by Buckon37s

Hey,

Sweet! I got a shoutout on D-90 in 2012! I feel warm inside!

I miss my truck.
We're getting intimate, uh?

I miss your truck too, the new owner is not even a member of this board...
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  #23  
Old November 11th, 2012, 01:40 AM
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Quote:
Originally Posted by sonoronos View Post
Dave, do you know of a limit on how far the rear axle can be pushed back before the A-frame or A-frame ball joint needs modification? I'm assuming this moving of the rear axle is done with longer rear trailing arms. I guess I just realized that if one can buy a few inches in the front, one could also buy a few in the back.
Hi,

I think it depends on what you are expecting the truck to do. When you make the a-arm assembly longer you are decreasing the angle of horizontal separation. This will make the stress the upper joints see go up. That said, I moved mine back 10in. The joint is remarkable. Never had an issue. I did however, rip the a-arm off the frame side. I had to rebuild the mounts. All in all, it was stout.

Just as a tip in general, if you can find a way to add triangulation into the lower arms, your roll axis angle drops and your truck will drive REMARKABLY better. Cheers

------ Follow up post added November 11th, 2012 06:40 AM ------

Quote:
Originally Posted by Cube II View Post
We're getting intimate, uh?

I miss your truck too, the new owner is not even a member of this board...
I know. Mike. He's nuts. He has rolled it twice already.

------ Follow up post added November 11th, 2012 06:42 AM ------

Quote:
Originally Posted by Hoosier View Post
Longer trailing arms = more articulation
Yes, the math is settled. But in this application, not really. You can't make them long enough to make a difference.
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  #24  
Old November 11th, 2012, 02:51 AM
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Quote:
Originally Posted by Hoosier View Post
Devon 4X4 makes an extended trailing arm and A-arm extender for their trayback kit which will give you a 100 inch wheelbase. Problem is the rear fuel tank. You would have to extend the frame and tub - or lose the tub and build a trayback.
Here

http://www.devon4x4.com/index.php?op...uild&Itemid=41



Ed's truck has a side mounted fuel tank so that's not a problem.
A three point linkage gives lots of front articulation.
Shortening the front chassis bumper mounts improves the approach angle.

Here's the link for the 110 also very cool in the flesh

http://www.devon4x4.com/index.php?op...back&Itemid=46
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  #25  
Old November 11th, 2012, 08:55 AM
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Quote:
Originally Posted by Buckon37s View Post
Hi,

Yes, the math is settled. But in this application, not really. You can't make them long enough to make a difference.
Back when my white and yellow 90s were set up, both with rear coilover shocks. The white had stock trailing arms and the yellow had lenghtened trailing arms (new mounts welded to the frame - 8" longer arms). The yellow could most assuredly out-articulate the white and by a large margin.
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  #26  
Old November 11th, 2012, 12:47 PM
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Quote:
Originally Posted by Hoosier View Post
Back when my white and yellow 90s were set up, both with rear coilover shocks. The white had stock trailing arms and the yellow had lenghtened trailing arms (new mounts welded to the frame - 8" longer arms). The yellow could most assuredly out-articulate the white and by a large margin.
So your talking rear lower links, and not front radius arms? If thats the case, it definately doesn't make a difference. Unless you mounted a hiem on the extended ones and are confusing the bind you felt with the lenth you added. It will help with the rear steer, but will cause your pinion to lower at droop and limit what your driveshaft will accept.

My new buggy has 30in front links, and 18in of travel and rediculous articulation.
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  #27  
Old November 11th, 2012, 01:30 PM
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Did have heim joints
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  #28  
Old November 11th, 2012, 09:49 PM
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Quote:
Originally Posted by Hoosier View Post
Did have heim joints
Yep,

It didn't have anything to do with lenth. You even raised your link mounts, which will offset your change.

BTW, if you still have that truck, a few changes to the lower links would make it handle way better and limit the rear axle steer you get. I can send you an excel sheet with the numbers if you want.
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  #29  
Old November 12th, 2012, 07:25 AM
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Actually, the 90 drove great - high speed daily driver (supercharger). Multiple cross country trips to Colorado and Moab back in the 90s, where it did pretty much everything without an issue and then drove back home. Now it's a 110.
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  #30  
Old November 12th, 2012, 09:33 AM
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Quote:
Originally Posted by Hoosier View Post
Did have heim joints
What's up front? 3-link?
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  #31  
Old November 12th, 2012, 11:16 AM
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Quote:
Originally Posted by Hoosier View Post
Actually, the 90 drove great - high speed daily driver (supercharger). Multiple cross country trips to Colorado and Moab back in the 90s, where it did pretty much everything without an issue and then drove back home. Now it's a 110.
I thought mine drove great. Till I fixed it. Then I thought it was really great, till I drove a car set up really well. I thought that was amazing. Till I drove a car set up near perfectly.

Anyway, the 110 in your avatar looks great!
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  #32  
Old November 12th, 2012, 12:30 PM
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Quote:
Originally Posted by Buckon37s
I can send you an excel sheet with the numbers if you want.
I would be interested in seeing that sheet. A while back I saw a worksheet that required many different specs that require putting the truck on a scale and what not but since mine is still in parts there was no way for me to figure that out. If you have the info, presumably for a 90, I would love to see it. FWIW I'm working on a 100".

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  #33  
Old November 12th, 2012, 04:03 PM
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Quote:
Originally Posted by fishEH View Post
What's up front? 3-link?
That was before 3-link existed - at least before it existed for defenders.
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  #34  
Old November 12th, 2012, 04:25 PM
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Hoosier, what magic did you have up front?
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  #35  
Old November 12th, 2012, 04:48 PM
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  #36  
Old November 12th, 2012, 07:30 PM
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Quote:
Originally Posted by sonoronos View Post
Hoosier, what magic did you have up front?
Dual 12" fox shox on each side, one position sensitive. Dual rate 89 RR rear springs on the front if memory serves. Nothing else. Rear was 14" fox coil-overs (dual-rate setup) using a modified SG upper shock mount.
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