the Dune Buggy Archives
DBA Forum - Not logged in
Previous Next Up Topic Public / Dune Buggy Build Advice / IRS Camber adjustment. (7958 hits)
By Larry G 3220 Date 2012-06-08 00:48
I have a Meyers Manx SR one of the POs added some significant negative cambered to the rear axle. This is a 1969 pan not swing axle, it is IRS. The rear torsion bars had been set to 15 degrees preload to lower the rear end. I've increased that to 19 degrees to raise it some. Raising the rear end had no effect on the negative camber.  I've done some searching and found a couple of methods to change the camber, swap control arms, and rotate the outboard axle housing on the spring plates. Possibly notching the spring plates for additional rotation. Does anyone have definitive solution to adding camber to the rear wheels?

Thanks,
Larry
By Brad H 1498 Date 2012-06-08 01:01
Rear camber on a Beetle is -1.7* +-.3*. It may look like a lot depending on how big your tires are,but trust me, negative camber in the rear is a good thing, you DO NOT want positive camber. All the methods you describe require cutting an welding of the rear dog legs either to relocate the shock mounts or the bearing housings. The shock mounts will be no big deal. but unless you REALLY know what you are doing you don not want to mess with the bearing housing. Precise measurements are a must and being that close to the center of the axle it will take nothing to be off by 1 or 2 degrees. Notching the spring plates will raise the car more than it will change the camber.

brad
By Larry G 3220 Date 2012-06-08 14:23
I'm not against negative camber. I just don't need as much as it appears there is/was. I'm going to post a pic of the current rear axle looks with new tires. I'm also attaching a pic of the old tire I took off, which is what I trying to avoid. I'd like to see about half the wear that appears on the old tire. You maybe right it just looks more than it is. I checked the angle with a pitch gauge and I'm seeing not more than 2 degrees.

Larry

Attachment: P6071100.jpg (110.0k)
Attachment: P6071098.jpg (136.1k)
Attachment: P6071097.jpg (128.9k)
By Jeffrey P 655 Date 2012-06-08 17:22
Doesn't look like alot for an old VW.
By Larry G 3220 Date 2012-06-09 00:29
You may be right. I'd swear that it is double what it should be, but the pitch gauge says 1 degree. I'm going to put a smaller steering wheel on it with a extender on the pitman arm. Then I'll take in and have it aligned and the rear wheels checked for camber. I went from 15 degr4ees preload to 19 degrees maybe that corrected it enough. I wouldn't think that on an IRS it would we'll see.

Thanks for your support.8-]

Larry
Previous Next Up Topic Public / Dune Buggy Build Advice / IRS Camber adjustment. (7958 hits)

Powered by mwForum 2.10.2 © 1999-2007 Markus Wichitill