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c21darrel
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PostPosted: Wed Jul 29, 2009 2:59 pm    Post subject: z-bar Reply with quote

I have a 68 ghia, switched to early short axles so I would have more rim /tire options. I am pretty sure the short axle changes just the outermost part, not the tube length.
Can/should i re-use the z-bar set up?
searched, couldnt find the answer.
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glutamodo Premium Member
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PostPosted: Fri Jul 31, 2009 8:47 am    Post subject: Reply with quote

When VW tweaked the suspension and added the Z-bar, they used 'softer' main torsion bars in back, and let the z-bar add more spring when needed (heavy weight in back, cornering, etc) so the two work together. I'd say to use it, but I'm not sure if there are any clearance issues though.

-Andy
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c21darrel
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PostPosted: Fri Jul 31, 2009 9:40 am    Post subject: Reply with quote

thanx for the info. Mocked up it looks like it should fit with the short axles.
popped off the torsion covers to paint. is there a trick to putting them back on? Bolt holes dont line up so "reverse of removal" isnt working.
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Corwin
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PostPosted: Fri Jul 31, 2009 12:06 pm    Post subject: Reply with quote

Fits fine - I have the same setup in my '68. Although I've been told by several in-the-know folks that you're better off ditching the z-bar and adding a kafer cup kit. Wink
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brent bousman
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PostPosted: Mon Aug 03, 2009 7:54 am    Post subject: Reply with quote

Keep the Z-bar as they work great.

An old racing trick we used to do - You can shim it a couple of inches with pipe so it will activate earlier.

For the covers you can use 2 longer bolts to draw the cover in close enough to put the original bolts in.
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c21darrel
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PostPosted: Mon Aug 03, 2009 11:21 am    Post subject: Reply with quote

i'll take a look to see where to shim so that it reacts sooner.

longer bolts, excellent idea. Thanks
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brent bousman
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PostPosted: Mon Aug 03, 2009 12:28 pm    Post subject: Reply with quote

Look at the end of the Z bar and notice how if you jack up the car it moves and takes up the slack until it gets to the end where the nut is. This slack area is where you can shim.

Since some of this is a "feel" so of course some like more slack and others even go with some pre load. To make it more simple to start I can get you in the ball park where I used to start about neutral. This means to set up a shim on a Z-bar, you start at the normal at rest stance. Shim from the end so that your normal setting is what the bar tries to maintain. Test by slowly jacking up the rear end of the car and watching how quickly the Z-bar ends are stressed.

Note that if you just jacked it up to look at it and dropped it back on the ground this stance is not the neutral at rest stance as you need to roll the car a little to get it to squat back to the normal stance.
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c21darrel
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PostPosted: Mon Aug 03, 2009 2:09 pm    Post subject: Reply with quote

Body and pan are still seperated. I have alot more rust repair than originally thought. When i get the two re-united i can get a look at how the z-bar acts w/ movement. Thanks for the info.
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