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Help me set up my narrowed link pin front beam! (please)
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IntrstlarOvrdrve
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PostPosted: Wed Feb 13, 2013 7:47 am    Post subject: Help me set up my narrowed link pin front beam! (please) Reply with quote

I posted earlier about narrowing my torsion leaves for a 4in narrowed beam. I have decided to leave them uncut until I set my front end up so I can make sure that it is within the limit of my shim packs (per drscopes advice). I have read through the following thread:
http://www.thesamba.com/vw/forum/viewtopic.php?t=295861

I have a 4in narrowed beam from a supplier that advertises on the samba. I have 2.5in drop spindles and disc brakes for the front. My question is, will the body being off the car affect the camber all that much? And what offset do I need to set it to per the chart on Chircos website?

Image may have been reduced in size. Click image to view fullscreen.

(Disclaimer: I'm a complete newb at this, just trying to wade through information and get my car right Laughing )
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drscope
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PostPosted: Wed Feb 13, 2013 9:01 am    Post subject: Reply with quote

When the car is assembled, you measure the distance between the parallel faces of the trailing arms. Then depending on what that distance is, you use the shim chart to place the correct number of shims in the correct location.

What you are attempting to do is to get the link pin bushing in the spindle carrier square with the faces of the trailing arm.

Camber is PRE-SET by the angle in the spindle carrier casting and can NOT be changed with the shims.

So what you are attempting to do now is to get the location of your trailing arms on the leaf stacks so that the faces on them fall with in the chart.

The location of the trailing arms is determined by where you make the dimples in the leaf stack.

So dimple location is CRITICAL on a king & link pin car.

Having the body off the car or no load on the chassis should have NO effect on the set up.
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IntrstlarOvrdrve
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PostPosted: Wed Feb 13, 2013 9:30 am    Post subject: Reply with quote

I have filed the ends of the arms down so that they slip all the way over the leaves, I am going to set it all up and then cut/dimple the leaves accordingly.

I'm still confused about how many shims to put where though, how do I measure how much offset I need?
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Culito
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PostPosted: Wed Feb 13, 2013 10:30 am    Post subject: Reply with quote

IntrstlarOvrdrve wrote:
I have filed the ends of the arms down so that they slip all the way over the leaves, I am going to set it all up and then cut/dimple the leaves accordingly.

I'm still confused about how many shims to put where though, how do I measure how much offset I need?

Don't worry about the spindle at the moment. This is what I did:

Press the trailing arms firmly into the beam, so that the seals can do their job. You might use a bungee or something to keep light tension between the arms and the seals, if necessary.
Aim for a 7mm (middle of the range) offset between the upper and lower arms. From another site:
Before fitting the torsion arm link assembly, the offset of the torsion arm eyes should be measured. To do this place a steel straight edged rule squarely on the bottom torsion arm eye and measure the distance between the rule and the top eye. The standard measurement should be 7mm, with a permissible deviation of +/- 2mm.

Once you get the arms positioned correctly with some tension on the seals, carefully mark where the dimples should be. You won't get it exactly right, so use the chart to adjust the shims accordingly.
Good luck.
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IntrstlarOvrdrve
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PostPosted: Fri Feb 15, 2013 11:17 pm    Post subject: Reply with quote

Ok, I measured and the passengers side is 7mm, and the drivers is 9mm. It is ok to cut the leaves with this in mind?

Going by the chart, on the passengers side I will need 3 shims on A and C and 5 on B and D. Then drivers will be 5 on A, 3 on B, 2 on C and 6 on D?

Just out of curiousity, what would I do if the offset was more than the +-2 tolerance?
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Culito
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PostPosted: Sat Feb 16, 2013 1:05 am    Post subject: Reply with quote

IntrstlarOvrdrve wrote:
Ok, I measured and the passengers side is 7mm, and the drivers is 9mm. It is ok to cut the leaves with this in mind?

Going by the chart, on the passengers side I will need 3 shims on A and C and 5 on B and D. Then drivers will be 5 on A, 3 on B, 2 on C and 6 on D?

Just out of curiousity, what would I do if the offset was more than the +-2 tolerance?

You'd have to scrap the whole bug and start over.
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Joey
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PostPosted: Sat Feb 16, 2013 6:44 am    Post subject: Reply with quote

The chances of your measurements being the exact same after you drill the dimples in the leaves I think are going to be slim. I remember my first narrowed beam I built was a bit off and I had an offset of 10 mm on one side. I just added shims until the link pin carrier was sitting flush with the face of the arms and there was no binding.
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IntrstlarOvrdrve
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PostPosted: Sat Feb 16, 2013 7:37 am    Post subject: Reply with quote

Laughing

Well, as long as I'm on the right track, I'll cut them and dimple them today
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vaughn bros.
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PostPosted: Sat Feb 16, 2013 9:47 am    Post subject: Reply with quote

IntrstlarOvrdrve wrote:
Laughing

Well, as long as I'm on the right track, I'll cut them and dimple them today


Many of us have had to get that first dimple under our belt. Very Happy
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