[s-cars] Was :Tramlining Exits Stage Left --Now: slotting upper strut moun t

[Robert Pastore]

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Fred:

Slotting the uper mount has been a popular mod to get more camber adjustment
range, but I have found that it really doesn't work.  The problem is that,
by design, the center of upper mount casting drops into the hole in the
center upper plate (the plate we redrill per the  Igor/Perter Blaser mod),
and the range of the stock slots is exactly equal to and is limited by
interference between the size of the hole in the upper strut plate and the
"drop down" section of  the casting on the upper strut mount.  To acheive
the intended extra adjustment range, in addition to the slotting normally
performed, you need to grind some casting material away from the center drop
down on the bottom side of the upper mount and also grind and re-radius the
center hole in the upper plate.

Bob

-----Original Message-----
From: Fred Munro [mailto:munrof at sympatico.ca]
Sent: Wednesday, July 09, 2003 7:54 PM
To: s-car-list at audifans.com
Subject: [s-cars] Tramlining Exits Stage Left



I just completed a suspension rebuild on the UrS4, had it aligned, and the
moderate tramlining that went with the 225 skins seems to be gone.

I had the four wheel alignment done at the local dealer, and I must say it
is the most thorough alignment I have ever had done.
Of course the right front strut wouldn't dial in on camber, so the tech
suggested he slot out the upper plate a bit. OK - go for it. Still didn't
come in, so he says "I'll have to shift the subframe to get the camber and
caster in on that side - is that OK?". Well, I guess so! He moved the
subframe over and the right side came in at -0.8. He matched the left side
camber to the right side and set the toe to spec. Because both sides are on
the negative side of the spec and the toe is at spec, I suspect it's a bit
toed-in at speed which seems to have cured the tramlining problem.

The steering wheel is dead centre too!

I am pleased.

Fred Munro
'94 S4


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