SSwan60@aol.com writes:
>Looking around I then noticed that twelve years ago I had placed 3 shims
>between the rubbered engine mounts and the block outriders on each side.
That could force the uprights outwards - and even a small amount
will affect the camber.
>removed these shims, put everything back together and jumped up and down on
>each side ten times to settle everything in place. I then tried to find a
It may require some driving around before everything adjusts to
the changed forces on the frame. Probably not much, though.
>wheels did appear to be at 0 degrees. I even brought it by my local Triumph
>Guru’s house (that’s you Greg) and he confirmed my conclusion that they
>appeared at 0 degrees.
That's a good start - a lot better than positive. But is that
still with 1000 shims installed?
>I’m skeptical of all this. How does taking some shims out of my engine mounts
>affect my camber?
By forcing the mounting points outwards (since the engine doesn't
compress well). This tilts the uprights that come up from the frame.
>Let’s review: First the alignment shop tech. tells me he can’t correct the
>positive camber because he ran out of bolt, he even says he has attempted to
>align other LBC’s with similar results. I’m assuming his set up is much more
>accurate than my framing square technique.
Accurate tools used by a bozo are useless. When I had a chain
repair/tire shop align my TR6, when I came back he said there was no way to
reduce the positive camber. I said "put those shims I gave you here and
here and it moves the lower a-arm out", and he said "how would that help?
I need to adjust the upper mount and it doesn't adjust." !!!! I finally
convinced him it would help, and he did it, and got them within spec. He
had accurate tools, but no real knowledge of geometry or for that matter
how cars really work. And no, he wasn't an 18-year-old, just a bozo.
>Any more thoughts on this?
Too-high springs (because of reduced weight or too-long free length
or too-high spring rate (for the free length)) will generally cause
positive camber for most british-car suspension geometries. Did you
replace the old springs with new ones that raised the car up a little,
perhaps?
I don't know Spit/GT6 frame specifics - is the front lower
crossmember perhaps bowed up from being used as a jacking point? That
would pull the frame rails (and lower front suspension mounting points)
together.
--
Randell Jesup, Scala US R&D, Ex-Commodore-Amiga Engineer class of '94
Randell.Jesup@scala.com
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