Re: Spiders to date - specific sites

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <0.4f6f88bf.253361d9@aol.com> QSHIPQ@aol.com writes:

> *  Phil, by "alignment at the track" - I mean that I have available to me, a
> full 4 wheel alignment machine in a garage 500ft from a 1 mile road course.
> A course, btw, that immediately after a "proper" 4 wheel 44 alignment,
> promptly bit my ass on dry pavement.

We'll have to see how 'proper' it was - see below.

> *  Phil - Please post up the "proper" specs used by your shop, that's easily
> repeatable.  Also the "before" printout might be useful.  If your "shop"
> considers that proprietary (?), how bout narrowing the range for us.  I've
> done and/or supervised dozens of alignments, I find just the correlation of
> spider bite to alignment to be somewhat intriguing.  I follow the logic that
> a misaligned car might be *more* prone to bite, but can't jump with you that
> a properly aligned car won't bite at all.  You may want to read Dave E's
> 'referenced' SAE 885140

Agreed.  The BEM Muller rig doesn't produce printouts - it's a purely
optical device with Vernier adjustments.  BR Motorsport use a Snap-On
alignment ramp to lift the car and then each axle in turn while
everything is 'relaxed' and zeroed.  The actual measurement turntables
and the ball race relaxers are French.  Martin takes about forty minutes
mounting the wheel brackets and zeroing them to allow for any wheel
distortion, etc.

I _may_ see him tonight at the Area E meeting, in which case I'll ask
what values he uses.  I do know that he always aims for specific
values, not just within tolerance.  Bear in mind also that there is a
serious error in the ur-quattro alignment specifications that was
revised by a Technical Bulletin - at least one of the 'programmed laser
rigs' in use in the UK uses the old (incorrect) values.

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone: 07785 302803   Fax: 0870 0883933