turbocharger repair - ripped off!

[nacelp]

Speaking of ultra fangleing.  In a visit to where some hot tractors live, I
saw a set of razor blades mounted in a fixture, similiar to what I used for
slot car motors (in HS), but much wider.  Also, the guy claimed to do his
own turbos.  I didn't see any high rent balancing eqipment anywhere.  I have
wondered if this was his balancing rig.  His problems were driving over the
crank, not turbo durability.
Grumpy

> -> Blimey in Perth we are being ripped off big time. To replace bearings
> -> and balance on the latest "VST" dynamic balancer is around A$800
> -> *and* on a 'care but no responsibility' clause.
>  You'd save money shipping them to the USA!  Better yet, buy a balancing
> machine and undercut the competition; given those prices the profit
> margins could still be fat.
> -> They say their balancers cost around A$35,000 each (blah) (blah),
>  The one the local turbo place uses is a desktop version of my engine
> balancer - ball bearing rollers, a drive belt, and a strobe light.  New
> engine balancers are around US$15K, I'd expect the turbo balancers to be
> a lot cheaper.  Someone swift with electronics could probably just make
> his own.
> -> I'd be interested in building my own turbo balancer - shouldn't be
> -> that hard - any comments on this ?
>  The common type uses two leaf springs.  One end is fixed to the frame,
> the other has a block with a pair of ball bearings.  From that end a rod
> runs down to a voice coil arrangement to measure displacement.  The
> shaft spins up to its critical speed, displacement is shown on an analog
> meter, and the strobe is triggered, phase-shifted to show at maximum
> displacement.  I spent several days poring over the manuals for my big
> Stewart Warner machine; I couldn't believe how simple it was, and kept
> looking for the gotchas...
> -> I used to use a bath of penetrating oil with an ultrasonic transducer
> -> underneath - works wonders - though *don't* use if with aluminium ;-)
>  It's the exhaust housings that are all the problem.  I use high temp
> antiseize and stainless steel bolts when I reassemble them.
> ==dave.williams at chaos.lrk.ar.us======================================
> I've got a secret / I've been hiding / under my skin / | Who are you?
> my heart is human / my blood is boiling / my brain IBM |   who, who?
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