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      11-05-2009, 11:34 AM   #44
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Exclamation

Time for an update -


Turbo Dynamics have sent over more pictures today showing the state of wear around the wastegate crank arm and the bush. The first picture shows the amount of scoring that has happened on the arm itself - a sign that there is premature wear going on. The two after show the actual wear in the bush itself.

Scoring to crank arm

Name:  Scoring to crank arm - small.jpg
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Wear between crank arm and bush

Name:  Worn bush around crank arm - small.jpg
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Wear between crank arm and bush

Name:  Wear between crank arm and bush - small.jpg
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The next two pictures show the work done on the turbine side of things. TD have done a little fabricating to re-profile fractionally the exhaust turbine wheel in order to lighten the wheel for faster spool up, and also to decrease back pressure.

Re-profiled turbine wheel for lightness and back pressure reduction

Name:  Cutback turbine wheel to lighten and relieve back pressure build up - small.jpg
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New wheel installed in overhauled compressor housing

Name:  Compressor housing with new wheel after being re-profiled - small.jpg
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TD spent the rest of yesterday and most of today (12 hours total) fabricating a jig in order to allow them to balance the turbos. They also had to custom make oil fittings for these turbos. Fortunately they'll be keeping this new jig so that other people in future can have their turbos overhauled in a shorter time!

Bespoke balancing jig after 12 hours of machining

Name:  Bespoke balancing jig after 12 hours of machining - small.jpg
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Bespoke oil fitting for VSR balancer next to original

Name:  Bespoke oil fitting for VSR balancer  next to original - small.jpg
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There's still a fair bit to be done, and I'll have more pictures and information as and when it comes through! Am fairly excited it has to be said!