Jump to content
Volvospeed Forums

Boxpin's Build


boxpin

Recommended Posts

How did the clutch hold up before the tranny gave way?

That kevlar disc looks an awful lot like my fibre-carbon one I just realised.

Apparently very well

First time I have seen that a gear broke on a M56. I assume this happen while in gear not on a force full shift?

It was a forceful shift. Second to third, the car started to pull for just a sec then boom

Link to comment
Share on other sites

Most of the damage I have seen has been ring gear, usually from 3000 RPM clutch dumps at the drag strip. First I have seen of the actual gears striping, but I am sure the Euro guys have seen damage like this before.

Usually if one tooth goes the rest will go if the car is still under power.

Link to comment
Share on other sites

  • 1 month later...

Rebuilding the turbo after my crop dusting event. I have been having BOV issues so I am switching to a Synapse Synchronic. I have been fighting compressor surge and believe this may have lead to the seal failure. So new BOV, billet wheel and anti-surge housing. I have not inspected the seal channel on the turbine wheel. If needed I will replace that as well.

FD3226F5-FCBD-4245-8769-EB993766AE67_zps

55CDB8CF-40C5-4DDF-8F50-A7E7D6DA0979_zps

Link to comment
Share on other sites

Faulty BOV / compressor surge will absolutely toast the thrust plate and subsequently the seals. My original problems arose firm trying to use a turbosmart Recirc - way to small of a dump for 20g or larger. You really can't go too large - it's precision is primary though. Need one that is absolutely tight under vacuum/ part load. I can swear by the Greddy RS in that regard.

Link to comment
Share on other sites

As far as I know, BOV related problem is only appears on the thrust bearing compressor side. If you have this kind of wear, then that should BOV fault. (there is an explanaiton if needed)

Mine was badly worn on the back side. Almost 1mm slivered out by the washer.
I'm assuming some scenarios what could caused back side worn in my case:

  • excessive backpressure in exhaust (3" race cat, revised stock muffler with 2.5" pipes inside directed in a much smoother "S" form)
  • running 22psi in this exhaust system
  • mismatched wheels by 20G hybrid, in operation the bigger cold side always pulls the little turbine wheel



This is Hussein's worn thrust plate
"front" side/ Compressor side

(mine has zero wear at here!! however I always had slight "compressor surge - flutter dump" - for a year, then massive flutter when new BOV installed with improper spring - two weeks only)
volvov70008.jpg

Link to comment
Share on other sites

  • 1 month later...

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...