Quote Originally Posted by Muzz View Post
I was just wondering if anyone who has stated this has any actual info to support their claims??
Turbo manurfactures all seem to state that the thrust loads on the shaft when the throttle is snapped shut, can cause accelerated wear of the thrust bearing. I havnt seen anything to prove or disprove this yet. Untill somone can show it dosn't, ill be listening to the people designing these products who say it does.
Quote Originally Posted by DLO01 View Post
I asked a turbo manufaturer/repairs workshop some questions in regard to Bov's and thier effect on Turbos. Hope this clears up any misconceptions or myths that we may have. This is their response:

I asked **** here the same questions as you've asked me, and although he has seen no 100% positive sign of damage due to no BOV, he still recommends using one for over 10psi of boost pressure when using a Ball Bearing turbocharger.

As for the BOV helping keep the turbocharger spooling, I can definately say this works, as turbocharger reversion would definately cause the turbocharger to reduce spool speed quite rapidly. There may only be a small difference in response time, but there is definately a difference.
This is the best sort of answer your gonna get i think. They way I see it, your gonna have more load on the shaft with more boost you have, so therefore you will get more wear. Simple.