#7
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Quote:
In theory there is a way to take the wastegate actuator assembly apart and shim the spring in there to increase the WG opening pressure. But that would be a lot of work with the trial and error to get to the desired pressure. However -- I think one key is that you only need the cooling bypass air once the WG has begun to open and exhaust is flowing hot across the WG valve. If the WG is kept completely CLOSED by the use of a ball and spring, then the valve is in contact with its seat and can transfer heat there plus it's not exposed to continuous flow of hot gas. This was my logic at least in believing the common ball and spring type controllers would be fine for this type of turbo, as long as the plumbing (and the ball and spring themselves) were sized large enough that once air does begin to flow to the WG, it can flow at a high enough rate to help keep the parts cool. I hope my speculation is right.
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86 745 D24T/ZF 345k lifted 2.5" 83 764 D24T/M46 155k |
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