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When you don't run a BOV or compressor bypass valve (which just reroutes the air to the inlet side of the turbo and doesn't "woosh") what it really does is to screw up the thrust bearing on the shaft. My understanding is that if you have ball bearing turbos they are not affected (or not as much) as ...

I am looking for members of Toyotapowered and Club4AC. Now that both of those forums are gone, I have started a new forum for the 4AC and related single cam engines. This one is actually moderated and maintained so there should not be any Club4AC type issues We have a pretty cool build 4AC build goi...