Wastegate failure protection circuit
#41
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I've never seen this happen before and I've had plenty of experience with the turbo Buick crowds back in the day. 2 seconds seems like a long time to stay in it when it doesn't feel right. I did search to see if I could find anyone who over spun their turbos to destruction and I just don't find that many. I wonder how common it is. I've had many a tube come off early in my prototype twin turbos but always seemed easy and quick to recognize.
#42
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If the car is equipped with a 2 step controller, have the hobs switch trip the signal wire, say you have two step at 4500 rpm, you would pretty much notice it right away and let out, if that's not good enough, have it go to a relay that interrupts signal to the crank sensor which would then shut down the engine right away.
I still like the idea of cutting fuel and spark with the hobbs switch or cutting fuel within the VE table... or both.
#44
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I have tial wastegates and they've locked up on me before. Found that the main valves in them tend to get a coating on them. I believe it's a combination of the iron manifolds and the fact that at times I start the motor and don't let it fully warm up. That along with the race gas seems to cause the issue. If I clean them and use a proper high temp anti-seize the problem doesn't happen. Everyone else uses them and they have no issues. I'm the lucky one I guess. I check for proper operation before every race and have had no issues since.