Quote:
Originally Posted by vetteflier
I don't understand "full throttle slams the valves closed." There is no mechanical way this could happen. The valves rotate on the vertical axis upwards to horizontal. The lower part is slightly in the exhaust stream, so flow would push it outward=open, if anything. For them to close, you would have to have much greater flow at the much smaller inward side of the valve.
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All I know is I manually pulled both servos from the car. left then off. and opened the valves to wide open.
The car sounded great while I was warming it up once the cold start stopped rattling the valves.
Around town it was deep and nice.
Once warm I put it in s+ and layed on it suddenly it had this strange howl to it that I had never heard and was much quieter than I'm used to at full throttle.
I took it out of sport and back to efficient and the car was dead silent as if the valves had shut themselves.
Again I completely removed the servos for my test.