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Hi Scott,
I get 20 or 30 psi of vacuum at idle. It does get to 0 with full throttle.
I did some experiments with my MightyVac. I found that the bypass was stuck open from my last drive. I pushed it and it snapped back shut. I wasn't able to reproduce getting it stuck open with the MightyVac, but it doesn't close smoothly, either. One guy at Moss disables his just as a matter of principle. The down side is potentially lower fuel economy, and a little more wear on the blower bearings (they always turn, but not under much load when bypassed).
I can't tell were the mechanism is hanging up, either in the linkage, the butterfly or in the vacuum cylinder.
I'm going to do some tests with the bypass disabled.
I was thinking maybe I would add a manual control of the bypass, and use it long long trips, and when the kids want to use the car .
I get 20 or 30 psi of vacuum at idle. It does get to 0 with full throttle.
I did some experiments with my MightyVac. I found that the bypass was stuck open from my last drive. I pushed it and it snapped back shut. I wasn't able to reproduce getting it stuck open with the MightyVac, but it doesn't close smoothly, either. One guy at Moss disables his just as a matter of principle. The down side is potentially lower fuel economy, and a little more wear on the blower bearings (they always turn, but not under much load when bypassed).
I can't tell were the mechanism is hanging up, either in the linkage, the butterfly or in the vacuum cylinder.
I'm going to do some tests with the bypass disabled.
I was thinking maybe I would add a manual control of the bypass, and use it long long trips, and when the kids want to use the car .