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I certainly get a "whoosh" with my auto, but >
Posted by Bill Davies (more from Bill Davies) on Thu, 12 Sep 2002 11:38:18
In Reply to: Is all of this true with an auto as well?..., Joe98, Wed, 11 Sep 2002 11:34:20
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it happens when I let off the throttle and the BPV is doing its job of dumping the pressure.
Maybe it's like this. In a manual car, people tend to come off the throttle as part of the gear-changing process. When you shift automatically, you are probably not easing the throttle very much, hence no whoosh. If you ease your up changes through (as you may wisely be doing, with the torque you are stuffing through your gearbox) you might hear it – but as you would just be easing back on the pedal, not coming right off the gas, you still might not trigger the valve.
If changing down a gear, you are presumable feeding more gas and would not expect a whoosh anyway. The manual equivalent is a racing change.
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