Instrument cluster vacuum meter reaction time?
My '67 Barracuda has the vacuum meter option. It's not currently connected to the engine because all the tubing is shot. However, while I had the dash out to replace the instrument voltage regulator, I tested the vacuum meter with a hand operated pump. The needle moves, but verrrry slowly, much slower than would seem to be useful for when you put your foot into it and want to see it drop into the "performance" range (as if the original /6 really had a "performance" range, but I digress).
I had an idea of how it should operate, but the gear reduction it's impossible to really see any physical change in the what I'll call the bellow. When I pull 25lbs vacuum as indicated on the pump, the meter slowly creeps up to 10. Maybe if I keep holding vacuum long enough, it would go higher, but my hand is cramped by this point. When I release the vacuum it takes nearly a full minute to drop back down to 0.
How fast should I expect the meter react?
My '67 Barracuda has the vacuum meter option. It's not currently connected to the engine because all the tubing is shot. However, while I had the dash out to replace the instrument voltage regulator, I tested the vacuum meter with a hand operated pump. The needle moves, but verrrry slowly, much slower than would seem to be useful for when you put your foot into it and want to see it drop into the "performance" range (as if the original /6 really had a "performance" range, but I digress).
I had an idea of how it should operate, but the gear reduction it's impossible to really see any physical change in the what I'll call the bellow. When I pull 25lbs vacuum as indicated on the pump, the meter slowly creeps up to 10. Maybe if I keep holding vacuum long enough, it would go higher, but my hand is cramped by this point. When I release the vacuum it takes nearly a full minute to drop back down to 0.
How fast should I expect the meter react?
