| Re: Vacuum pump wiring help [message #313635 is a reply to message #313633] |
Wed, 22 February 2017 13:09   |
armandminnie
Messages: 864
Registered: May 2009
Location: Marana, AZ
Karma:
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Senior Member |
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I don't know how long it takes but I will try to measure it. Dave Lenzi says (I listen to him) that boosters are made to operate at 16 inches or more of vacuum. According to the guy I bought my vacuum pump from (on Ebay) that switch (same as yours) is set to 18-20 inches but no telling for sure unless you measure it. Another factor is what is the range of the switch - Dave says about 2 inches between on and off so that it is not running unnecessarily. The switch that came with my pump had a problem (Ebay guy replaced it) so I bought one of Dave's adjustable switches. He told me to adjust it so it comes on at 16 and goes off at about 20. Dave says that as soon as the booster vacuum goes below 16 you lose braking power and at 2800 feet of altitude my engine will only produce 15 inches so he says I should just tolerate the pump running a lot around home. I think turning the pump on manually only is not a good idea - when your brakes are not working is no time to be looking for switches and waiting for pumps.
Armand Minnie
Marana, AZ
'76 Eleganza II TZE166V103202
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