<VV> fuel pump power question

[Sethracer at aol.com]

Rod asked: 

Seth in  this case does fuel simply flow thru the electric pump when it's 
not  on?
The original question was for a replacement pump to be mounted near the  
tank. I was just addressing the wiring of the pump power feed - excluding 
either  a shock-opening switch, as used on many Fords, and/or an oil pressure - 
closing  switch, which many add to prevent fuel from flowing if the engine 
has stopped  turning. If a toggle switch is wired as shown below, the center 
position of  the switch will keep the electric pump from running at all. 
Closing the  switch to the latch side will provide ignition switched power to 
enable the  pump (while the ignition is on) and pushing the switch to the 
momentary  side will allow the pump to push fuel into the carbs - with the 
ignition off  - for as long as you are pushing the toggle to that position. A  
shock-switch could be added anywhere in the "Out to Fuel Pump Power"  circuit 
out to the pump. It will have to be manually reset when needed.  The oil 
pressure cut-off should be in the "Ignition switched 12 Volts  In" feed into 
this switch. The momentary position on this switch could  then be used to 
fill the carbs after a long "sleep", even if oil pressure  was not yet present. 
 That makes for easier starting. 
 
And for Rod's specific question. It depends on the pump. Many pumps will  
just let fuel pass through when they are not turned on. Some can act as a  
positive block for flow. You would have to check, or ask for advice on a  
particular brand/model. That is if you are retaining the original mechanical  
pump. - Seth
 
Personal Note: - Rod - The Sharks could sure use your help!
 

 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 15188 bytes
Desc: not available
URL: <http://www.vv.corvair.org/pipermail/virtualvairs/attachments/20150314/020b8e4e/attachment.jpe>