I have a friend (Gene Vincent) putting a 360 on his LNC2.  He has purchased the Superior XP 360 and is discussing the fuel system.  The Dukes pump is now $750.  Is anyone using one of the Hot Rod pumps as a back up electric fuel pump?  Also, did you plumb a by-pass and why? What spec's did you try to achieve?

 

Any thoughts on a proper installation of a little more affordable backup pump would be appreciated.

Larry,

 

Some have used Facet pumps.

 

No bypass is needed if the pump is flow-thru like the Duke pump - i.e. the engine pump has no trouble pulling fuel thru the "backup" pump located betwixt the gascolator/filter and the engine pump.

 

If injected, the throttle body should have pressure range specs.  I.E.  My Lyc I/O 320 engine with a Bendix RSA system requires the pressure to be maintained above 12 psi and not exceed a max of 45 psi at the throttle body.  Generally, my engine pump delivers 26 psi and the boost pump might add just 2 psi on top of that - that is the boost pump is regulated to produce about 28 psi whether fuel is flowing or the mixture control is at idle-cutoff. 

 

If carbureted, an O-320 wants to see no more than 8 psi at the carb, with a minimum of .5 psi and a desired pressure of 3 psi. 

 

This is information from the Lycoming engine manual - surely Superior has one available.

 

Note that with a header tank, the backup pump is only pushing the fuel (0 head), not pulling it up from the basement (wings), too.

 

Uh, which side of the firewall?  Its hot fwd.