Fuel line routing and design

The fuel plumbing for an EFII system is distinctly different from that of a gravity feed type system found in carbureted engines.

EFII requires high pressure fuel pumps which circulated fuel in a constant loop from tanks to feed rail and back to tanks. This keep fuel cool by shedding heat picked up while traveling through the engine compartment.

To resolve:

• Use low point standpipe drains for supply lines coming from tanks?
• Fuel pump module location: Firewall?
• Line routing for filters, etc.

Potential designs:

This is a proposed design that puts the fuel pumps in the boot cowl void. High pressure fuel inside the cabin is not necessarily desirable.

This shows the possible standpipe drain design for the low point of the system since no gascolator is being used.