I recall Paul Lamarr's list had several of those in old emails. I'll see if I can find one.....best to follow what someone has already done successfully on here, I hope they respond.

There are a lot of nuances in a HP fuel injection system (and all fuel systems) but with a low wing there is no head pressure to feed the pumps so they must 'suck' from them. Not a big issue, if vented well. One issue is if you have to return fuel to a tank (the excess FI gas return), in that case some use a header tank. Or you can send it back to one (or both) of the fuel tanks, which might require a duplex multi-position fuel valve (LRB) and two sets of lines.
IIRC, there are only one set of pumps (one for backup).
Venting is very important.
RV's that are HP fuel injected are examples of this type of set up. Electronic/FI engines are becoming much more common.
Marc

-----Original Message-----
From: Rotary motors in aircraft
Sent: Friday, February 21, 2025 10:15 AM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Fuel injection Diagram

Hi : Do somebody have a schematic drawing ? Of a typical low wing experimental aircraft fuel system to the 13B.
Can’t find good detail info.
The feed from the wings to the high pressure fuelpumps.
Where to place the low pressure fuel pumps and then to fuel injection pumps.
Must i do a header tank ? or not.Must the high pressure pumps be inside or outside on the firewall?

Regards Le Roux

Sent from my iPhone
Le Roux Breytenbach

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