I can't answer your question, but I do have one observation from my experience.
I have a Zenith float bowl carb with gravity feed. I had the required fuel flow according to Great Plains recomendations, but I also wanted the extra margin of safety for take off, landing, and climbs so I decided to put a Facet electric pump in line. I couldn't keep the engine running above half throttle on the ground with the pump installed because the pressure from the gravity feed wouldn't overcome the spring loaded valve in the pump. There are a few ways to overcome this. One is to use a higher quality pump that is made to have less restriction when it is not running. The other is to put a low restriction check valve in parallel with the pump. Aircraft Spruce sells one. Of course this means a T before the pump and a T after the pump. In my case I just did away with the pump all together because my fuel flow was more than adequate without it. -------Original Message------- From: Colin <crain...@cfl.rr.com> Sent: 07/03/03 11:38 AM To: KR builders and pilots <kr...@mylist.net> Subject: KR>Carb fuel pressure > > Netters, Does anyone know how much fuel pressure to run if adding an electric fuel pump to a gravity flow setup for takeoffs and climbs, go-around etc... I have an 1835VW with Ellison carb, gravity flow. I want to add an electric pump to make sure during initial climbout, and on approach to landing/possible go-around I am protected against fuel starvation. Colin Rainey KR2(td) crain...@cfl.rr.com Sanford, Florida FLY SAFE!!!!_______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html >
