Brian, Right now I have gravity feed from header tank to carb. If I added a facet pump on the fire wall,.. low, next to gascolator, could I also have a fuel line by-passing that so that I only have to use it in a pinch? I have a zenith carb,...how do I regulate the fuel pressure to that when using the pump? I worry about flooding or using more fuel than is needed. Right now the gravity works very well, so I am not sure why I need a pump save for the constant doubts I am developing, perhaps by reading too much in these recent discussions. ----- Original Message ----- From: "Brian Kraut" <brian.kr...@engalt.com> To: "KRnet" <kr...@mylist.net> Sent: Friday, November 12, 2004 9:23 PM Subject: RE: KR> Facet #40108
> Another thing or two to keep in mind when designing fuel systems with the > Facet pumps. > > You shoud have the pump mounted low in the system if possible. I had one > mounted on the back of my header tank to transfer fuel from the wings to the > header. I did some experimenting first to see if the pump would suck up > fuel through a dry line from up that high and it worked fine. In operation > a few times after it was installed it refused to suck a prime through the > line. A good slip with the wing of the selected tank high would usually be > enough to get a prime sucked in the line and start it pumping normally, but > mounting the pump lower would be a lot better. > > The Facet pumps restrict the fuel flow some when not running. I put one on > my firewall as a boost pump for the header tank and found that it restricted > fuel flow enough when it was not running that I couldn't throtle past half > before the engine would start coughing. I measured the fuel flow and then > removed the pump and increase the flow by over double what it was going > through the pump when it was not running. > > Keep the odd shortcomings in mind and the pumps work very good. > > Brian Kraut > Engineering Alternatives, Inc. > www.engalt.com > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
