Dan, Installing them in-line is probably not a good idea. Electric fuel pumps push, not pull. Install them as close to the the tanks as possible. I found this out the hard way...I put dual Carter electric fuel pumps (in-line)in my drag-race car, it overpowered the carb float... and flooded the engine...on the starting line....NOT Pretty. Why did I put the second one in the first place? I had the first one mounted in the engine compartment, the engine would stave for fuel halfway down the strip.... because electric pumps push fuel, not pull....Duh! How did I fix it? Removed the front fuel pump and ran the second installed pump solo near the tank. Wha-la...no more fuel starving, or flooding. Try doing that in the pits, not a fun day at the races...But I did learn something!!!!!
Gravity feed fuel (all of it)to the pump inlet. Get ALL of the fuel to drain out of the tank and into the fuel pump inlet. Otherwise you're just carrying extra weight and unusable fuel. Placement of the pump is critical (Yes, I'm being.....redundant....). For redundant fuel pumps to be exactly that, then entirely separate systems are usually in order. Follow this same type of thinking throughout the installation. Suction and pressure sides. Power for the pumps should be on separate electrical busses (essential buss and auxiliary buss). Each should have it's own on/off switch, fuse or circuit breaker, and fuel inlet/outlet. Although I'm not at all crazy about routing fuel through the cockpit, fuel gauges for both pumps should suffice. albeit requires additional pilot workload to monitor the systems guages. You could research the pressure settings for a low oil pressure light sending unit, select one that is suitable for your installation (carb), plumb and wire that into the system for low fuel pressure. Most float carbs for automotive use need a maximum of 6 lbs of fuel pressure, finding an oil pressure sending unit that indicates at something like 1.5 psi will be a real challenge. Netters: A little help???? Ron Eason sells a nice fuel management panel, the schematic is at: http://www.jrl-engineering.com/images/knotvue/fuelmgmtcircbd.gif A picture of the board is: http://www.jrl-engineering.com/images/knotvue/fueltkmgr.jpg If you want to order one: http://www.jrl-engineering.com/kv-ftorder.html is a form to fill out. I'm not pushing these for Ron, I just think it's an elegant solution for a fairly complex issue. I like ideas that reduce your pilot workload...This happens to be one of them. --- Dan Heath <da...@alltel.net> wrote: > I have just received our 2 Facet fuel pumps. I am > planning on installing > them in-line. My question is: What is the best way > to know if one, just one > of the fuel pumps is not operating. Install > switches on both. Indicator > lights. Something else? ===== Scott Cable KR-2S # 735 Wright City, MO s2cab...@yahoo.com __________________________________ Do you Yahoo!? Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes http://hotjobs.sweepstakes.yahoo.com/signingbonus
