Finally Going Single! Part 2 by cohbra

3 minute(s) of a 168 minute read

I just found a calculator here: http://www.lmengines.com/fuel_lines_calc that is a great tool for sizing your fuel line. I greatly over estimated on my fuel rail height and line length using the calculator and found that I should only incur a total pressure loss of 2.2 psi in an 18' long -10 fuel line @ 70 gph on 2 pumps. This doesn't account for any fittings, but I think I have plenty of room left over. Whew! I feel better now that I have found some positive information. I'm betting my fuel filter is clogged.

5-7-2012

I had a few minutes this afternoon so I threw together a quick schematic for how I plan to rewire my pumps. I had intended to only use 1 relay per pump, however 2 per pump was required in order to have an indicator light to alert me in the event that power is lost to one of the pumps. Originally I was going to use the N/C (87a) contact to provide this signal, but it would require switching the negative leg on the pump using the relay. In that scenario, I would have +12VDC present in the tank at the pump at all times, even when the ignition was off and I didn't really like that idea.

5-11-2012