Hi All,
Just making an enquiry if any of you have used an adjustable fuel pressure regulator on your return line setup.
I have put in a return line on my RV-10 using the Andair duplex valve in the hope to run some mogas in the future. I am having fluctuating pressures during my test flying. Sometimes I think I have opened the return line valve too much and sometimes not enough as the fuel pressure is up and down. When I switch on the electric pump the pressure surges and I am not happy about it being very high, as it puts a strain on the pipes and fittings and encourages a leak.
I was thinking of installing an adjustable fuel pressure regulator and tuning it to about 20 PSI, that way the fuel pressure after the mechanical pump supplied to the injectors, is at a constant pressure all the time, and everything else can go in to flow back in the return line to the tank, taking some heat away from the fuel pump as it goes. When you then engage the electric pump you would get a lot more flow and the same pressure that you had dialled in before of 20 PSI.
Any comments, suggestions, advice ... etc
Thanks
Amer
Just making an enquiry if any of you have used an adjustable fuel pressure regulator on your return line setup.
I have put in a return line on my RV-10 using the Andair duplex valve in the hope to run some mogas in the future. I am having fluctuating pressures during my test flying. Sometimes I think I have opened the return line valve too much and sometimes not enough as the fuel pressure is up and down. When I switch on the electric pump the pressure surges and I am not happy about it being very high, as it puts a strain on the pipes and fittings and encourages a leak.
I was thinking of installing an adjustable fuel pressure regulator and tuning it to about 20 PSI, that way the fuel pressure after the mechanical pump supplied to the injectors, is at a constant pressure all the time, and everything else can go in to flow back in the return line to the tank, taking some heat away from the fuel pump as it goes. When you then engage the electric pump you would get a lot more flow and the same pressure that you had dialled in before of 20 PSI.
Any comments, suggestions, advice ... etc
Thanks
Amer