Compression Ignition Addict
Join Date: Jan 2009
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Suggestions for reducing flow through purge valve
Here's what I have. I run a check valve based conversion with one solenoid valve as a purge valve. The purge valve is hooked up to a timer. The shortest amount that I can set the timer to is about 8 seconds. However, I only need a 3 or 4 second purge (tops) to clear the veg out of my system. In 8 seconds, I push almost a quart of fuel (3/4 of it d2) back to my veg tank. This seems like a waste of diesel.
I have been experimenting with using a ball valve to reduce the flow of fuel, but I was wondering if anyone had other ideas about slowing down the flow of fuel so that in my 8 second purge, I only move about half as much fuel as I am now?
Would it work to put a FPR on the return line? This seems expensive, but would regulate the flow of fuel. Other thoughts?
'96 F-250, 230k
Custom SVO Conversion (check valves)
On board filtration
80k SVO miles and counting!