Quote:
. . . Before I added a Flo-scan in the fuel line I was able to run 46.5 mph. . .After the flo-scan addition I lost a lot of rpm's.
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That Flo-Scan meter has an orifice in it that's a potential flow restriction, which might explain loss in rpm. I hope you're running an oil injection motor! If you're mixing oil with gas in the tank and starve the motor for fuel, you're also starving it for oil!
I originally bought a 0-12 gph Flo-scan gage instead of a larger range meter because I wanted an accurate reading at cruise, and literature indicated it was ok for a 115 hp engine. During the installation however, I happened to speak to a Flo-Scan technician, who told me that those old V-4's like I had could suck up more than 20 gph at WOT! That meant I was at significant risk for leaning out the engine due to the flow restriction. He asked me to send him the gage and sending unit, which he swapped for a 24 gph unit, and then recalibrated the gage to the bigger sending unit, all at no charge! Great outfit to work with, who also probably saved me from killing the engine!