Fuel Pump PWM Control

[Paul_VR6]

Glad that I found it, made things easy. I am running them off the inj outputs not sure of the freq maybe 78hz. The Weldon controller used 1k but probably not needed. Seems to work but time will tell.

I used the the 20a you used for the waterpump and the 40a version for the fuel pump.

[jb007]

Good stuff. I'll look into re-doing the PWM stuff after I get the EFI re-installed on my Mini. Last time I tried the PWM of the fuel pump, it didn't like it; I think because the PWM freq was to low for my pump. It's a Walbro 5CA401 109 Litres/Hour, a lot smaller than yours I guess!

Jim

[Paul_VR6]

I will keep playing and reporting back as I learn. I really like these big pumps but they are loud and suck power. On a car with no alternator brining the draw down is a big deal. Mine flows about 2.7gpm so good for about 2000hp at 14v