Friday, August 20, 2021 - 02:03 pm, by: Tai Johnsen(Privatejohnsen)
I have noticed a weird harmonic oscillation when the car is off and the fuel pump is priming, and there are also small oscillations under light load.
I pulled the return line off the reg and it stops completely.
I'm still not 100% sure why, because another car I'm working on has a much larger pump and the same stock return line and it's fine.
i'm going to PWM the pump and slow it down to match fuel demand, I had planned on doing this anyway as it will make the pump live longer too and keep some heat out of the fuel as well as reducing noise.
The controller is from an Aston Martin V8 Vantage, but i think they're used in a few cars. 20khz output is nice too.
