jsbsti Posted June 9, 2023 Report Share Posted June 9, 2023 Hi, overall we set on which PWM frequency the fuel pump? Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 9, 2023 Report Share Posted June 9, 2023 What fuel pump and controller? Quote Link to comment Share on other sites More sharing options...
jsbsti Posted June 9, 2023 Author Report Share Posted June 9, 2023 AEM 340lph. Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 9, 2023 Report Share Posted June 9, 2023 I assume that would be a roller vane type pump since it looks like a 044 copy, in my experience they dont work particularly well with speed control, the pressure tends to get very "pulsey". Frequency will depend what your SSR or controller wants, but most commonly 100-200Hz. Quote Link to comment Share on other sites More sharing options...
jsbsti Posted June 10, 2023 Author Report Share Posted June 10, 2023 Here are two tests the first in 100Hz and the second in 250Hz original controller Subaru EJ 207. Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 10, 2023 Report Share Posted June 10, 2023 This is why I asked what controller you had in my first post. For the OEM subaru pump controller you need to use 80Hz, and it only has 3 speeds. Set up below from our V10 base map, this mimics the factory control. jsbsti 1 Quote Link to comment Share on other sites More sharing options...
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