Explode64 Posted December 23, 2018 Report Share Posted December 23, 2018 I am looking at running a Walbro 460LPH in tank fuel pump in my 1995 RX7. I don’t think the factory wiring and 2 speed set up will handle such a big pump. I want to keep the variable speed so am looking at running the 33/66/100 PWM control. Will a 25A solid state relay like this work or will I need a Fuel pump controller. Can any one recommend a relay to get? Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 23, 2018 Report Share Posted December 23, 2018 That one is for AC only. You can get similar ones in DC versions but they need a big diode and heat sink to give reasonable life. I have used the Hella ones for fuel pumps before - they are rated at 22A continuous so should do that pump no worries. They also say they are ok for inductive loads so no need for a separate diode. https://www.hella.co.nz/en/products/relays-flashers/solid-state-relays/12v-4-pin-solid-state-relay-22a.html You need to supply the power to these from a separate relay that switches on/off with ignition. Quote Link to comment Share on other sites More sharing options...
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