Monster Posted March 21, 2023 Report Share Posted March 21, 2023 I have a Link PDM on order currently. In the meantime I am mapping out what I can run with it. My current needs are, Injectors, Spark, Ecu, Spal Fan, and 2 Walbro 450LPH Pumps. I am reading mixed information on how many amps the walbro pumps run. They are currently wired with relays that are triggered by the ecu, and work fine. However, It would be nice to have them powered through the PDM if possible. Does anyone have insight on how many Amp's these draw, and if I will run into issues by trying to utilize the 25 AMP output to power a single Pump? Thanks, -Mike Quote Link to comment Share on other sites More sharing options...
k4nnon Posted March 21, 2023 Report Share Posted March 21, 2023 45 minutes ago, Monster said: I have a Link PDM on order currently. In the meantime I am mapping out what I can run with it. My current needs are, Injectors, Spark, Ecu, Spal Fan, and 2 Walbro 450LPH Pumps. I am reading mixed information on how many amps the walbro pumps run. They are currently wired with relays that are triggered by the ecu, and work fine. However, It would be nice to have them powered through the PDM if possible. Does anyone have insight on how many Amp's these draw, and if I will run into issues by trying to utilize the 25 AMP output to power a single Pump? Thanks, -Mike Hey here is a good link and some nice info on these pumps. you should find some answers here. Blog Post Radium's Ultimate Fuel Pump Test (radiumauto.com) Quote Link to comment Share on other sites More sharing options...
Monster Posted March 21, 2023 Author Report Share Posted March 21, 2023 Wow that is super helpful! Thank you for linking me to that. Seems like I should be able to power each pump from its own 25amp output. Quote Link to comment Share on other sites More sharing options...
k4nnon Posted March 21, 2023 Report Share Posted March 21, 2023 28 minutes ago, Monster said: Wow that is super helpful! Thank you for linking me to that. Seems like I should be able to power each pump from its own 25amp output. 25A should be fine for the walbro450pumps. Gotta remember though that if both pump are at their full flow, its going to be a 40A draw on the electrical system. So just make sure the battery and alternator output is capable of supplying the amperage needed to operate your total system and you will be good. Quote Link to comment Share on other sites More sharing options...
rrob Posted March 22, 2023 Report Share Posted March 22, 2023 They pull about 14-15 amps at ~75psi of fuel pressure. You can log the current draw through the ecu also. Quote Link to comment Share on other sites More sharing options...
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