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After 2 hours of running the motors would be warm but not hot. It's choosing the right shunt resistor. You want the motors to step gingerly and not stall out and not exceed the specification of the...

Sorry just could not help noticing your icon. I competed back in the 70s at an autocross with my formula v that I had designed against an austin healy that had a 327 in it with formula racing tires....

I've been using shunt resistors to limit the current to the stepper motors and have had good success. It waste power but it was a quick fix. I would find chopper power supply's from surplus houses...

Has anyone looked at building the waterjet pump? Virg at www.brokenhammer.com

I sure do like the Diesel engine as the power source. I'm trying to go off grid and plan on using veggie oil for...