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I am building one now.
I have a 220v 3hp single phase 2 pole (3750rpm/noload) motor with 5/8'' keyed shaft and a standard 2.5gpm 3,000psi pressure washer pump that takes a 3/4'' shaft. Going to couple them together with an aluminum jawed urethane spider shaft coupler and a 3/4'' keyed shaft.
If I try to spin the pump up to full speed (3700 to 3400 rpm) at 3,000psi and try to get 2.5gpm out of it that's come out around 4hp.
So if standard 2.5gpm nozzles cause the motor to draw too much power then I will go to larger nozzles to drop the pressure and the power consumption.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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