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The 25kW continuous power rating of the MGR is more than adequate for a small runabout like freebeard wants to build.
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Thanks for the mention. It's been what? a year? since I got that sub-frame missing the bracket. I'm looking to get out of the air-cooled scene to finance an electric tadpole, but the last pieces to go will be the '58 Beetle and the Lexus MGR.
The project he mentions replaces a 36-hp prime mover with the 68hp/50kW device—which should be adequate for a single-speed drive train. I'm curious about optimizing high-torque, low-rpm operation (rock-crawling) and I think the solution here is oversizing the inverter components. The motor cooling would be a combination of oil cooling and a heat emissivity coating with close-fitting fan shroud.