GM Engines

Jeff Ackland's LS V8 powered P85 is equipped with an SDS EM-5 8D engine management system. Flying in Kansas.
First flights video
Ground running, takeoff, low pass and landing

Rover V8

Gordon Wardstrom's Rover V8 powered Bearhawk. SDS equipped. Over 1000 trouble free hours to date. Runs head to head with IO-540 Bearhawks.