For an engine that will help the KR1 look more like a P51, there is no doubt that the 3 or 4 cylinder Geo or Suzuki conversions from Raven or similar designs are the best for this application. They are slim design, all aluminum, fuel injected, and have great torque on the top end. Their overhead cam design allows for a redline rpm somewhere around 7500 to 8000 rpms, so with peak power setup on the PSRU to be at 5000 rpm, it will serve you well. Obviously you will have rebuild times similar to the high reving Rotax engines, but will have half the cost in it.
You could also use one the lesser costing Rotax engines that are 2 stroke, but the rebuild time is short compared to the 4 stroke. I personally would stay away from the Mazda engine for the KR, which favors a design that allows for a heavier engine. The single rotor engine will weigh far more than the Geo motor, for the same output. They are also not near as fuel efficient as they could be. If I could install that heavy an engine then my choice would go hands down to a Chevy 4.3V6, with a Belted Air Power PSRU. Many years of reliable service, and lots of planes flying them.... Colin Rainey First National Mortgage Sources Lending Solutions in All 50 States 386-673-6814 office 407-739-0834 cell [email protected]
