I would think you'd need to do some airflow work to make it keep ramping up horsepower at such a high engine speed on a utility engine. I don't know if that's the case, haven't had a chance to mess with the four stroke OHV motors, but engines that stop breathing at higher rpms due to the intake air density hitting a "packing point" typically need to have crazy compression ratios in order to keep revving further and making power. A good example of this is the old Mexican F3 engines based on the Chrysler 2.2 K-car engine, they ran something like 15:1 compression ratio in order to breathe through the mandated restrictor intake at high rpms and still keep pulling.
If you get real crafty with a electric dyno, you can induce load on the system by putting a big load resistor on the generator wiring. The Dynapack hub dynos which use electrical power generation monitoring to calculate mechanical power can be programmed to run variable amounts of load and can simulate certain racetrack incline load conditions by modulating the load resistor value.
If you get real crafty with a electric dyno, you can induce load on the system by putting a big load resistor on the generator wiring. The Dynapack hub dynos which use electrical power generation monitoring to calculate mechanical power can be programmed to run variable amounts of load and can simulate certain racetrack incline load conditions by modulating the load resistor value.
Last edited:
