Quote:
Originally Posted by red 5
So If you have the same cc 3032 and the same gear ratio 1.75 and you can get it to 7000 rpm you have about 380 hp.
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If the rpm,s go up more ,and the engine does not drop any further in torque ,you will have more horsepower.
If the torque is falling down rapidly (what mostly is the case),and rpm goes up ,horsepower will drop .
Gear ratio is not involved in here,as measuring on a dyno at the propellorshaft,the ratio in the gearbox has to be in the calcalation for horsepower,so ratio makes no difference ,if calculated properly.
Most dyno,s that have an elecronic load cell,can accelerate while measuring torque ,and engine rpm,that is all it need for calculate horsepower.
Suppose a ratio 1,75:1 ,and 7000 rpm (engine speed),if measured at the propshaft,the dyno will see only 4000 rpm,but in the dynosoftware you have to fill in the ratio(either reduction ,or step up)so actual HP measurement can be done.
sterling