clare at snyder dot ontario dot canada wrote:



How big a prop do you want to spin? with 258 torque available at
1800, assuming a fairly flat power curve you have 135 HP at 2800
RPM. Not bad for what would likely turn out to be a 300 lb engine
stripped for flight.
Realy, I don't know but I don't think you have 135Hp@2800rpm.
150hp@3600rpm in the car...

For TBO: think Thielert....
258 ft lbs X 2800 rpm = 722400 / 5252= 137.54.
The torque will hold well past 2800 RPM on a turbo Direct Injection
Diesel. Real fat torque curve. I'd be very surprised if there was
less than 145 at 3600 (Math says 176 if the torque holds, I figured
85% of max torque at 3600, for 150 HP)

for typical automotive diesel, the torque curve is flat only in the
range of 1500-2500 rpm.
More rpm less torque...

You may reprogram the ECU and give a flat curve for higher rpms, it's
the way Thielert use to have a 135hp , 1700cm³ engine from a 95hp
automotive engine. Nerver over torque this type of engine but it may
over rev and keep long life.

By
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Volem rien foutre al païs!
Philippe Vessaire Ò¿Ó¬