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[Simonizer]

So your saying that it would be 115hp at the crank..

If your torque numbers and rpm are accurate, then yes. This must be a simultaneous reading though. My calculations are not "ball-park", they are based on the accuracy of the measuring device. The calculations are exact from there. The best dyno's use a torsion beam to measure torque by the deflection (or twist) in a shaft. This is observed by a timing-light set-up
and a very accurate protractor. Once we know the torque at a given rpm, (using a digital tachometer) we can calculate the HP exactly. No guessing.

 

[04ultra]

Yes, the Briggs in question would be developing 7.3 lbs.ft of torque at 3600 rpm and the Stihl would be developing 2.1 lbs.ft of torque at 12500 rpm yielding the same HP.

Simon if the saw was at 3600 rpm would the tq be higher than at 12500??