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I can now say I out-dynoed a dyno!
I found out recently from kids from my church that my old high school had a dyno! I asked my old auto teacher if I could come during class to try it out and he agreed. Well I went in there this morning and lit er up. It's an old chassis dyno from the 60's or 70's with a dial type reading.
At 5000RPM in 1st, my friend increased brake force. We put the sucker to full brake and the car still had juice to boot! I'm sure the brakes were just worn or something, but I can say I out-dynoed a dyno!!
The readout was wierd, two concentric scales, brake hp and ft-lbs. Brake hp measured from 0-130 and corresponding torque from 0 to like 300 something. At full brake at 5000RPM, the dyno read 80bhp (??) and the corresponding torque at 250ft.lbs. What I don't understand is how 80bhp translates into 250ft-lbs. I also have a hard time believing that my car has 250ft.lbs of torque! Probably miscalibrated. When we did the 40mph test at about full brake, the dyno read ~210ft.lbs. That's a really high number - I would love to have that much torque at the wheels!
A mech here at work did some quick calculations and he said it was possible, and that kind of torque corresponded to about 225hp given RPM at reading (close but higher than what I think the car actually has). I have to ask him for these equations, but I still don't believe him.
Any thoughts?
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