450-500HP 360?

273 said

I don't understand how random formula's that give different results from one another is suppose to hold more weight then a $100,000 machine that's designed to measure hp (torque & rpm) and if dyno aren't accurate how can we verify these formulas accuracy ??

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You don’t verify the dyno’s accuracy. You have to verify the operators accuracy.

If they don’t calibrate the dyno with certified weights then you can’t trust the data. How many RPM/second the test is changes the power and torque.

Change the coolant or/and oil temp and it skews the data.