Hp and E.T. 'S

There's been tons of arguments about the true hp of certain combos especially magazine builds all the race guys always say the only true way to know is run it.

I agree that running it show what your car is capable of and probably best to prove it's perfomance but I don't believe it's any better way to accurately calculate your hp.
There so many variables between weather location and track conditions and drivers abilities that you can't accurately compare et's and where did these equation come from obviously we know nothing about how these engines were dyno or how these cars were run to find out the calculations.

I think we all get caught up in the details sometimes and throw the baby out with the bathwater.