80/20 Rule

yellow rose said
When you do it long enough you have a good idea what you’re leaving on the table. I’d bet PRH, RAMM...replicar...I know there are more can give you a razor close estimate of what left on the bone.

273 said
If the average guy comes up a few hp short on a build then what another similar guy did you might rob yourself a few 10th in the quarter mile.
In things like F1, Nascar etc.. those little gains are the difference of winner/loser that's why so much R&D, no average guy can go in Nascar like they could in the sixies.

I our local stock car racing their drives that grabbed rockers of every Chevy they could find for best set they could put together, it's all these little things that added up.

So I will just say this, and I'm not disrespecting anyone!!!. I did a "guess my ET" thread when my basically stock 360 had stock exhaust manifolds, stock 904/converter and 2.45 gears. NOT A SINGLE ONE guessed 13.9's. Nope, not one. Not even me. All guessed 15's and 16's except for 2 guys - me and another guessed 14's. When it comes down to it, I'm not sure I believe in the word "guru" or if anyone has a ripp'n clue vs another.