And here lies the truth of it all. 99% NEVER really test. Most don't actually know how. It's damn near impossible to test on a test and tune day, let alone a race. If you want to really test, you need to start on the dyno and work on it until you are sick of it.

Then, you rent the track. And, if you are lucky or really good and have done your homework, you may be close enough to evaluate changes made at a race or test and tune.

I have rented the track 4 times in one year and still didn't get what I wanted. Back to the dyno and keep on going.

Now, I know there are some super tuners who roll new [Edited by Moparts - Family Friendly Site - Keep it clean] right out of the box and rotate the earth. Those dudes are few and far between.