Tire diameter effect on rollout and reaction time improvements

[33 IMP]

I changed tire size last year halfway through the year. I went back and do the math on the before & after. My times did move in the direction the theory says they should by .013. Now, was that completely due to the change, or just coincidental, or maybe some semblance of both??? I’ll never know for sure, but the math didn’t lie, and perception can be reality.
I’ll tell you this much. I was frustrated enough with it all that I went a whole new direction and invested in a transbrake and adjustable button just to get a better handle on things. We’ll see how that goes. Today’s adjustable brake buttons are a tool that are hard to argue with. I realize that in the OP’s world of NSS racing, they’re not applicable. I run almost exclusively NHRA Pro ET though…. So if you can’t beat em, join em.
With all that said, I agree with most everything Doug brings up above. And totally agree that the best process is to find a spot you can be consistent at, then keep yourself there and adjust the car to suit that spot.

I LOVE my transbrake. I'm much more consistent with it than footbraking. It may not be significantly faster.... but it sure leaves better and feels faster.
And I really agree with your last paragraph. Front tire height is just one of the adjustments I've tried on my cars.

 

[dvw]

It's not imposible to have good outings foot braking, no starting line chip, and shifting with the push button. But it does take work. Took a few test runs to hit the 9.00 index. Then we damn close. Though I went brain dean Sunday morning
Doug

 

[RemCharger]

That's about as tight as you can hope for in a footbraker. Nice.