Timer 2 caculation

[Bob Verwold]

Originally Posted by Straightliner

I have been there and read all of it. He tells you how to figure out your ratio. I'm asking where it's posted about the math to figure out how much time needed to run a 10.90 something. Example I had timer 2 set at .6 and I ran a 10.75, now I want to run a 10.90. my car has a ratio of 8:1. What's the math?

I'm with Rick, I think your a tad high on your number. The best thing is seat time and good records.
You won't be able to slap up 10.900's all the time.
Do you have a good weather station ?