How much pulley ratios is everybody running on there built motor KB trucks for a "race" setup?

 

10# lower with a 2.8" RR upper which makes 20#'s.

 

My 3" and 8# makes 17#

 

99% of the time I run a 8# lower and a 3.25" upper

when I ran my 10.90 I ran the 8# lower and a 3" upper

I have tried a 2.8" upper, but lost traction, so normally I stick with the 3.25" upper whicg gets me 11.0's in cool weather and 11.3's in warmer weather

 

8lb lower and 2.75" upper which nets me 19 psi. Have run a best of 10.70@124 with that combo.