Thread: Proper k value forula

99 Sentra SE-L(Turbo)
*GT28R Turbo/3" Turbo Back/BC Stage 2 Cams*
13.41@108mph 20lbs 283hp 300tq.
01 Sentra SE 44k Miles New DD!
94 Sentra Se-R Project SOLD
95 200sx Se-R SOLD

What is the formula to determine appropiate k value? I can do the math, just need the formula. I'm running 555's. Will be tuning this week and need the proper base k value to then start adjusting the fuel map.