It all depends on the ratio of the gears to each other, from 1 to 2, from 2 to 3, ect. Usually you take 1st up as high as you have balls enough to do, 7300? :shrug:. and work your way down from there. You could get a dyno on your can and then do a little math with each gear ratio to find out the EXACT shift point to shift at for each gear, thats if your completly anal. but once I get my car dynoed, I'm doing this for sure.
Anyways I like shifting around 7000 in first, 6900 in second, 6700 in third, and 6500 in forth.