So I should shrink the chamber and add barrel?

I tried GGDT, and it keeps telling me I need waay more chamber than barrel, which I dont think is correct. I havent a clue on the valve settings.

can someone optimize my lengths for me?

I have 2" barrel 3" chamber, and 32" combined barrel/chamber ...

I did a search, but I could not find any threads about the best chamber to barrel ratio for launching 2" nerf vortex rockets.

my current setup is 70 ci tank 68ci barrel. 1" sprinkler, 80psi.

the barrel is 22", and the tank is a 3"x10", in an AT-4 style housing.
I cant make it any longer, so if I ...