I have been doing climb tests using the default auto-speeds with Alt-X. Does setting the auto-speed to 175 and 225 reveal something I am not understanding? I saw last night that the P-51D and P-38L both use 174 as their default and the Mosquito VI used 168.
For your test they the are Karnak, for any giving speed, Acceleration * x = Climbrate. Where X is just a constant based on your units.
I.E. Climb rate and acceleration are just different units of the same thing.
Your acceleration test should very closely match the climb rate test at the different speeds 175 just happens to be between 150 and 200.
HiTech