I calculated the turbine nozzle dia. using 1.28 a/r and 2.5 radius. It came out to be 2.02" dia. The latest calc used 2.00". So that is really close. The 1.28 a/r housing is what I'd start out with.
I was using a 65% eff open turbine housing, so I will do one last calc using the 2.02 nozzle dia. and a 70% eff, pulse (split housing), dual ball bearing turbine housing.
I was using a 65% eff open turbine housing, so I will do one last calc using the 2.02 nozzle dia. and a 70% eff, pulse (split housing), dual ball bearing turbine housing.