sorry to hijack, but whilst we are on the conversation of large turbos i need a little help. When my 2.6 astron was dyno'd last time, the boost controller we were using had problems, and boost couldnt be increased any more than 14psi. The turbo is a hi-flowed t04 with a 1.06 a/r exhaust housing, sierra rear wheel etc. Power was 303hp atw approx 225kw atw. If what im reading is correct, large turbo's like this wont reach their efficiency till after 20psi depending on the specifics (i have no idea about the flow charts of this turbo etc)? So i should expect something around the 350hp atw mark and upwards with the turbo boosted to around 20psi?