On the MD240R it comes on boost at something like 2800rpm and surges up till about 4200rpm and the boost is capped at something like 14 psi then the air to air just wind it up to 35psi and hold it at 30 something or other...

Stu might be able to remember all the specifics or something cos I can't!!

I could be a politician or a solicitor with that reply!