Could anybody tell me the standard boost pressure on a my99 classic?

 

Should be somewhere between 0.9 and 1 bar, varies slightly between cars.

 

Tidy, tested mine this evening, holds 1 bar all the way up the rev range. had a noise earlyer so checked all the hoses, loud woosh whilst pulling off a round about. had a dodgy hose of the dv to the inlet manifold, could it have been this?