I am currantly running just under 1 bar with a standard turbo can i turn it up useing a bleed valve or is this not advisable?

Generally not advisable,

I'm sure someone more technical can explain though.

Take it back to Mike and get him to adjust the map, as you may well be showing just under one bar, but what does it spike at when you boot it at the moment?

Very easy to blow a turbo with a bleed valve if you dont know what your doing with boost levels.

Prob right i need to speak to mike about an intercooler and de cat so will leave it to the exspert. Cheers for the advice

He fitted the ABD Racing FMIC on mine a long while ago, cannot fault it.

Have a look at the ABD Racing TIP whilst your there.