limited boost out of t25

[zx_volcane]

as per title

peaking at 20psi

been on the hunt for boost leaks, can't see any, everything is tight, soapy watered ..etc

Only thing i've done is pull the turbo and remount since the hotside clamp lost a bolt and was starting to make a bid for freedom.

Also fitted egt sender

Turbo looked ok

Didn't replace the manifold gasket (steel), but had only been on the car about 200 miles - although can't see any obvious blowing and everything is nipped up tight.

MBC is wound right in.

Soooooo

I'm sure it was running over 20 before all this.

Turbo knackered / manifold gasket leaking / egt prob somehow causing a restriction

Any ideas, as I'm fed up of going under the bonnet


*edit

Its probably the gasket isn't it :/