question Help with air brakes on my Milly

[Mk3iain]

I have been chasing leaks in the air systems on my Milly and noticed that the air pickup line to the pump is connected to the rear inlet manifold ! OK I think that is normal, except this engine has been fitted with a turbo !!

I suspect this has been a problem for a couple of reasons.

At low revs the pump is competing with the engine for air.

At high revs pressure is being lost from the manifold.

I have disconnected and blanked the manifold pipe and am going to route the pump air pipe to a source of clean air.

Am I chasing my tail or am I right, it just did not make sense ?

Iain