[mikey]

I am running 6.5 psi from an electric pump.

Vacuum at tickover is around 10 - I have a vacuum gauge and see what it does when I floor the accelaerator. It is a radical roller cam though so I guess the vacuum is not brilliant.

The bog sems to last quite a while and it feels like you have slammed your brakes on when you floor the throttle, so I am guessing that when the secondaries kick in it is not getting the fuel to go with the addition al air flow.

Mike