Coming off boost, as the Bailey Dump Valve vents to atmosphere the car goes back into Vacuum from Positive boost, it occasionally judders like it has some fuel/air problem.
It has done this for a while now, and if you put your foot back on the throttle it picks straight up, and if you take it right off it just slows down like normal !
Checker the Turbo pipes, TB pipes and Induction pipes and these are all ok.
Fuel is usually Optimax/SUL and it makes no difference with the fuel level.
Anyone any ideas ???