Hi all, you probably know that i am awaiting my HLM304 map so i am doing my Stage 0 tune:

Done the plugs ,leads, cap, rotor arm, modified the Air filter box with standard filter, all new hose on the turbo and all large hose cleaned and tightened up. I set the base boost on the actuator to 5lbs instead of 4.5 to make sure the door was shut!

So i should be ready for a surprise but i had a surprise today as the boost was down to 6psi with my air bleed type MBC on so i changed it for a brand new proper MBC and it was still the same 6psi

I took off the MBC and plugged back in the standard BCS and Whoa! what a difference, it boosted gradually then suddenly 15psi and immediately dropped to 10psi which i expect is the ECU taking over to safely cut it down, but it did not feel like hitting the proverbial brick wall i have had with the 940 turbo`s, is this a normal feel or should it be instant cut instead of gradual?

Has anyone experienced similar?

At least i have some sort of feeling of 15psi for when i fit the new 304 map!

Any ideas? or just normal......