Hi guys, I'm after some help with my boost. Under full load (uphill, topgear, full throttle, full boost) I've noticed my boost fluctuates by 0.2-0.3 bar between 1.7 to 1.9 bar. I haven't had it long since a change of heads (to AVCS) and always thought it was a bit "fizzy" instead of being smooth on boost but it's usually accelerating too hard in the lower gears for me to watch the boost gauge.
Does that sound like a boost leak to you guys? It seems pretty normal below full boost.
It also stalls and misfires when cold but I'm assuming that's going to be ignition or something as I've already changed my coolant temp sensor and I'm running MAFless. I'm also assuming these two problems are unrelated.
Anybody had similar problems?

 

Simplest thing would be to do some logging and see whats happening,.