Well I finally pulled my finger out over the last few months and got my Forged engine running in my car. Started first time, only a small water leak to contend with a clamp being slack but apart from that everything seemed fine. There is a rattle coming from either the engine or ancillaries that will be dealt with once I'm home next week in prep for Mot. However the thing i noticed that I did not like was, when I was taking it a run to see how she was, i would accelerate to the point of boost and change gear. I did this for a few miles then getting braver decided to bring her onto boost ever so gently. Now it doesn't do it everytime, I think i noticed it more if it was a more harsh acceleration rather than feathering it up the rev range. But as it comes onto boost slightly it takes a jolt, I can hear the dump valve going off more than once. I wondered if having my External wastegate not plumbed in had anything to do with this? Just looking for some ideas and avenues to persue at the end of this week when I'm home. Any help is greatly appreciated ladies and gents. No suggestion is a stupid one either Cheers John