Cheers for the reply, I should've mentioned my spec I suppose!
1473cc, BVH, Full blend, toothies, PSD front mount, Ported/Polished TB, Ported/matched GT inlet, PSD 4 branch/full system, red (310cc) injectors, Matched Newmann cam, Custom PSD map.
Surely I was right to expect more from my extra 200cc?
My boost gauge is showing 8psi with this spec, sound about right?
Any ideas welcomed people!