cant be bothered reading the whole thred but mine does this exact same thing, at about 5k, then back to full boost, it drops to abot 10 psi on my gauge. 
I take it you all have uprated high pressure fuel pumps? This is right in the range where the standard pump is working hardest, and the feeling you have, especially if the car is pulling boost out would be fuel cut..
Again, its pretty obvious this has nothing to do with the map, otherwise ALL of the cars with that same map would have the problem..
could the guys with revo select switches turn the fuelling downto counter that and see if it is still there. thats hould help show wheter that is the cause
Im running rich as it is!
If you are running rich with F9 then perhaps you have some hardware protection mapping taking place because you are actually running too lean an AFR for your HW setup and the ECU is having to richen the AFR mixture up because your EGTs are getting too high.
In this case it would actually be beneficial to:
a) Lower your fuel setting (more fuel will mean a cooler burn). If you are doing this without a HPFP I would recommend lowering your boost as well to reduce the strain on the standard HPFP.
b) Increase timing a little if you can (also lowers EGTs)
I think the problems you are getting can most likely be put down to that you may be running settings which are too aggressive for the HW you have installed (no HPFP). I am at stage 1 and can see already that the HPFP is being pushed to its limits and that is without any other HW upgrades. As you are running a CAI and exhaust already; the demand on the HPFP with aggressive settings will simply be too much and result in fuel cuts and misfires. This is why I will be purchasing a HPFP after my CAI is intsalled.
I would really recommend that you invest in getting a VCDS cable as I am sure the problems you are having will become obvious to see.
