"Load" is a funny thing... It's the amount of air your MAF sensor reads when compared to the rpm.
So, its actually possible to run less boost and have higher loads
It makes sense that after installing a dp your power does not increase at all, as you are targeting a certain power limit/load. Did you find the boost went down afterwards?
Timing is done separately to your load calculation, so if you add timing, you'll see power gains
I've been hitting 2.2-2.3 pretty regularly for the past 18 months, but that's with some ethanol in my tank... That seems to keep torque under the "safe" limit of 375ftlb (about 500NM) for stock block... That's unverified obviously, but since that limit has been put in on MSF, it has stopped a lot of pistons appearing in open air
From what I've seen, a k04 is rarely able to flow more than about 280-290g/s so if you're above 260g/s I doubt you'll see any major changes.
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