Its not much of a surprise to me. I've worked out a similar conclusion about boost efficiency of the stocker mostly through experimentation. Most of my TBE TD04 pump gas tunes run about 17-17.5psi through the mid range and taper off to just over 13psi by redline. On race gas I've run the stocker to 21psi in the mid range and as high as 15psi by redline. A bigger TMIC really helps for race gas tunes, however, as those higher boost levels tend to start heating up the stock TMIC.
Thanks
-- Ed
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