the problem u have right now is because u still using the stock cps piping...change to bigger piping for a better flow, i think u will get a higher hp...
the difference of dynojet and dyno dinamics in readings are not that far off....dynojet about 25% while dyno dinamics at 30%..the lowest i think is dastek which i cant remember the load...
for me, i dyno'ed my car with Jai of Powerzone, im using NA mitsu engine, and he's one of the frontrunner in musc drag in 2010-2011 4g15 mitsu...good tuner i suggest u...