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...
Among other things, Trial recommends to install this TREC (if i'm not mistaken thats whats its call) thing..
black box thing that helps to improve response and reduces the infamous altezza "turbo" lag problem..hehe...