when i'm done tuning mine, i'll hit u a pm and u can come check it out cool?
mine is a single cam turbo though...but i have the same if less mods than u ststed.
have an SAFC-II for 'management' and the only real 'power upgrades' are a boost controller, FMIC and 3" exhaust
a bigger turbo wont necessarily sort out ur issues of 'not running well'...if anything, it'll just make u ran like crap with lag
i suggest getting ur car checked out completely..
*u have a higher pressure fuel pump and regulator...but do you have high pressure lines? and the walbro pump (unless internal) has to be gravity fed or from a surge tank...they aren't designed to work other than those to set-ups externally...trust me.
*why the twin disc copper tho? i think thats overkill, a nice 6puck ACT street disc would have worked fine...cause ur basically still stock..
*dont try tuning the NEO without some sort of A/F monitoring/data logging...or else it wont make sense, and u may fcuk the motor up... if u get a narrowband (regular A/F gauge) dont make large adjustments, i.e. leave room for error, and i'm not advising u do this 100% either...
get the car dyno tuned.
*check ur spark, all that boost, fuel and no spark means nada...get some good plugs, probably heat range 7 NGK Iridiums...
*dont max out ur injectors by running as much boost as the wastegate allows...
try seeing if the 25DET rail adn injectors would work on yours, not sure 100% or atleast the injectors...
*clean/replace ur sensors, maybe the TPS is dirty? or the MAF? if u get a 25DET or VG30DETT MAF, that'll be excellent as well..
just my $0.02...have alot more experienced 2nrs in here who can help u out..
TriniGT, fafrumlosin, dry etc..