built sr20, no power?

[sr20boostn20]

im looking for a little advice on my sr20build here it is so far, with this set up it was dynoed on a dynodynamics dyno and made 325whp and 315ft/lb tq.

this is the setup.
redtop sr20det bored honed
eagle rods
wiesco 9:1 compression pistons .020 over
stock crank
hks 272 cams
crower springs and retainers
greddy 1.5mm headgasket
greddy intake manifold, oil pan
blitz intercooler
sard fuel rail, fpr, and 800cc injectors
tial 50mm blow off vlave, 38mm wastegate
hotshot manifold
custom t3/t4 garrett with a t04e turbine wheels in a t3 housing and a t04e compressor housing
custom 3in down pipe to hks downpipe, testpipe and hks hi power exhaust
hbc manual boost controller
koyuo rad electric fans
vlsd
4 puck bronze unsprung with a hd pressurplate
no ac no powersteering

tuning on a power fc d jetro

as i said the car made 325 whp and 315ft/lbs tq at 18 psi, full boost dosent come on till 4200 rpm, and it feels like the motor makes no low end power. The cams apper to be nearly retarted, the nut on the cas is righ t at the bottom. At wot the injector duty cycle is at liek 96% and its pulling out 41 deg igniton timing. the car backfires often and some times bogs between gears. theres only about 3500 miles on the motor. I have been told the igniton map is way off. what should i do. any help is appreciated