Searched and read many topics relating to this and tried each of the solutions found to no luck.
Boost sees 7lbs perfectly. No creep no spikes. No matter what I seem to try I cant get more out of it. Friends have very similar set ups and same turbo etc. and none seem to have problems with this

B18a1 stock.
walboro 255,
dsm 450's
T04E turbo
38mm wastegate
2.5dp to gutted cat and 2.5 pipe all the way back.

No leaks in or out. pressure tested the charge pipes to 22lbs and no leaks with boost gauge reading it correctly.
Tried multiple variations with boost controllers and different lines before and after the wastegate diaphram no luck. Changed WG springs with various springs from friends all rated up to 20ish lbs or so, still nothing.
Hondata s300 with boost cut off etc.

I'm sure there's other things Ive tried that someone will mention but cant think of them atm.
Runs great in every fashion at 7lbs. but looking for 14lbs before taking it to tune. really dont think its the limit of the turbo being how friends have it too running much more than 7lbs. Any help is appreciated.

 

what manifold and what rpm are you seeing the 7lbs?

 

Its a cast manifold unsure of the exact style but its close to a log. I see 7lbs at roughly 5500 and it holds steady 7 all the way to my 7200 redline.

Not sure if this is normal as its my first Boost project but it rapidly jumps to 5lbs around 4000-4200 rpm and then raises steady to 7 at the 5500. I would think its normal as everyone whos looked at it with me hasnt mentioned it being off.

 

what size turbo? u just listed the flange