Bad language form on my part.
Just for exercise, I'd unbolt the plate from your intake, tape a filter on there(or to the gasser throttle body if you have it), and make a pass to see if smoke is gone.
2.25 in.Hg isn't equal to 2.25 psi. It is about 1/2 that. 29.92 in.Hg equals 14.7 psi.
Oh yeah

........so I suppose a better intake would hardly even be noticeable, but of course I'd rather not have any restriction at all.
Yeah this is weird, my top speed is around 70mph and it's smoking black the whole time. Before turbo I could go 80-85......kinda. Bottom end power isn't too bad though.
I thought the fat exhaust would help a lot but it just makes it really loud.
I have 2.5 from the turbo back, then splits to dual 2.5 under the back seats and it's not that loud at all with the turbo.
My build is nothing like yours but for some perspective... if i keep the boost around 15 psi my build will make my 4-door jetta get up to 93mph quick and climb to 115mph quite slowly after that at wot (20 psi) but it will get there. I've always ran out of road, i don't know where the limit is.
synopsis of my mods are:
aaz head
1.6 bottom end
limitless boost on a T3
Gov mod (disabled)
fuel screw turned in as far as it will go
stock nozzles
timed to who knows what, really advanced - i know that much.
2.5 inch exhaust as i mentioned
an intercooler (8tallx3deepx27long)
tdi alh intake (which i think is restrictive but maybe not (i cut it at the elbow)
my rabbit would go like 75 top speed when it was a n/a 1.5, now it goes almost 140 mph @ 25 psi (ran out of road like ed) before it hits the governor. except, unlike ed, my car is slower to 80 then it is to 100, once i grab fifth gear, it just starts pullin like a mother. i really dont even know where the top ceiling of my governor is, really high, i know that. my GTI will pull till like 6000 rpms on the tach, my diesel pulls till who knows when, and you can get more mph out of every gear between shifts with almost identical transmissions (9A in the GTI, AUG in the diesel.)