Not enough Turbo??

As of right now its on 15psi @ Sport(300hp) and 18 @ Sport# (367hp)

Mods:
Blouch Performance 20g-xtr turbo
Grimmspeed tmic
MXP headers and uppipe
Invidia catless downpipie
Cobb sf ram intake
Cobb 1000cc injectors
Cobb ebcs
Cobb access port v2
DW fuel pump
GFB fuel pressure regulator kit
IAG aos
SPT strut tower brace
SPT Lower chasis brace
SPT short throw shifter
SPT Group-N trans and motor mounts
SPT Group-N pitch stopper

MainFrame said:

Not gonna happen.. you would probably get close on e85, but not on 93 unless it's a really high reading dyno. Not sure what you mean by pushing the turbo "too hard".. it simply can't move enough air to make that kind of power.

Click to expand...

You have a larger turbine wheel than the traditional "20G" turbos, and the better compressor wheel, but I still don't think it's going to be enough for 400whp on pump fuel. 20G turbos were always a "350whp" setup, give or take. I'm not sure how much of a limitation your stock block was on your ~365whp tune; I'd expect in the 370-380whp range for that turbo on 93. The BEST estimate for what you will likely see on that setup is going to come from the person calibrating the vehicle; they know their dyno and how the parts used typically react.

I didn't tune your car, so you'll need to consult the previous tuner, but I'm guessing that charge cooling (TMIC) was your main limiting factor last time. If you need to stay TMIC for some reason (e.g., you don't want to delete/replace your OE front crash beam), you can look into water/meth injection or E85, both of which in addition to adding octane (which allows you to run a more aggressive calibration alone), offer the side benefit of chemical intercooling as well.