I have a 88 Turbo Supra w/the following mods

Apexi SAFC
550 CC Injectors
Manual Boost controller set at 18 psi
Stock ct-26 turbo soon to be upgraded
3 " Megan racing downpipe
No cats
3 " blitz exhaust
19" Wheels 245/40/ZR19 Front
Back 275/35/ZR19 Back
I run 12.89 quarter mile and have used a G Tech computer to estimate horsepower at 320 at the rear wheels and 360 foot pounds of torque.

Can other people post mods and what horsepower and quartermile times are. I hope with a upgraded turbo i should be over 400 horse at the rear wheels.

get ya a greddy 4row fmic and a walboro 255 along w/ that turbo upgrade and you could easily be over 400hp to tires, depending upon the turbo and what boost you set it at, after that id say about 264 cams w/ like a 3 angle valve job, should be between 450-475 with all that, but for anymore id do an engine rebuild to be able to hold higher boost and hp...
but hey...all of thats if i were you, it is your car...and, it sounds like a sick ride already!