The Toyota 3SGE series engine can handle up to 300hp with out any internal modifications.
The 3SGE.3SGTE series motor is one of the most innovative design in the Toyota family of engines. The engine has the potential of upward of making over 900hp. The engine was the same one Rod Millen used in the record breaking run in the AWD Celica at the Pikes Peak Race. The combinations of performance engineered parts and the proper tuning can make some serious realiable hp. My Turbo Celica is an daily driver with A/C, full interior and audio system.

Front view with custom 6 point roll cage installed and Spearco front mount intercooler.

Turbo system #1with stock 3SGE engine internal making 250hp@15psi to the wheels with stock Supra CT-26 turbocharger mounted on All-trac cast manifold

Turbo system #2 with Turbonectic 60-1 T4 making 400hp@18psi to the wheels

Custom equal lenght manifold w/ Turbonetic Deltagate wastegate

Front view of the massive Turbonetic 60-1 compressor wheel inlet.

Under view of the complete 3" mandrel bend down pipe and exhaust system. Front mounted Spearco intercooler.

Clutch #3 w/ burnt disc and broken pressure plate retainer

Side view of turbo manifold and the external wastegate downpipe..

Old School Sony XRU-770 A/V deck, Greddy Profec,Rebic,Simulator, and Turbo Timer

Front view Spearco Intercooler and hood vent

The turbo system

Sparco Pro2000 seats

Waiting to race

Close up view 60-1 T4 turbo and the ETG sensor mounted on the manifold

Interior view with the 6-point roll cage

MSD 6BTM ignition box. AIC (2) 550cc Lucas injectors

Roll cage install with the complete interior removed

Bottom view of the transmission and the wastegate downpipe

Interior without the dash in place

Staging At The Las Vegas Motor Speedway

The installation of the 6 point weld in roll cage with the interior striped to the metals.

Other Project: 1990 Mazda Miata 1.6

Here's a manifold I made for a Garrett T3 turbocharger from a Nissan 300ZX in a Maita.

This is what my manifold looks like next to the stock maita headers

1990 Miata 1.6 liter T3 turbo making 225@15psi

Project 1995 Miata1.8 Turbo T3/T4 hybrid making 285@15psi

This was my first turbo setup with Stock Supra CT26 turbo and stock Alltrac manifold.