advice on a turbo, for a built 5sfe Options

[celica101]

I need your opinions. Here is a list of the cylinder head work I am currently having done to my car as well as having the bottom end rebuilt with forged pistons, connecting rods, and the whole shibang.

Pocket Port
Competition Port & Polish
Deshrouded & Polished Combustion Chambers
Back-Cut Valves
Radiused Blend Seats
Competition Three-Angle Valve Job
Hand-lapped & Vacuum-Tested Valve Seats
Cylinder Head Deburred & Blueprinted
Combustion Chambers C.C.'d
Detailed Matched Intake Manifold Fully Ported to Head
Matched Throttle Body
Match Port Exhaust Manifolds
Port Faces Lapped Flat
Decks Milled & Lapped
Combustion Chambers Welded & Reshaped (clover-leaf pent-roof design)
Intake Valves Lightened
Rocker Arms Lightened
Fully Balanced & Blueprinted
Valve Spring Shims

Now what I want to know is what turbo you guys would suggest for between 400- 550 horses at 2 bar of boost. Also an fmic

thanks
Chris

[SpedToe169]

Its all totally possible if you engineer the package right. What you're going to have to realize is that you absolutely will not be able to make that much power on pump gas. Not a chance. Anything above 12psi or so on a moderate compression motor is pushing it on pump gas. 2bar aint gonna happen on anything short of 114octane.

I think with all the head work you're doing a head swap will not be necessary. The valve angles will not be optimal, but everything else you're doing will help compensate for it.

My turbo suggestion would be a Garret GT30. It will easily flow enough for 500hp at 28psi-30 psi. If you plan on running pump gas and want to be realistic , then I'd go with a GT25 and expect about 340hp. I'm basing all this on the turbo size calculator software available from Roy Hall Turbos in Austrailia.