ST205 3SGTE Turbo into ST202 Options

[thedrunkfish]

There is and online auction im looking at for a ST205 3SGTE Turbo, this claims tthis manifold and turbo will bolt straight on to an st202 celica. Is this true and will there need to be any other mods to the ST202 to get it working? (It is a CT26 Turbo and manifold)

[scothaniel]

Rods on the 3SGE are the same as the 3SGTE, so no worries there. The lower comp pistons from the ST205 are direct replacements, and they are fairly cheap ($100 USD) though not as strong as the forged aftermarket pistons. You dont have to swap the pistons to run a turbo, but you'll be limited to around 5 or 6 psi of boost, instead of 16-18 psi.

The stock 202 ECU will also handle low boost, and I believe there's a Greddy Emanage for the 94-99 3SGE. The stock fuel pump will handle low boost levels too, but that ST205 pump would be really nice to have.

Oil and water lines will need to be fabricated, which isn't too difficult. You can use the water lines going to the throttle body, and tap into the oil pressure sensor for oil feed. Then buy the ST205 oil return lines, including the connector at the pan.