3S-GE to 3S-GTE conversion Options

[bdawgbp1]

Does anyone know what all is involved in converting a 4th gen 3S-GE (American version rated at 135 HP, 125 ft/lb torque) to a 3S-GTE? I've gotten my hand on a 3S-GE out of a 1988 Celica GT-S that was rebuilt 90k miles ago and I want to convert it to a 3S-GTE. Any ideas? Thanks a bunch!

[blu94gt]

The engine was rebuilt 90k miles ago - don't know if it has forged guts - I doubt it - but it runs good and strong. Doesn't leak or smoke and doesn't burn oil. Not sure of the tranny but it's AT with the sport/cruise shift option on it. As far as the ECU is concerned can I flash the factory ECU or do I need some kind of standalon air/fuel management? Thanks for all the input.

I would definitely, DEFINITELY recommend not using that old AT, and finding a 5 speed that will match up with the motor. I highly doubt you can flash the ECU and have good luck, you'll definitely come out ahead using a stand-alone.

The more I look up stuff on this conversion, I have to say I think you'll be ahead to sell the motor and swap a 3sgte. By the time you spend the money getting your motor into the shape to be able to handle any kind of power reliably, you'll be able to swap a stock 3sgte with the appropriate tranny and ecu.