Celica GT-Four ST165

And now I present a freshly rebuilt Gen 1 CT26 turbo (single entry), complete with a mild T04E/46 compressor upgrade, a 7M-GTE turbine housing swap, brand new seals, and full balancing.

See where the compressor housing inlet was bored out and slightly ported for the T04E/46 compressor wheel?

And here is the turbine housing from the Supra 7M-GTE CT26.

It is has a larger A/R than the original Celica 3S-GTE Gen 1 CT26, and will, therefore, allow a greater CFM relative to back-pressure than the stock housing. This may hurt low-rpm spoolup, but that can be offset with an unrestricted turbo-back exhaust upgrade.

I love clean parts, and so does my st165!

Yesterday, FedEx brought me a new manifold from Toyota. I really appreciate the lack of cracks.

Here’s the old manifold outlet—see the crack?

Then today, UPS delivered the injectors, all cleaned and flow-tested by RC Engineering.

Prior to the test, at 43 psi:

- 1 : 436 cc/min
- 2 : 429 cc/min
- 3 : 411 cc/min
- 4 : 428 cc/min

After the test, at 43 psi:

- 1 : 441 cc/min
- 2 : 440 cc/min
- 3 : 439 cc/min
- 4 : 440 cc/min

That will work just fine, and the two highest-flowing injectors will feed cylinders #2 and #3.