CT20 turbine - Toyota Nation Forum : Toyota Car and Truck Forums

***MR2Jedi*** · 08-18-2008, 10:59 PM

I'm rebuilding my CT26. I was wondering if the CT20 turbine wheel can be used in the CT26 ?

MR2 Guru · 08-19-2008, 07:19 PM

I may stand to be corrected here, but I believe the bore of the CT20b turbine housing is larger than that of the CT26, which may cause a problem with the turbine wheel being used in the CT26 housing.

Were you considering removing the turbine wheel from the shaft, or using the whole compressor/turbine shaft assembly inside the CT26 housings? I would not suggest using the turbine wheel alone without rebalancing etc., which would eventually cost more than acquiring a nice CT20b.

My opinion would say the best bet for a slightly more efficient turbo, with half the cost of the CT20b would be a Supra CT26 hybrid. The Supra hybrid is a decent/cheap upgrade. It is not quite as good as the CT20b, but about anything is better than the stock MR2 CT26.

Hope this helps!

***MR2Jedi*** · 08-19-2008, 07:52 PM

It helps alot actually. I'm having my shaft balanced with a new stock compressor wheel, and thrust collars for this rebuild and re assembling the turbo myself. When shopping for a new compressor wheel I found that the Supra CT26 has a larger inducer but same size exducer. I don't know about the turbine wheel.
So is the Supra CT 26 a direct bolt up to the MR2 exhaust manifold? I've decided to keep my 2 close to stock as possible while getting as much HP out of it as I can.

MR2 Guru · 08-19-2008, 10:29 PM

Well, the Supra CT26 isnt exactly a "direct bolt-on" affair. The Supra has the single entry housing vs. the MR2 twin entry housing which makes that a scratch, but you can use the MR2 Turbine housing on the Supra turbo to make it a direct fit. You will have to re-clock the turbo, and make sure to line up the WG Actuator correctly; it can get hung up and hold the flapper door shut, which is never good! LOL

ToyotaTechGeek · 08-25-2008, 07:01 PM

why not just buy a CT20?

***MR2Jedi*** · 08-25-2008, 07:29 PM

Quote:

Originally Posted by ToyotaTechGeek

why not just buy a CT20?

Well,I came across a new CT20 turbine and I'm reuilding My CT26 ,so I though while I have it apart, I might be able to use it and flow more exhaust. The rebuild is just to get me by until I finally decide which turbo I'm gonna go with.
I'm either gonna go CT27, GT28, or T3/T4. I would just rebuild a CT20 if I could find one at a decent price.. The used ones I've seen, the guys are asking $750.00+. I think thats too high for a used turbo I have to rebuild. ATS only wants $700.00 for their CT27..