switching exhaust housings on CT-26 turbos (1 Viewer)

[jzilla]

Hi there,
Ok I have two CT-26 turbos, the one in the truck now is from the MR2.
I want to take the supra exhaust housing and put it on the MR2 so that it will mate right on the 13BT manifold.
To switch housings do I just undo the strap in the middle of the turbo and then pry the housings apart? And then the reverse to install on other turbo? Can I change the positioning of the exhaust outlet so that it is turned in the direction I want it (that called clocking?)?
Just want to make sure I don't wreck anything!
I could just use the CT-26 from the supra but I understand that it is too large, although I know there are one or two here using it. Also I know the MR2 turbo works well so I want to stick with that for now.
Thanks everyone for your input.

 

[cruiser_guy]

That is how you get the housings apart. You'll need to pull out the small indexing pin to allow a different clocking. Check CAREFULLY for potential rubbing of the wheel. I tried a little "mix and match" on the turbo on my FJ45LV and I ended up staying with the Supra CT26 setup due to wheels rubbing on housings. I can't recall which housing it was though. I had both the MR2 and Supra housings as well though I don't think I had the Supra wheels.

Make sure you keep the oil flowing DOWN on the drain when you play with the clocking. You may need to adjust both the input and output to acheive what you want/need.

The housing may be hard to get apart due to corrosion so take it easy so you don't crack it.

 

[jzilla]

So you are using the CT-26 on the 55? How do you like it?
This indexing pin, where is that? will I see it when I get the housings apart?
Maybe some heat from a torch would be good to get it apart? I'll take it down to the shop maybe.
Thanks Charles

 

[lynchmob]

If you are going to separate the turbine housing from one and put it on the other it will work. The compressor fan and housing on those two turbos is different and you can not mix/match parts on that side.

I recently had parts from MR2, Supra, and 12HT ct-26 turbos on the bench and will probably do a write up at some point.

Here is what I found while researching (may already be on here somewhere)

The turbine fan appears to be the same between MR2, Celica, Supra, and LC. Though the turbine fan is the same, the turbine housing which is what determines the turbine A/R is different for each model.

The compressor fan is the same between MR2, Celica, and LC - the housings are all different, but the fan will interchange because the fan wheel is the same size. I replaced a chipped compressor in a 12HT version with an MR2 version.
The supra compressor is the same diameter on the large side, but the fan blades have a larger diameter - so the supra fan will not work with the other housings with smaller fans.

I didnt figure out any info to determine A/R on the compressors or the turbines, but the trim for the smaller (LC, MR2) compressor wheel is 44. The trim for the supra compressor wheel is 48.

 

[jzilla]

Thanks for the information, glad to know it is not a problem to switch the turbine housings.
I won't be doing this for a few months, but want to have everything ready to go. A write-up would be great when you have time.
What is the best tool/method to use when separating the housings?
Also what do you suggest for cleaning out the oil passage? Some kind of spray or compressed air?
Oh and is the oil return/feed line the same on both?

 

[cruiser_guy]

So you are using the CT-26 on the 55? How do you like it?

CT26 is on the FJ45LV NOT the FJ55. The FJ45LV is a year or two away from road worthiness at least so I have no opinions at this time.

 

[Tapage]

If you are going to separate the turbine housing from one and put it on the other it will work. The compressor fan and housing on those two turbos is different and you can not mix/match parts on that side.

I recently had parts from MR2, Supra, and 12HT ct-26 turbos on the bench and will probably do a write up at some point.

Here is what I found while researching (may already be on here somewhere)

that would be amazing dude ..

If I get it correctly .. the Supra turbo will push more boost than the others .. ? how it's the turbine side compared to others .. ?

 

[jzilla]

I was thinking, why even bother changing exhaust housings? The bolt pattern is the same and you could just use the round supra gasket. I guess the downside is having the middle of the twin port from the MR2 in the way, so the exhaust gas would hit that.

 

[cruiser_guy]

If you look closely the MR2 turbo does NOT match well with the 13B-T manifold. You'll want to make a coupler anyways with the MR2 turbo.

 

[lynchmob]

that would be amazing dude ..

If I get it correctly .. the Supra turbo will push more boost than the others .. ? how it's the turbine side compared to others .. ?

The turbine fan between all of them is the same. The turbine housing on the Supra is visibly larger and Im sure its significant for the A/R value.

 

[lynchmob]

I was thinking, why even bother changing exhaust housings? The bolt pattern is the same and you could just use the round supra gasket. I guess the downside is having the middle of the twin port from the MR2 in the way, so the exhaust gas would hit that.

You could just use the supra turbo. Though opinions vary about how well it is suited others have used it with success.

My brother put one on his 3B conversion with a 13BT manifold and it worked well.

 

[Tapage]

The turbine fan between all of them is the same. The turbine housing on the Supra is visibly larger and Im sure its significant for the A/R value.

mmm means you need much more aire flow ( volume ) to fill it and make the same boost as you get with factory 1HD-T CT26 ..

How it's the CT from the Supra on the compresor side to the CT from the 1HD-T .. ?

 

[lynchmob]

mmm means you need much more aire flow ( volume ) to fill it and make the same boost as you get with factory 1HD-T CT26 ..

How it's the CT from the Supra on the compresor side to the CT from the 1HD-T .. ?

compressor wheel and housing size appears to be the same between MR2 and LC - The supra housing is a bit bigger and the wheel has more fan blade area.

 

[Tapage]

compressor wheel and housing size appears to be the same between MR2 and LC - The supra housing is a bit bigger and the wheel has more fan blade area.

mmm with a bigger compresor will be ready to make much more boost .