Screwed CT26 not CT20 Turbo - Toyota Nation Forum : Toyota Car and Truck Forums

ETCdude1 · 03-23-2009, 03:29 PM

Hello. I am new to this forum and new to my 1992 MR2 turbo.
I just bought it --cheap, but it needs lots of work.

I bought (in haste) a new Toyota CT26 online for $300 only to find my car uses a CT20. I didn't do my homework. I screwed up. No returns.

The CT26 has a T3 flange. It does not fit my exh system.

Will the new CT26 turbo fit in the old housing of my CT20?

CT26

Ghostyman · 03-23-2009, 05:50 PM

That isn't a MR2 CT26 turbo. It looks like you probably got the LandCruiser CT26 turbo which won't work well for the MR2 even if you did get it fitted on.

The 92 MR2s use the CT26, not the CT20b. What is wrong with your existing turbo?

This is the MR2 CT26, for reference:

***MR2Jedi*** · 03-23-2009, 06:37 PM

I had a Supra CT26 Turbo. It had CT26 stamped on the compressor housing, but I don't know that all years Supra had those markings. The intake radius opening was noticeably larger too. It had just 1 pressure sensor outlet, like the MR2 CT26. That looks like it has 2 . That one also doesn't have the twin entry turbine housing like the MR2 either.
Need pics of the turbine side and the compressor wheel...

TheEngineer · 03-23-2009, 06:38 PM

i have a stock CT26 that i can sell you. Its got 125k miles on it and has only minimal side to side shaft play and no in/out shaft play. I was boosting fine before i removed it.

But like he said, what is wrong with your turbo you have

Ghostyman · 03-23-2009, 08:10 PM

That's not a Supra or MR2 turbo. You've got a Toyota CT26 turbo from a LandCruiser. That thing is designed for a 4.2L V6.

Part number is 17201-17040, you can look it up and compare to make sure that's the same turbo you have.

***MR2Jedi*** · 03-23-2009, 08:27 PM

Ah, mystery solved....

ETCdude1 · 03-23-2009, 08:48 PM

Thanks guys for the help. Car has 200K miles on it. I am working on the brakes and then turbo, then valves (measure and adjust). I got all new gaskets. It sounds like an exhaust leak or a noisy BPV. I am doing a restore. I am doing what I can without pulling the motor/trans.

I saw to many V8s get their buts kicked by turbos at the drag strip. MR2s are rockets and get good gas mileage.

I can probably sell on ebay and rebuild the old one.

Does it need machining for a rebuild? I saw a kit of $100 on ebay.

Here are some pics of the CT26 Turbo (told by seller it would work on MR2):

Ghostyman · 03-23-2009, 08:56 PM

Definitely won't work on the MR2 without a lot of work and even then it's probably not a good match for the engine.

If you aren't worried about more power, don't rebuild your existing turbo unless the seals are shot and it's leaking oil or has excessive shaft play.

If you want more power, look into ATS Racing's CT27 turbo. It costs ~$700 and bolts right on (it's a modified stock turbo). Or, go with something like a TD06 or T3/T4 with a manifold adapter and a bunch of custom fab work. I've got a CT27 on one of my 3SGTEs and it is far superior to the stock CT26. My other engine has a T3/T4 hybrid that I'm expecting big stuff out of.

Rebuilding the CT26 is a waste of time in my opinion. MR2 guys are always getting rid of them in working condition for <$100 when they upgrade. Speaking of which, I've also got an old CT26 sitting around but it's got a lot of shaft play... still boosted fine when it was on the car and I'll let it go very cheap if you happen to be interested. I still recommend either keeping the existing turbo or going bigger.

ETCdude1 · 03-23-2009, 09:34 PM

Thanks. I'll know more when I tear it out. I may be in the market for another turbo. lots of oil leaks that need to be located. Gotta get the brakes done. Gotta stop before I go.

Ghostyman · 03-23-2009, 10:44 PM

Most common oil leaks are valve cover, distributor, and rear main seal. Valve cover and dizzy are easy to change... rear main seal not so much. If you have any pics, post 'em.

TheEngineer · 03-24-2009, 11:03 AM

hey ghostyman, why did you say "t3/t4 with adapter and a bunch of custom fab work"?

I have a t3/t4 w/ adapter and it bolted right up to my downpipe, and my intake, and my hotpipe. Didnt really require any additional fabbing.

***MR2Jedi*** · 03-24-2009, 11:11 AM

Quote:

Originally Posted by TheEngineer

I have a t3/t4 w/ adapter and it bolted right up to my downpipe, and my intake, and my hotpipe. Didnt really require any additional fabbing.

Wow, I didn't know a T3/T4 would bolt up to the MR2 DP. 1 of the reasons I went with the CT27 was to avoid that type of fabrication. Do all the T3/T4's bolt to MR2 DP? Or just certain makes? I would think it would be universal.

TheEngineer · 03-24-2009, 12:22 PM

oops sorry didnt mean to say DP. I meant that it bolts right up to the exhaust with the DP from the kit. My bad. Cuz the t3/t4 is just that, it has a t4 outlet flange to the downpipe. So yea you need a new DP, but again its still bolt-in with the adapter and DP. No real custom fab needed. I got my kit from AutoLab

***MR2Jedi*** · 03-24-2009, 01:31 PM

Oh, OK. I don't guess I know what the exhaust flange looks like. I'm familiar with the manifold to turbo adapter looks like(is that what they call the T/3 part ?)
I don't suppose there's an adapter for T/4 to MR2 DP?

Ghostyman · 03-24-2009, 03:30 PM

Quote:

Originally Posted by TheEngineer

hey ghostyman, why did you say "t3/t4 with adapter and a bunch of custom fab work"?

I have a t3/t4 w/ adapter and it bolted right up to my downpipe, and my intake, and my hotpipe. Didnt really require any additional fabbing.

If all those fit up well then I guess the only fab work is the oil lines. I expected there to be more fitment problems with the intake and hotpipe because the adapter makes the turbo sit lower and it has a larger intake diameter. I don't have my MR2 right now so I haven't actually been able to look in the engine bay and see how it would fit. That's good news though, I'm glad those bolt up easy.