The 7mgte Bolt-On Turbo Catalog

BigKO

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Well for a typical 4 cylinder with a firing order of 1,3,4,2:
2 and 3 would be paired
1 and 4 would be paired
Each pair would join and feed a separate side of the twin scroll.

For the 7M to be paired into 2 separate inlets for a twin scroll:
With a firing order of 1,5,3,6,2,4:
1,2,3 would be paired
4,5,6 would be paired
The stock exhaust manifold already achieves this, it has a center divider pairing off the 2 sides...
Though the CT26 turbine housing does not mate up with an equivalent twin scroll design. (At least the Supra CT26)

There is a CT26 turbo for another vehicle out there that did utilize an early twin scroll turbine design though.
The 3SGTE engine received this style turbo.
http://www.mrcontrols.com/primers/turbo.htm
Though the passages are too small to be suited for the amount of airflow needed on a 3.0L engine.
Yes, I'm glad you pointed out that the stock manifold already does this.

Perhaps someone here who was CNC skills can recreate this ebay unit, or we can use the one I've linked below. I think this would make an affordable, cast, T-4, and twin-scroll manifold setup without paying an arm and a leg or having to do extensive custom work.

https://www.ebay.com/itm/CT-26-Divided-Turbo-to-T4-Divided-Countersunk-Manifold-Flange-Adapter-CT26-MR2/132230654252?hash=item1ec98fa92c:g:rK0AAOSw8d5ZRZOW&vxp=mtr
 

3p141592654

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Thanks for the education. Interesting to know this has been understood for decades. I found this video helpful.
 

Piratetip

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Yeah the twin scroll is the way to go if at all possible.
 

Zazzn

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So I was talking to Performace Techniques...

Interesting stuff, they offer the larger exhaust wheel and exhaust turbine along with machining the compressor housing to put on a bigger compressor. I asked about a billet 62 precision wheel they said they can do this. All this makes me believe 500-550 WHP would be possible on this CT26 bolt on. He said about 750$

So since picking up the ITS (suprasport jr) I also picked up an upgraded 60-1 CT26 bolt on. I'm really about using the stock oil lines and stock everything simply to keep the looks stock in this case.
 
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suprapilot

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So I was talking to Performace Techniques...

Interesting stuff, they offer the larger exhaust wheel and exhaust turbine along with machining the compressor housing to put on a bigger compressor. I asked about a billet 62 precision wheel they said they can do this. All this makes me believe 500-550 WHP would be possible on this CT26 bolt on. He said about 750$

So since picking up the ITS (suprasport jr) I also picked up an upgraded 60-1 CT26 bolt on. I'm really about using the stock oil lines and stock everything simply to keep the looks stock in this case.
On the stock shaft you can not go bigger then a 57 trim or they go bad very veyr fast. The big compressor with the small turbine wears out bearings and can break shafts. You would need to send it to Munro http://www.munroracingturbochargers.com.au/performance.ct26.html

On Fakebook I fallow them. They did a CT26 with a larger turbine and ball bearing along with the latest billet wheel.
 

Zazzn

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On the stock shaft you can not go bigger then a 57 trim or they go bad very veyr fast. The big compressor with the small turbine wears out bearings and can break shafts. You would need to send it to Munro http://www.munroracingturbochargers.com.au/performance.ct26.html

On Fakebook I fallow them. They did a CT26 with a larger turbine and ball bearing along with the latest billet wheel.

They do not use the stock wheel on the exhaust side when you use the 30% higher flowing wheel. Also, I've heard that story once way too many times. I have seen several CT26's with larger than 60-1 last for a very long time, it all came down to the rebuild and the balancing.
 
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suprapilot

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They do not use the stock wheel on the exhaust side when you use the 30% higher flowing wheel. Also, I've heard that story once way too many times. I have seen several CT26's with larger than 60-1 last for a very long time, it all came down to the rebuild and the balancing.
There FB page shows much more then their website. They did a nice BB conversion and larger turbine for a MR2 Race car.
 

Zazzn

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Just updating this thread. The 57 I bought had a ton of slop, but it made 301 whp At 10 psi and 357 wheel hp. I then send it as a core to albert medes and paid way too much for a billet 57 upgraded ct he makes with the 30% more flow exhaust wheel. Installed the supporting mods and a spearco ic and a ms3 pro. So far made 360 who and 406 tq on a mustang Dyno at 22 or so psi. Only 13 degrees timing on e85. Ran out of time tuning and have to sort some other things out. Car feels really good but was surprised it was so low. May have to use the boss turbo after all...
 

tissimo

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Probably just low timing. At least I hope so, as I'm in the same boat, lol.

I haven't dyno'ed yet but 12* of timing at 26-27 psi of my 61mm feels like 400ish hp. Seems to be using 500+ hp of fuel (80% duty on 1000s with e75).
 

SupraTrbo89

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They do not use the stock wheel on the exhaust side when you use the 30% higher flowing wheel. Also, I've heard that story once way too many times. I have seen several CT26's with larger than 60-1 last for a very long time, it all came down to the rebuild and the balancing.
I just had Albert rebuild a DM 57trim for me and he upgraded the thrust washer from 270 to 360. He said he knows of people who have run 20 - 24psi for years on them. But I agree, build quality come into play if you are pushing it that hard.
 
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BigKO

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I just had Albert rebuild a DM 57trim for me and he upgraded the thrust washer from 270 to 360. He said he knows of people who have run 20 - 24psi for years on them. But I agree, build quality come into play if you are pushing it that hard.
Do you have his contact information? Considering going an upgraded ct if it will hold together.
 

SupraTrbo89

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Do you have his contact information? Considering going an upgraded ct if it will hold together.
I do not have his contact information however his instagram name is Albert Meade and his handle (if thats what its called) is albert_trd. I started following him and then DMed him to ask if he wanted to rebuild my turbo. I know he welcomes the work. Not only did he rebuilt/ upgrade it for me but he also cleans and paints everything so it looks brand new when you get it back. He can also ceramic coat it/ polish it/ and other upgrades etc. You just have to ask. The price was reasonable also, but the one thing that sucks is paying for shipping there and back but you would be doing the same thing if you went with Driftmotion.
 
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