I need help!! Info on a turbo!!

[ct-12b]

Hi i just joined this forum for the sole purpose on getting some info on a turbo i just got my hands on.

I have a ct-12b turbo off a usdm supra. The questions that i have are as follow:

1.- The turbo has several places where it seems it has outlets and intakes... Two of them are single and are the same on both sides and one of them seems to have a screw on nipple type and one that seems to connect some type of hose. I need to know what these are. I take it they have to be oil inlet and outlet and i take it one of them has to be water. I need to know which is which!!

2.- What is the best efficient range of boost that this turbo is capable of?? By this i mean, how much boost can it produce and still be in it's efficient range.


Please, i will appreciate honest answers, I DO NOT OWN A SUPRA, I just got this turbo because it was available to me and am planning to use it on a 1.6 SOHC Honda engine but am lost about what these ports are on the turbo. I am not capable of posting pics on forums but if it's necesary I will email pics.

THANKS IN ADVANCE FOR YOUR ANSWERS!!!

Jack

[Bill UK]

Not sure about the CT 12B Turbo, I would have thought the connections would be similar to the CT26 Link Photo below is the CT26

[ct-12b]

Thanks for the very helpful info!! I knew that there was someonde bound to answer at least one of my questions. Thanks a lot !

[MA70-3.0GT]

Not wishing to rain on anyone's bonfire but wouldn't a turbo that size be a bit laggy on a 1.6 motor? I only say this because there's a fair amount of lag even with the exhaust gasses of a 3.0 flowing through so surely an engine just over half the size would produce not much more than half the essential exhaust gas to spin the turbine, at any given RPM?

I'm not saying it won't work because I don't profess to know everything about turbocharging, but my gut feeling is that a large turbo on a small engine would have major lag & possibly even struggle to get up to a speed where it can produce enough boost...
On the other hand it could well be that it will have a lot of lag (that's a given) & then when it does come on song it could be a HUUUUGE amount of fun indeed.

I for one will be interested to hear the outcome of your project & hope you'll post back about it, you certainly would seem to have mucho cohones to be trying this and I hope it goes to plan.

Best of luck, Dan.

[ct-12b]

Well, let's think about it...
1.- The ct-12B is smaller than the ct-26
2.- The ct-12b is utilized in a six cylinder, TRUE, BUT 3 cylinders make it spin, the other 3 make the other turbo spin; it'll go into a four cylinder, therefore an extra cylinder is involved.
3.- The ct-12b is actually a bit smaller than a gt-28. I have the comparisson specs but i suck at posting pics.

So My guess is... it'll actually be a good turbo for a 1.6 with 75.5mm bore and 90mm stroke and a 4.25:1 final gear ratio to reduce any potential lag.

Did I make sense??

[MA70-3.0GT]

Right, thought about it... Yep, perfect sense. The ct-12b is from the twin turbo then? I was under the impression that the turbo you were talking about was simply from a USDM 3.0 turbo but it's actually one of the units from the 2.5 TWIN-turbo isn't it?

In that case then I think you'll find very little problem with spool times or with the capacity of the compressor to produce sufficient boost for your engine (having effectively come from a 1250cc, 3cyl application). It's all in the interpretation see, If I'd known it was a tt blower I'd have kept my big yap shut (or simply put the last bit about posting back the results, speaking of which once you're up & running try & get a video on youtube or similar & let us know where to find it, I wanna see!!!).