CT 26 water cooling flow

[Otterav]

This is an age old issue, has been hashed out over and over, the only returning player is Mr D. and a couple of others who can't resist, myself included. I understand the diesel doesn't operate at stoch. ratios, but something I hadn't thought of is the difference between the Toyota 3B and lots of other diesels. The throttle butterfly valve, other diesels have unrestricted intake air, whereas the 3B has the intake butterfly, which limits air intake at anything at other than WOT, which my limit the cooling of excess air.
Oh well
eric

 

[cruiser_guy]

I understand the diesel doesn't operate at stoch. ratios, but something I hadn't thought of is the difference between the Toyota 3B and lots of other diesels. The throttle butterfly valve, other diesels have unrestricted intake air, whereas the 3B has the intake butterfly, which limits air intake at anything at other than WOT, which my limit the cooling of excess air.
Oh well
eric

One would think the buterfly valve would restrict cooling air but take your 3B up a hill. pushing it hard then let the engine do the braking on the way down and you'll see the EGT's drop pretty fast. You can drive the EGT's down to 150 - 200 F if you let the engine brake long enough (say 2-3 minutes).

 

[Tapage]

Why are still debating this simple issue .. I like the Toyota CT26 concept with water lines .. are you Mr. D trying to me block my water lines in my CT26 .. ? no ..

So I read those post arguing about water jackets .. with a big smile on my face ..

 

[Dougal]

are you Mr. D trying to me block my water lines in my CT26 .. ? no ..

Yes, I've sent some rust flakes over on that exact mission.

 

[jake2far]

You do that because very hot shutdowns are bad for every type of engine whether petrol, diesel, turbo or non-turbo.

The garrett aftermarket literature is aimed at the ricer market, diesels are such a small fraction of that that it almost avoids mention.
Most ricers are turned cold by the notion that garrett also make turbochargers for diesel engines and that most diesels are now turbocharged.

Here's a garrett GT2052V turbocharger which is designed solely for a diesel application. No water jacket. I've owned two of these.

Here's a GT2256V, again a turbo designed solely for a diesel engine. No water jacket. I have one of these in my spares box if you'd like some more photos.

Here's a holset HX35, again a turbo designed solely for use on a diesel engine. No water jacket. They are used by some ricers on petrol engines and survive fine.

Here is a garrett GT1749V. Again a turbo designed solely for use on a diesel engine and again no water jacket.

Maybe next time you're talking to your garrett contact, ask them why they make turbos without water jackets?

I really enjoy this as you are to easy, if, and I do mean if you will read Garretts "aftermarket literature" it does not state that they don't make turbos without water passages, I have never said that engineers who know what they are doing can't make turbos without water passages (been doin it for a long time). I have said and Garrett states if the water passages exist in the design they recommend that they be hooked up and they provide information how and why.
You have confused petrol with diesel and turbos with and without water passages to imply if turbos exist without water passages then diesel applications don't need them and you tell people who ask for help not to hook them up, even when the largest manufacturer of turbos states in their "after market literature"
(they really do make them so I hope they know what they are about, don't you?) to ignore the info provided.
You still have not addressed why my CT26 has water lines and how the water flows, showing me pictures of turbos without water passages proves what? that you can't hook them up because they aren't there, I get that, now connect the dots what have you proven? Why are you so set in your beliefs that you ignore the manufacturers suggestion?
In conclusion you have done something for me that I believe you are unaware of, because of this lively debate I have been motivated to find out exactly how and why the lines are there (timing was perfect for the install I'm doing), I have actually talked to several different companys about this situation and because of your stimulation to my ego I have actually learned something, so THANK YOU.
I will not post to this thread again because it has lived out its usefulness for me.
Current project retro fit a 1987 13B-T into 1985 BJ70 swap out turbo with my Garrett Turbo Glide.


Jim

 

[Dougal]

You have confused petrol with diesel and turbos with and without water passages to imply if turbos exist without water passages then diesel applications don't need them and you tell people who ask for help not to hook them up, even when the largest manufacturer of turbos states in their "after market literature"
(they really do make them so I hope they know what they are about, don't you?) to ignore the info provided.

Nope.
I have not confused petrol and diesel turbos, nor turbos with/without water jackets. I have stated quite clearly several times that the only diesel turbos with water jacketed cores are a legacy of using petrol turbo bearing cores.

I have stated many times on this board that you have two options. First is to hook up the water lines, in which case it must be done properly to allow the water to thermosiphon after shutdown. Otherwise it'll boil, vapourlock and has the potential for thermal shock when the water starts moving again.

Being a newcomer to this board, you've no doubt missed that. I suggest you do some research. This subject has been done to death on this board and many others.

The other option I advocate is to simply leave the water jacket disconnected. The downsides are nill provided the driver has at least some common sense.

You still have not addressed why my CT26 has water lines and how the water flows, showing me pictures of turbos without water passages proves what?

I have addressed that many times, your CT26 has a water jacket because all CT26's have water jackets. Toyota used that family of turbos on a large number of petrol engines, hence the un-needed water jacket on the diesels.

The manufacturers of course hook them up. Because they know stupid people will drive their vehicles in stupid ways and because it'd look silly if they didn't.

You can attempt to put any other spin you want on this topic, but I suggest simply reading the replies that have already been posted. Afterall, this post is answering queries with information which you could find just by scrolling up.

 

[Awl_TEQ]

I hesitate to post to this thread a year after the fact but I want to say that I found very useful info regarding turbo water jackets and 13b-t thermostat housings in here. The plumbing was confusing me and I believe I now understand. Despite or perhaps because of strong differing opinions this thread was quite useful.

Thanks all,
Kevin