[marting]

Hmmm.. what would be the disadvantages of having a turbo that is a bit to big? To much boost? Only boost at high revs.?

[Dougal]

Originally Posted by marting

Hmmm.. what would be the disadvantages of having a turbo that is a bit to big? To much boost? Only boost at high revs.?

It'll give less boost in the low and mid range but will give more top-end power. Yes it's another compromise.

If you disable the wastegate, a smaller turbo will give you higher boost than a big turbo.

[marting]

I see.. well i'm not really after to much top end power.. would be nice to have full boost at ,say 1500, and still be able to cruise at 2400rpm without too much boost..


This choice is proving difficult..I have found GT2560R's that you recommended but they are a bit expensive,, (I'm cheap)
I thought this one had pretty much the same specs.

I'll keep looking around..

[Dougal]

Originally Posted by marting

I see.. well i'm not really after to much top end power.. would be nice to have full boost at ,say 1500, and still be able to cruise at 2400rpm without too much boost..


This choice is proving difficult..I have found GT2560R's that you recommended but they are a bit expensive,, (I'm cheap)
I thought this one had pretty much the same specs.

I'll keep looking around..

A similar turbo to that one but with a slightly smaller exhaust housing will work fine.
How much boost you use at cruise depends on engine load, my vehicle runs 9psi boost when cruising at 100km/h, the EGT's run around 430 deg C upstream of the turbo in this situation. But planting my right foot delivers 20psi at that rpm.

Unlike a petrol engine, boost at cruise doesn't hurt fuel economy on a diesel, it actually helps a little.

[marting]

Hows about this? If you scroll down the specs are listed..
eBay Motors: TD05 H 16G TD05H TURBO+BOOST CONTROLLER LANCER ECLIPSE (item 270248890759 end time Jun-29-08 16:00:43 PDT)

[marting]

nah.. hang on.. it's even bigger..sorry.

[marting]

Originally Posted by Dougal

A similar turbo to that one but with a slightly smaller exhaust housing will work fine.
How much boost you use at cruise depends on engine load, my vehicle runs 9psi boost when cruising at 100km/h, the EGT's run around 430 deg C upstream of the turbo in this situation. But planting my right foot delivers 20psi at that rpm.

Unlike a petrol engine, boost at cruise doesn't hurt fuel economy on a diesel, it actually helps a little.

How many different exhaust housing sizes is there? I can find t3/t4 with A/R 50.. really cheap on e-bay

[Dougal]

Originally Posted by marting

How many different exhaust housing sizes is there? I can find t3/t4 with A/R 50.. really cheap on e-bay

The size sounds good, I can't vouch for the quality.

[marting]

THE SEARCH IS OVER!

I have bought a turbo.. Garrett/Nissan... was supposed to be sort of in between a GT25 and a T3.
From a singel-turbo 300zx

I honestly dont know A/R figures and stuff... It looks big enough. Hopefully not too big. The guy i bought it from sells lots of turboes and has tried "everything" so i followed his recommandations (an enthusiast not a vender)
Lets hope it does the trick!
It's oil and water-cooled.
I got a XS pop-off valve too.

[Dougal]

Originally Posted by marting

THE SEARCH IS OVER!

I have bought a turbo.. Garrett/Nissan... was supposed to be sort of in between a GT25 and a T3.
From a singel-turbo 300zx

I honestly dont know A/R figures and stuff... It looks big enough. Hopefully not too big. The guy i bought it from sells lots of turboes and has tried "everything" so i followed his recommandations (an enthusiast not a vender)
Lets hope it does the trick!
It's oil and water-cooled.
I got a XS pop-off valve too.

I hate to put a damper on your enthusiasm, but I had one of those turbos and sold it. They're not suitable for diesel use as they can't produce boost at low flow without surging.
It's called a T25G.

The compressor wheel has a very high trim (intake diameter is very close to the overall wheel diameter) which allows the boost to surge back through it when you try to get high boost at the rpm that diesel engines run. This surge over time damages the compressor blades, when they fail they head into your engine.
The T25 I'm currently running is a 60 trim which has a 40mm intake, that one is 74 trim which has a 44mm intake.

[marting]

....hehe.. damn!

So are you saying it's a NO-GO?

I'm sure i could swap it for something else...It sort of feels like you know what you are talking about Dougal..

[Dougal]

Originally Posted by marting

....hehe.. damn!

So are you saying it's a NO-GO?

I'm sure i could swap it for something else...It sort of feels like you know what you are talking about Dougal..

Yes it's a no go. But on the bright side, you should find plenty of ricers who'll be happy to swap a normal T25 for the T25G.
They're rumoured to flow more than a T28, but I haven't found any compressor maps for them.

[marting]

Yeah.. we'll see.. I will have to talk to the guy I bought it from.. I asume he will let me cancel the buy if I want to.

Well... F##K!



The search continues. I'm getting confused with all the numbers and sizes.. What about this then?
eBay Motors: T25/T28 TD04-H TURBO CHARGER INTERNAL WG +FLANGE SET (item 380040192552 end time Jun-30-08 15:01:34 PDT)

[Dougal]

Originally Posted by marting

Yeah.. we'll see.. I will have to talk to the guy I bought it from.. I asume he will let me cancel the buy if I want to.

Well... F##K!



The search continues. I'm getting confused with all the numbers and sizes.. What about this then?
eBay Motors: T25/T28 TD04-H TURBO CHARGER INTERNAL WG +FLANGE SET (item 380040192552 end time Jun-30-08 15:01:34 PDT)

Well on second thoughts, if you only want to run low boost (like single figures in psi) then the T25G will most likely cope well. I was planning to run 15-20psi which is why it was very unsuitable.

That Ebay one is what you're looking for. Similar exhaust turbine to the T25G, but a bigger compressor wheel with a smaller trim.

[marting]

I will run below 10 psi. Like an original 12HT i guess..
I just talked to the guy, and he also said that it would be no problem with low boost..And that he sold it to me because i said i would run low boost..wich i did...
The wastegate-spring feels pretty soft so he said it's probably set somwhere around 8 or 9 psi.

I'm keeping it.

[Dougal]

Originally Posted by marting

Yeah.. we'll see.. I will have to talk to the guy I bought it from.. I asume he will let me cancel the buy if I want to.

Well... F##K!



The search continues. I'm getting confused with all the numbers and sizes.. What about this then?
eBay Motors: T25/T28 TD04-H TURBO CHARGER INTERNAL WG +FLANGE SET (item 380040192552 end time Jun-30-08 15:01:34 PDT)

Well on second thoughts, if you only want to run low boost (like single figures in psi) then the T25G will most likely cope well. I was planning to run 15-20psi which is why it was very unsuitable.

That Ebay one is what you're looking for. Similar exhaust turbine to the T25G, but a bigger compressor wheel with a smaller trim.

[marting]

[marting]

It looks like the center-part of the turbo can be rotated.

Is there a particular way it shold sit? I'm thinking about oil lines an stuff..Since the oil-feed goes through a small hole and the return is much bigger, should the return point upwards so the whole "chamber" is full of oil?
I't looks as if I mount it the other way around, oil will just run right through without even touching the axle?

[Dougal]

Originally Posted by marting

It looks like the center-part of the turbo can be rotated.

Is there a particular way it shold sit? I'm thinking about oil lines an stuff..Since the oil-feed goes through a small hole and the return is much bigger, should the return point upwards so the whole "chamber" is full of oil?
I't looks as if I mount it the other way around, oil will just run right through without even touching the axle?

You need to rotate it (some call it "clocking") so the oil inlet is at the top and drain vertically below it.
Turbos use labyrinth seals to keep the oil in, they will leak oil into the inlet and exhaust (making lots of blue smoke) if the oil can't drain out easily.

The oil in the top port will be spread along the shaft and to the journal bearings, from there the whole centre section is open to drain out the hole in the bottom.

[bigluxs]

Originally Posted by marting

forgot the picture

hay same turbo i just put on my HJ60

http://forum.ih8mud.com/60-series-wa...ing-35s-2.html

[marting]

Hey Bigluxs! That looks good, I see you have left your manifold in it's place.. i will flip mine around.. fabrication of adapters have started.
But I'm not sure it's the same turbo..(infact after searching for turboes for a couple of weeks I'm now convinced there aren't two alike in the world) Accorcing to "dougal" mine is a T25G
And yours is a T03 ?
They look really similar though..

What did you do with the hose from the fuelpump to the inlet on the intake manifold?

And what did you do with the engine-breathing pipe (from valve-cover to intake)?

I'm very interested in seeing some more pictures of your plumbing

[Dougal]

Originally Posted by marting

Hey Bigluxs! That looks good, I see you have left your manifold in it's place.. i will flip mine around.. fabrication of adapters have started.
But I'm not sure it's the same turbo..(infact after searching for turboes for a couple of weeks I'm now convinced there aren't two alike in the world) Accorcing to "dougal" mine is a T25G
And yours is a T03 ?
They look really similar though..

What did you do with the hose from the fuelpump to the inlet on the intake manifold?

And what did you do with the engine-breathing pipe (from valve-cover to intake)?

He's got the T3/T4 that we were talking about on the other page. If you click the little arrow next to your name in the quote, it takes you to the post he quoted from.

[marting]

Aaaahh I see.. hehe ... Yeah i guess that is the one i should have too.. But I'll go with the one i bought now..maybe it works great?! If it turns out to be hopeless the seller will get me something else..

I still wanna see your plumbing though..if anyone can give me links to other plumbing-pics it will be much abliged.

Doug! Any idea on what boost the non-adjustable wastegate on my turbo is set at? I'm guessing 8 psi ? whatyathink?

[Dougal]

Originally Posted by marting

Doug! Any idea on what boost the non-adjustable wastegate on my turbo is set at? I'm guessing 8 psi ? whatyathink?

That'd by my guess to.

[Tapage]

Originally Posted by marting

Doug! Any idea on what boost the non-adjustable wastegate on my turbo is set at? I'm guessing 8 psi ? whatyathink?

For example .. my CT26 non adjustable wastegate, it's set to 10 PSI .. after that it start the opening and you will see the overboost light in the das ..

But it's pretty easy solve it if you want more boost ( BTW disconected wastegate, means more than 20 PSI of boost ) with a boost controller ..



Halmans Manual Boost Controler .. ( don't waste money in those turbonetics boost controllers )

[marting]

Hmm.. I see... So if one uses a boost-controller, one can "move" the opening-preassure on the wastegate upwards? I mean can i keep the wastegate as it is and then use a B.-C. to give me more or less boost?

Curious about some plumbing..

There is a nipple on the compressor-housing and on the wastegate (dont know the name.. the part that holds the spring)
These two should just be connected with a hose right?
And if i use a boost-c. it sits between those?

And as i mentioned, what about the hose from the "throttle-body" to the IP What does it do? Is it vacuum from the intake that regulates the fuel-flow?
Can i move it from the intake to somewhere before the turbo on the air-intake.. I'm guessing it will be about the same?

I also wonder what are the best places to take/return water to ensure a good flow that doesnt stop or change direction under any condition..

The oil will go from t-piece behind the oil-pressure swicth

Also the turbo is pretty heavy. Have you guys used any supporting brackets to hold it, or does it only hang from the manifold?

The pop-off
(wich I guess is overkill for my application, but it sounds cool)
It goes on the intake-tube right before the intake right? where does the hose, that there is a nipple for on top of it, go?

One more thing.. I keep calling them "hoses" is that correct? or would "line" or "pipe" be more correct.. I'm thinking a pipe is something made from a hard material... like a plumber would use
and a hose is soft made from rubber etc..Maybe tube is a better word? Are hoses for gardeners and firefighters?
I think I have a pretty good english vocabulary for a Nordmann..But there are some "holes" in the technical departement

You guys (especially you Dougal) have been very helpfull....
I think I'll have to ship some delicious Norwegian beer to all corners of the earth when this is "over"...as a token of my apreciation.

[Dougal]

Originally Posted by marting

You guys (especially you Dougal) have been very helpfull....
I think I'll have to ship some delicious Norwegian beer to all corners of the earth when this is "over"...as a token of my apreciation.

Happy to help, but I thought the Norwegian climate would be more suited to spirits.

For boost control I prefer to cut the wastegate rod and weld in a threaded section (be careful not to overheat and burn the seals). This lets me change the boost from almost zero to the maximum the turbo can produce (wastegate always closed) with just a 10mm spanner.
It has the advantage that it holds the wastegate closed tighter than a boost controller so it doesn't open by itself.

This is what my T25 looked like two years ago. You'll notice the plugs in the side, I don't use the water cooling.

[Tapage]

The Manual BC are a great option for us with a non adjustable internal wastegate and also don't want to cut and weld anything in our setup .. actually it function and are pretty accurate the setup .. you can set it to 14.5 PSI if you want .. at least mine.

The MBC go between the turbo compresor housing and the wastegate itself .. in my case halmans MBC block the pressure that normaly goes throught the hose from the compresor to the wastegate to activate it ( means start bleeding exhaust pressure in the turbine side to control your capabilities to build boost ) ..

Blocking this " signal " your wastegate keep closet alowing you ( your engine ) build more boost until the wastegate start open due to your settings ..

The MBC allow you to " lie " to your wastegate building more boost ( even with the risk to go over your surge line or sure out of your eficiente island in the compresor map ) but it don't affect the process to build boost sooner or later ..

[marting]

"And as i mentioned, what about the hose from the "throttle-body" to the IP What does it do? Is it vacuum from the intake that regulates the fuel-flow?
Can i move it from the intake to somewhere before the turbo on the air-intake.. I'm guessing it will be about the same?"

Any ideas here?

[Tapage]

Originally Posted by marting

"And as i mentioned, what about the hose from the "throttle-body" to the IP What does it do? Is it vacuum from the intake that regulates the fuel-flow?
Can i move it from the intake to somewhere before the turbo on the air-intake.. I'm guessing it will be about the same?"

Any ideas here?

If you run a turbo IP then you have ( in the case of 1HD-T IP ) at the top of the IP a boost compensator. The hose that you mention from the trotle body ( in the 1HD-T in the cross over pipe ) brings the " boost " signal from the intake to the boost compensator, that add more fuel ass is needed by the engine ..

More boost = more fuel ..

You can mode this hose but always need to be after the turbo .. means where you have positive pressure.