Turbo for 2H

[Tapage]

Originally Posted by marting

What is IP ?

Injection Pump

Originally Posted by marting

What do i have to do with the fuel system? just adjust it? Or add parts?

Ajust if to compensate more air in the system due to the turbo .. means adding more fuel.

Originally Posted by marting

Water: from the drainplug on the block to the hose going out from the termostat.

Really the water never worry me to much ..

Originally Posted by marting

Turbo: To small better than to big?
The easiest to get here i think would be something from a 2-2,5 liter petrol-engine. From Saab or Volvo maybe..What else is there to concider. any small pipes, vacuum, fuel-regulation and so on????

Are not that simple .. but yes, 2 - 2.5 petrol engine will be the route, but it all depends on the turbo .. smaller turbine, means more backpressure and maybe EGT issue in your engine .. much boost sooner but what to do in the HI range ?

Bigger turbine, means you are dealing with the boost to late in your powerband ..

[marting]

Dougal! and you other guys with know-how;

A local guru said i should get a t 25 with a 60 A/R aprx. (i still don't comletely understand what that is)
And that i would be better of with a slightly biggish turbo than a small one. He said that i could limit it's power on top with the fuel adjustment and the wastegate , and a garrett gt would spool up early enough anyway.

Does anyone agree? I will buy a turbo next week...and if i can find a garrett t25 with A/R between 50 and 60 i guess i'll go for it..

[Tapage]

Originally Posted by marting

He said that i could limit it's power on top with the fuel adjustment and the wastegate , and a garrett gt would spool up early enough anyway..

I'm not Dougal but .. this statement it's complete correct.

The point is, with a bigger compresor, making a bunch of boost .. you can blow your head. or simple waste your money in a huge one that you really don't gonna use complete .. or at least not the 100% of it capabilities.

With a smaller ( more than apropiate ) turbine side, you found your engine with uncontrolable EGT due to the restriction and backpressure in the eshaust manifold .. making much boost sooner and heat probles at higer rpm ... viceversa with a bigger turbine side.

[Dougal]

Originally Posted by marting

Dougal! and you other guys with know-how;

A local guru said i should get a t 25 with a 60 A/R aprx. (i still don't comletely understand what that is)
And that i would be better of with a slightly biggish turbo than a small one. He said that i could limit it's power on top with the fuel adjustment and the wastegate , and a garrett gt would spool up early enough anyway.

Does anyone agree? I will buy a turbo next week...and if i can find a garrett t25 with A/R between 50 and 60 i guess i'll go for it..

The only A/R choices I'm aware of with the T25 are the 0.49 which I have and the 0.64.
The 0.49 gives you more low end and a wider usable rpm range. the 0.64 will give you more top end power as it's best efficiency point occurs at higher engine rpm.

I am hesitant to recommend a 0.49 A/R T25 for a 2H unless the driver has all the instruments and drives to them. There's a small chance that an ignorant driver could overspeed the turbo, causing it to die prematurely.

Regarding the GT series, being a later generation product they're more refined and may spool earlier than the older turbos of the same size, but the biggest difference is the bearings used in some models.
Garrett use the suffix "R" to show which ones have bearings in them, these will spool up sooner, the ones without have journal bearings.

So in short
GT2560 = journal bearings
GT2560R = roller/ball bearings and faster spool up.

[rchalmers3]

Just to reinforce the choice selection: When you recommend a turbo, you are talking about the exhaust turbine A/R, correct?

I keep thinking that if the measurement of the compressor is mistakenly referenced (or assumed), some damaging or disappointing results could happen.

Rick

[Dougal]

Originally Posted by rchalmers3

Just to reinforce the choice selection: When you recommend a turbo, you are talking about the exhaust turbine A/R, correct?

I keep thinking that if the measurement of the compressor is mistakenly referenced (or assumed), some damaging or disappointing results could happen.

Rick

Yes, the exhaust A/R.
Often the same turbo is availble with a few different A/R exhaust housings that can be swapped at will, but the compressor housing doesn't change.

[Tapage]

Originally Posted by rchalmers3

Just to reinforce the choice selection: When you recommend a turbo, you are talking about the exhaust turbine A/R, correct?

It's a mix IMOP ..

You can run a good turbine side, proper fitted and sized for your aplication ( engine ) and a huge compresor that it's way to much for your target .. it means the turbine side can do it properly but the compresor side maybe gotta make boost later than you want and way to much ..

At the end you could find yourself wastegateing ( if this word exist ) the 50% of the real valuable potential of the compresor side due your engine can handle that pressure ..

of coz .. the worst scenario ..

[marting]

Ok.. I'm waiting for an offer on a new turbo now.. I'll keep you updated.

[marting]

Another thing i thought of; Is it ok to use exaust-hose for part of the exhaust system? It would be easy to make a pipe behind the turbo with the cone-shape mentioned earlier by tapage. And in then use the heavy-duty hose from it, to right in front of the clutch-housing (where it's clamped to a bracket..)
That way i can get a vibration-free system further back and less heat will transfer to the engine-compartement?

Would save me a lot of bending and welding..

I'm talking about hose bespoke for exhaust.. not silicone or anything like that.

[Dougal]

Originally Posted by Tapage

It's a mix IMOP ..

You can run a good turbine side, proper fitted and sized for your aplication ( engine ) and a huge compresor that it's way to much for your target .. it means the turbine side can do it properly but the compresor side maybe gotta make boost later than you want and way to much ..

At the end you could find yourself wastegateing ( if this word exist ) the 50% of the real valuable potential of the compresor side due your engine can handle that pressure ..

of coz .. the worst scenario ..

That's only possible if someone has built a turbo from mis-matched pieces.
If you buy a standard turbo, the compressor is matched to the turbine, if they give you two turbine housing options then each of them will work well with that compressor.

[Tapage]

Originally Posted by Dougal

That's only possible if someone has built a turbo from mis-matched pieces.
If you buy a standard turbo, the compressor is matched to the turbine, if they give you two turbine housing options then each of them will work well with that compressor.

I thought it all depends ..

I've seen plenty of selection on the Turbonetics side, with diferent AR numbers for turbine and compresor side, that go radical from .36 to .68 or more in the compresor side for the same turbo ..

it all depends on your aplication .. thought.

[rchalmers3]

Originally Posted by Dougal

The only A/R choices I'm aware of with the T25 are the 0.49 which I have and the 0.64.

Dougal, do you have maps of these I could play with?

Rick

[Dougal]

Originally Posted by rchalmers3

Dougal, do you have maps of these I could play with?

Rick

Yes, it's the same compressor I mapped out for the 3B. There's a link in the reference at the top of the page.

[Dougal]

Originally Posted by Tapage

I thought it all depends ..

I've seen plenty of selection on the Turbonetics side, with diferent AR numbers for turbine and compresor side, that go radical from .36 to .68 or more in the compresor side for the same turbo ..

it all depends on your aplication .. thought.

Okay, I wasn't thinking of all the outfits that make wild hybrid turbos with very different parts. I was thinking of turbo makers like Garrett, KKK, IHI etc.

[marting]

Have anyone heard of a turbo called GT2635v ?
I can get a slightly used one for 3500kr (700usd) Maybe cheaper if i haggle
It's out of a Volvo XC70. Petrol 2,5l 200hp (with lots of down-low tourque)
I'm not sure if it has a mechanical wastegate or some electronic gadget, I guess electronical would be hard to use right?
I thought volvo used Mitsubishi turboes? Have they converted to garret?

What do you think, sometning i could use?

[Dougal]

Originally Posted by marting

Have anyone heard of a turbo called GT2635v ?
I can get a slightly used one for 3500kr (700usd) Maybe cheaper if i haggle
It's out of a Volvo XC70. Petrol 2,5l 200hp (with lots of down-low tourque)
I'm not sure if it has a mechanical wastegate or some electronic gadget, I guess electronical would be hard to use right?
I thought volvo used Mitsubishi turboes? Have they converted to garret?

What do you think, sometning i could use?

Can you check that turbo code? They normally jump from GT25 to GT28 series, I haven't heard of a GT26 before but they could exist.
The last two digits are the compressor wheel diameter. 35mm is too small for a turbo of GT25 or bigger size.

Unfortunately turbomaster don't currently have a listing for a volvo XC70.
TurboMaster - Passenger Cars

[marting]

Yeah Dougal... I'll give them a ring tomorrow and get the numbers again.. It's possible that I don't remember the right numbers.. Only part I'm sure about is 26

I'll be back

[rchalmers3]

marting,

It is time to quit fooling around. I want to see pictures of your intercooler or else some hot oslo chicks... or both.

Edit: Only pictures of the intercooler. I don't want you to get in trouble

Rick

[marting]

Ok Dougal.. I checked.. The turbo is called GT2652. I can't find it in Garrett's catalog

It also turns out it's from the D5 163hp diesel-unit. So i guess that makes it to small..

Rick! Ok dude!

By the way.. That is my girlfriend, so no sleezy remarks!

[rchalmers3]

That looks very nice.... it looks very clean but a little tight. How big are the openings and how much did you pay for it? the intercooler

Rick

[rchalmers3]

I guess in Norway you don't need air conditioning. The condenser for the A/C mounts in the holes where you have fastened your frame for the intercooler. I am looking for a solution to cool the air charge without cutting the body, so my options are limited by this.

Rick

[marting]

Originally Posted by rchalmers3

That looks very nice.... it looks very clean but a little tight. How big are the openings and how much did you pay for it? the intercooler

Rick

The openings are about 55 mm . I payed 2000 Nkr (400USD) and i got lots of aluminium pipes, silicone bends and expensive hose clamps.
I'm pretty sure it's more than big enough. ( a bigger one would fit poorly) I will cut holes in the frontplate right below where the small oval hole is now..

Aircondition? Nah... it would be nice to have for maybe 10 days of the year.
The holes i mounted in are actually used for a roll-down curtain!
To keep cold air off the radiator in the winter
Only the last few years have a/c been "standard" on cars sold up here. In 1983 only the biggest Mescedes' would have that.

Normal temperature in the summer is 15-25 c and maybe up to 30 on a few warm days.. I think the warmest ever recorded in Norway is 36c
In the winter it will sit between 0 and -15 here in Oslo Further north and at higher ground it can drop to -20 Coldest ever is around -50c

[rchalmers3]

marting, I am looking forward to seeing how you will fit the turbo to your manifold. Do you have welding tools or will you hire someone for the job?

Rick

[marting]

I have some welding equipment. As for the manifold to turbo adapter, the plan is to cut and drill it myself, or use my friend who runs a machine-shop, tack it together and get help TIGing it together. I only have a MOG-welder (no gas,flux in thread) and it's fine for sheet-metal and brackets and stuff (like the IC mount) But for stuff that has to be air/water-tight it's not good enough.

I'm looking forward to see how it turns out too!

[marting]

Had to post one more! It's my 100th post!

[Dougal]

Originally Posted by marting

Ok Dougal.. I checked.. The turbo is called GT2652. I can't find it in Garrett's catalog

It also turns out it's from the D5 163hp diesel-unit. So i guess that makes it to small..

Rick! Ok dude!

By the way.. That is my girlfriend, so no sleezy remarks!

Nice photos.
Turbomaster show a GT2052V on the 162hp 5 cyl diesel. That'd be ideal for a 3B, but yeah smaller than I'd recommend for a 2H.
It's also variable vane, controlling it may be a challenge unless you could retrofit a pressure actuator.

[marting]

Yeah... I'm not gonna go for that one.. It's slightly expensive for a used part too...
I'm going away for the weekend so the hunt continious on monday.

Thanx for the input guys, have a nice weekend