The 2H/12H-T/1HZ/1HD-T/1HD-FT Gturbo Alternative Tech Thread

[Dougal]

Any more info on this engine. I've never come across one.

Europe got them towards the end of the 100 series. GT2359V variable vane turbo and commonrail to keep them running clean. Neiboo (from Germany) posted some photos a few months back: VNT turbo problem - solved... More or less

I'm not sure if his one is CR or not. But he's definitely VNT.

 

[gerg]

Serenity, the supra compressor will flow better yes, but turbo response is mainly determined by turbine and exhaust housings. No matter what compressor you put on it, it's still a ct26 I'm afraid.

 

[Dougal]

Kinugawa want $US899 for their 1HD-FTE CT20B: Kinugawa Turbocharger TOYOTA 1HD-FTE 4.2L Land Cruiser 17201-17040

But no idea how good the turbine wheel is. I've seen good ones with nice shape and bad ones with paddle wheel shaped turbines.

 

[serenity]

Serenity, the supra compressor will flow better yes, but turbo response is mainly determined by turbine and exhaust housings. No matter what compressor you put on it, it's still a ct26 I'm afraid.

I understand this, differences in the compressor will have some effect though such as a heavier wheel vs a lighter one. I guess I'm mainly interested in what kind of effect each type of comp wheel will have on the performance of the turbo whether it's beneficial or detrimental. I may just buy the 11 blade and see what it's like since I'm just experimenting anyway, if I don't like it I can always go back to the factory style billet 6/6.

If I understand my research correctly, the 11 blade will flow better in a low rpm application but won't have as much top end. Being billet it will also be lighter than a cast wheel.

 

[Dougal]

Billet wheels are often machined with a thinner hub than cast wheels. This is where they get the flow advantage from. But it also weakens the wheel compared to a heavier hub.

I'd be much happier with a heavy duty machined wheel with extended tips. But turbo parts makers don't consider me the target market.

 

[mudgudgeon]

differences in the compressor will have some effect though such as a heavier wheel vs a lighter one. I guess I'm mainly interested in what kind of effect each type of comp wheel will have on the performance of the turbo whether it's beneficial or detrimental.

I might be wrong, but if you're comparing oem components, my thinking is a ct26 with 1hd-t turbine housing, supra compressor hybrid will spool up a little faster than a stock 1hd-t unit. Same turbine, same housing, same drive pressure, turning a larger compressor. It will take a little more drive pressure to overcome the inertia of the slightly larger compressor, but on thd other hand, as soon as it's moving air, it will move more with every rotation .

Also, a 1hz has higher compression and more torque than a 1hd-t at low rpm, so it will probably spool up quicker on a 1hz.

A 1hd-t / supra hybrid is not to be sneezed at. They are capable of getting nearly 3 tonne of landcruiser moving surprisingly quick. It's just that now there's better options.

 

[gerg]

I guess for the amount of effort it takes to swap all that and still be stuck with the stock turbine is a rip off to me. Tuff turbo to access.

 

[serenity]

I guess for the amount of effort it takes to swap all that and still be stuck with the stock turbine is a rip off to me. Tuff turbo to access.

I muck around with cruisers (throw money into a bottomless pit) because I find it enjoyable. My current little project is to see what kind of improvement I can make inside an OEM frame, I am under no illusions that it will be anywhere near a gturbo.
Once I'm done with this project and tidying up the rest of my 80 I'll go back to sinking a ridiculous amount of money into my fj55.

 

[Dougal]

I might be wrong, but if you're comparing oem components, my thinking is a ct26 with 1hd-t turbine housing, supra compressor hybrid will spool up a little faster than a stock 1hd-t unit. Same turbine, same housing, same drive pressure, turning a larger compressor. It will take a little more drive pressure to overcome the inertia of the slightly larger compressor, but on thd other hand, as soon as it's moving air, it will move more with every rotation .

Also, a 1hz has higher compression and more torque than a 1hd-t at low rpm, so it will probably spool up quicker on a 1hz.

A 1hd-t / supra hybrid is not to be sneezed at. They are capable of getting nearly 3 tonne of landcruiser moving surprisingly quick. It's just that now there's better options.

But why bother when a 1HD-FTE turbo has a supra sized compressor and far faster spooling turbine?

 

[mudgudgeon]

But why bother when a 1HD-FTE turbo has a supra sized compressor and far faster spooling turbine?

Sure, if I had one sitting I'm the shed, why not.

My comment is based on my experience building a hybrid, which is what ill likely do again short of finding a near ideal mamba, sumalaya option

 

[Dougal]

Can anyone tell me if a TD05 and TD06 turbine shaft have the same length? I know they take the same rebuild kits so diameters are the same.

 

[ForealBoreal]

Yup they should be the same from what I have read and compared

 

[ForealBoreal]

You gotta love the community.

turns out an 18g with the 7cm housing is the ticket for what I was after.
Mamba can build one to the specs I want but I am going to try and pressure sumalaya to do a run.

 

[Dougal]

Yup they should be the same from what I have read and compared

In that case, they already make 11 blade gen 3 turbines for TD06H. They'd just need to machine the blades down and rebalance to make a TD05H version.

 

[Dougal]

Yup they should be the same from what I have read and compared

In that case, they already make 11 blade gen 3 turbines for TD06H. They'd just need to machine the blades down and rebalance to make a TD05H version.

 

[ForealBoreal]

After talking to a few sources I'm still convinced the 18G fits my needs.
It works well in the 7cm housing apparently

Its funny as the grunter x uses the same housing, turbine housing but a modified 16G Large wheel.
No wonder it spools up quick. (65mm exducer vs 68 exducer) Also no machining of the CHRA required.

 

[Dougal]

After talking to a few sources I'm still convinced the 18G fits my needs.
It works well in the 7cm housing apparently

Its funny as the grunter x uses the same housing, turbine housing but a modified 16G Large wheel.
No wonder it spools up quick. (65mm exducer vs 68 exducer) Also no machining of the CHRA required.

How much boost are you planning to run? It seems like overkill unless you're going for huge boost. It has ~46 lb/min max flow.

23psi, big intercooler, 3200rpm, ~170kw and you're still only pulling ~33 lb/min. You're still to the left of the sweet spot on that compressor.
Same but at 2200rpm and you're only pushing 25lb/min. That's right on the surge line.

IMO it's too big for anyone running less than 30psi at 4000rpm. Even 30psi at 3200rpm is okay for the 16G6 compressor.

 

[gerg]

I agree Doug. The 16g compressor is really more than capable for most guys unless you want the rpms. Like the rpms most of us would almost never run without cringing.

 

[tweeek]

After talking to a few sources I'm still convinced the 18G fits my needs.
It works well in the 7cm housing apparently

Its funny as the grunter x uses the same housing, turbine housing but a modified 16G Large wheel.
No wonder it spools up quick. (65mm exducer vs 68 exducer) Also no machining of the CHRA required.

Can you elaborate on this setup then? Which CHRA housing and turbine wheel are you refering to in this setup? Are you still after a Toyota CHRA bolt in?

 

[ForealBoreal]

The problem I run into with the 16g is the back pressure with the turbine. I don't want to be running 12-15lbs of boost on cruise.