DIrty 30 (Holset HX30) goes on the 1HZ - Smiles all round (1 Viewer)

[Formulaonehd]

I know there was a discussion a while back about what turbos to put on the toyota diesel donks and after the somewhat lack-lustre experience of running the Mitsubishi TD05 18g version on my 1HZ (10mm pump @ 10 psi) i took my mechanics advice and went down the dirty 30 route. The TD05 spooled up very late and whilst its a great and powerful turbo, its too big for the toyota diesels and that means wasted or unavailable power

A few days later and dyno tune done, i went to pick it up and my god has it transformed the car. The Holset HX30 should have come stock on these engines! im still running the original 10mm pump (not compensated although thats to come) a modest 14 psi and the car drives like a weapon! not putting out mind blowing HP and torque but the useable power means the car is working optimally and extremely efficiently. It feels like i have doubled in power figures and im not exaggerating it pulls like a freight train, something the HZs are not renowned for. EGTs are not high and well below safe thresholds.

As many in the US would know the HX30 is on some of the cummins engines and is a proven reliable workhorse with a very fast spool up. Couple that with its low drive pressure it makes for the ultimate turbo on diesel applications that require a quick low down response due to weight and compression. The engine breathes better, and the turbo works like the ultimate companion i couldnt be happier. Holset you guys rock!

Anyone thinking about turboing their diesel donks or upgrading i highly recommend the HX30 into your choice range.

 

[GTSSportCoupe]

Great feedback. That turbo should work for the 1HDT guys too then?

 

[Formulaonehd]

Great feedback. That turbo should work for the 1HDT guys too then?

Yeh definitely, as you know the HZ and HDT are very similar. I like to think of the HDT having a stronger head and the HZ having a stronger bottom. The results should be similar even with the HD's direct injection vs the HZ indirect injection

 

[mjosoba]

Did you do the 40,44, or 46mm (Super)?

 

[Dougal]

The TD05 18G is too big for most and can't do low rpm boost without surge. You didn't mention which turbine housing you had, but that also makes a huge difference.
A TD05H-16G6 with 7cm turbine would have been far better and pretty similar overall result to an HX30.

The HX30's are designed for diesels. Which means they have a smaller turbine in comparison to aftermarket turbos that are sold everywhere. They are also designed for efficient high boost.

 

[Indestructible 47]

Yeh definitely, as you know the HZ and HDT are very similar. I like to think of the HDT having a stronger head and the HZ having a stronger bottom. The results should be similar even with the HD's direct injection vs the HZ indirect injection

HD and HZ blocks are basically a split image. A 1HZ is no stronger than a HD. Thats why aussie guys put hd heads on a 1hz.

 

[Formulaonehd]

Im not running the super just the standard 30 which im pretty sure is 6cm

Agree the TD05 was too big hence the variations that now get rebuilt with smaller housing.

 

[dare]

Great work mate, I've been wanting to put a HX30 on a 2H or 1HZ for years.

The HX30's are designed for diesels. Which means they have a smaller turbine in comparison to aftermarket turbos that are sold everywhere.

I disagree. The HX30 turbine is quite a bit larger than TD05H in both exducer and inducer. 52/65.5 vs 49.2/56. If anything you'd say the HX30 has an unusually large turbine for the compressor flow.

Some examples of the turbine sizes on other turbos with similar or greater compressor flow that we often use or after market turbos are built around.

GT2860/GT2871 47/54
CT26 52/60
CT12b (1hdfte) 48/60

 

[Dougal]

I disagree. The HX30 turbine is quite a bit larger than TD05H in both exducer and inducer. 52/65.5 vs 49.2/56. If anything you'd say the HX30 has an unusually large turbine for the compressor flow.

Some examples of the turbine sizes on other turbos with similar or greater compressor flow that we often use or after market turbos are built around.

GT2860/GT2871 47/54
CT26 52/60
CT12b (1hdfte) 48/60

Turbine wheel diameter isn't turbine size. You have to consider the wheel and housing.

A 6cm HX30 has a choke flow of about 14 lb/min.
A TD05H even with a 7cm housing is 10% bigger flow wise.
The GT28's even with a 0.64 housing are bigger flow wise.

 

[wedgetail]

HD and HZ blocks are basically a split image. A 1HZ is no stronger than a HD. Thats why aussie guys put hd heads on a 1hz.

Yep - all 1h* run the same crank, mains, block (save for a blank or two), oil pump, water pump etc. for a given year range

 

[GLTHFJ60]

Im not running the super just the standard 30 which im pretty sure is 6cm

Agree the TD05 was too big hence the variations that now get rebuilt with smaller housing.

6cm2 describes the turbine housing size. There were at least 4 different HX30 variants, and are distinguished by compressor inducer size. Which one you have is important for others. Do you have any pictures of it?

 

[Formulaonehd]

This is the only pic ive got but can try get one in the engine bay later. The old TD05 to the right obviously

 

[Dougal]

This is the only pic ive got but can try get one in the engine bay later. The old TD05 to the right obviously

View attachment 2026557

Looks like the 44mm version. Stock turbo from the 130hp Cummins 4BT.

The 46mm version is from a Deutz engine.

 

[GLTHFJ60]

^^ Agreed.

 

[Shrek80]

Wondering how the holset has gone long term? Looking at one now for my HZ and figuring parts list out. Are the oil fittings unique to each turbo? I have an early DTS TD05 on mine. The price is compelling, about the same as a mamba TD05 from SINS4X4, the super being a little more.

 

[Formulaonehd]

Wondering how the holset has gone long term? Looking at one now for my HZ and figuring parts list out. Are the oil fittings unique to each turbo? I have an early DTS TD05 on mine. The price is compelling, about the same as a mamba TD05 from SINS4X4, the super being a little more.

I no longer have the car got a 200 series, it was bought by a mate locally so i still see it around town and going strong. One thing that needed to be done which im not sure if he has done it is to install the boost compensator on the 10mm pump (not compensated at all) it should help the diesel labouring at low rpm as a result of the 4 speed auto and fuel being wound up for the turbo. This wouldnt affect those with boost or altitude compensated pumps i wouldnt think

If i was to do this all over again i would still go the holset, it is better suited to the HZ than some of the other great turbos out there like the green and red wheel grunters etc. Not to say they wouldnt work well but the HX30 just works i couldnt see anything working better than what i experienced after driving stock FTEs and literally raising an eye brow "My HZT goes better than a stock FTE" and only running a few extra PSI, no other mods

 

[Shrek80]

Good to hear as i just ordered one! I bought a used pump a few months ago with a compensator and stuck it on my pump. The old TD05 just spools up too slow and doesnt make a lot of boost anywhere down low. In the mud in low range revving hard, it screams and is unbeatable. But thats rarely done.
I should have it here mid week and will have to dry fit it to see what other mods im gonna need to make. I should add an intercooler i know, and want to, just need to keep the minister of finance happy. Fingers xd its gives me the little bit more i need!

 

[Formulaonehd]

Good to hear as i just ordered one! I bought a used pump a few months ago with a compensator and stuck it on my pump. The old TD05 just spools up too slow and doesnt make a lot of boost anywhere down low. In the mud in low range revving hard, it screams and is unbeatable. But thats rarely done.
I should have it here mid week and will have to dry fit it to see what other mods im gonna need to make. I should add an intercooler i know, and want to, just need to keep the minister of finance happy. Fingers xd its gives me the little bit more i need!

Smart move, depending where you live and how much mudding you do i would suggest putting a front mount cooler on. I ran a top mount from the DTS system and it was fine for me but i only did minimal mud and i lived in hot climate and if i kept it and increased the 4WD use i would want to upgrade the cooler to keep the EGTs down. If you live in cold climate a top mount would probs suffice

 

[Dirty Koala]

Reviving an old thread.

I am getting ready to swap a 15BFT 4.1L Toyota diesel into my BJ42. I am likely going to swap out the tiny stock turbo for something that flows better. An HX30 is one that comes to mind. Anyone have experience with the 15BFT?