Anyone running a HX30 on a 1HZ or similar sized diesel? (1 Viewer)

[Formulaonehd]

Hi all,

My mech has recommended i run a HX30 Holset on my 1HZ in the 105 series. He did an epic job of putting a DTS system on my car a year ago:
TD05 + Top mount intercooler and bonnet scoop, running at 10psi (stock pump)

Its a great setup, but max HP doesnt come on until over 2500rpm or something, and low down boost isnt the best so there are definitely better options i know that.

He reckons they go really well in the 1HZ and i trust his opinion for sure but just wondering if anyone is running one and their opinions?

Cheers

 

[mudgudgeon]

Ask your mechanic more questions.

Anyone that has previously recommended a DTS system at 10psi, and not achieving full boost until 2500rpm is not doing the right thing by that engine IMHO

Boost is your friend, particularly for a hzj105.

You want something that is going to boost early without needing lots of fuel to drive it so you can keep the heat down
Combustion heat will kill that engine before boost will

If he's recommending a hx30, ask what boost numbers can you expect to see, and at what RPM

 

[Formulaonehd]

Ask your mechanic more questions.

Anyone that has previously recommended a DTS system at 10psi, and not achieving full boost until 2500rpm is not doing the right thing by that engine IMHO

Boost is your friend, particularly for a hzj105.

You want something that is going to boost early without needing lots of fuel to drive it so you can keep the heat down
Combustion heat will kill that engine before boost will

If he's recommending a hx30, ask what boost numbers can you expect to see, and at what RPM

I agree, but dont get me wrong it is a very consistent performer and i would say if hwy driving is your main goal then this is a good setup to run. I want more low down though and there doesnt seem to be much info on cruisers using the holsets

 

[mjosoba]

I think @Dougal was saying the Super 30 would be a good match, but I could have that wrong. The 44mm HX30 is good one the 3.9 size diesels, they may lose efficiency up high in the RPM’s. I think the 1hz flows more air than those, so maybe the Super would meet your needs better. Maybe research the HE211 too.

 

[Formulaonehd]

I think @Dougal was saying the Super 30 would be a good match, but I could have that wrong. The 44mm HX30 is good one the 3.9 size diesels, they may lose efficiency up high in the RPM’s. I think the 1hz flows more air than those, so maybe the Super would meet your needs better. Maybe research the HE211 too.

WIll do, found some info on he TD42 patrols using the HX30s, turns them into weapons, big HP too. I think this is where my mech is coming from although he says he has alreay set a few up with the dirty 30 and they "perform better than the CT26 and others - transforms the car"

 

[AirheadNut]

I had an HX30 on the 3.0 OM617 in my G-wagen. If I remember correctly it hit max boost (wastegate set at 18psi) a little before 2500 rpm and held to 4000+. When boost hit the 5200lb rig would really scoot.

Obviously the 1HZ will flow more air than the OM617, so I would expect boost to build earlier. The Mercedes is also much higher revving, and would happily sit at 3800rpm on the highway.

 

[mudgudgeon]

Have you got specs/dinensions for the turbine and compressor?

 

[Formulaonehd]

Have you got specs/dinensions for the turbine and compressor?

Holset HX30 Specs
For Engine Capacity (liters) Up to 5
Output Range 90-240
Airflow (kg/s) 0.35
DIMENSIONS:
Length (mm) 222
Width (mm) 217
Height (mm) 154
Smallest Mass (kg) 8
Largest Mass (kg) 10
OPTIONS:
Wastegate Yes
Watercooled B/H or T/H Yes

 

[mudgudgeon]

Holset HX30 Specs
For Engine Capacity (liters) Up to 5
Output Range 90-240
Airflow (kg/s) 0.35
DIMENSIONS:
Length (mm) 222
Width (mm) 217
Height (mm) 154
Smallest Mass (kg) 8
Largest Mass (kg) 10
OPTIONS:
Wastegate Yes
Watercooled B/H or T/H Yes

Was wondering how the compressor and turbine wheels compare in size to other options

 

[Dougal]

I think @Dougal was saying the Super 30 would be a good match, but I could have that wrong. The 44mm HX30 is good one the 3.9 size diesels, they may lose efficiency up high in the RPM’s. I think the 1hz flows more air than those, so maybe the Super would meet your needs better. Maybe research the HE211 too.

WIll do, found some info on he TD42 patrols using the HX30s, turns them into weapons, big HP too. I think this is where my mech is coming from although he says he has alreay set a few up with the dirty 30 and they "perform better than the CT26 and others - transforms the car"

Yep the HX30 Super (46mm compressor intake) has been run on TD42's with great results. It can provide more boost than a 1HZ can safely handle.

They also have versions with 44mm intake and 40mm intake. 46mm has a far bigger wheel and incredible surge resistance and boost capacity. The 44mm is still very good. The 40mm isn't the one you want.

 

[Formulaonehd]

Good to know, i would assume the best for the HZ is the 44mm? Im not looking at anything over 15psi so boost wont be an issue bu then again i keep hearing its not boost that kills the HZ, its the heat from the bad fuel tuning when not done correctly

 

[Dougal]

Good to know, i would assume the best for the HZ is the 44mm? Im not looking at anything over 15psi so boost wont be an issue bu then again i keep hearing its not boost that kills the HZ, its the heat from the bad fuel tuning when not done correctly

Depends where you are and how many rpm you use. I'd go straight for the 46mm if you can fit it in (it's a physically larger turbo).

 

[mjosoba]

@Formulaonehd this thread has some pics of my uncles Super 30 on a picnic table. 2x6” planks. It may give you an idea of its size with a good reference point.

Super 30 has arrived!!

 

[mudgudgeon]

i keep hearing its not boost that kills the HZ, its the heat from the bad fuel tuning when not done correctly

Yes and no.

There needs to be a balance.

Combustion heat in the head and precombustion chamber is enemy number , then heat in piston crowns, then boost

You want a turbo capable of delivering high flow early in the rev range, without dumping in a s***load of fuel to get it to spool up.
High airflow, and boost keeps air fuel ratios high, and keeps EGTs low. This is where boost is your friend (but not if the turbo is working hard or is overfueled to do it)

Consensus on all the different forums is that adding any turbo to a 105 series HZ is a high risk deal. They have lighter pistons than 70/80series HZ.

My personal limit would be 15psi, and 18 psi max on a 105 series HZ due to pistons.

 

[Tapage]

no matter how much boost you run .. you will need to keep a constant eye on the water temp ..