15BF Best Turbo to use? (1 Viewer)

[frankenyota]

Have a 15BF engine that will get a turbo added and after talking to some people with experience turboing a 15B and it was recommended that a TD05 18G with a 6cm housing is a good choice. Not a lot of information around with adding aftermarket turbos to the 15B. Was looking at a Holset HE221 / HX30 but been told they are too small for the big 4 cylinder, 4 litre. Currently looking at a Arashi TD05 18G with journal bearing, oil and water cooled, these have some good reviews and seem cheap compared to some other options.
Trying to work out what is the best combination for the compressor and turbine wheels. Want a combination for the torque and lower revs of the 15B engine.
Been told this turbo should spool nice and early as the big 4 cylinder can turn quite a bigger turbo than the factory one fitted to the 15BFT.
This is what l'm looking at.

Arashi Dynamics Turbo Journal Bearing TD42 Patrol TD05H-18G-6cm 3 Bolt Low Mount

Arashi Billet Turbo TD05H-18G-6cm2 3 Bolt TD42 Patrol Low Mount Brand New and Complete CHRAs balanced by VSR Core-Balancing Machine from Turbo Technics. Application - Nissan TD42 Patrol with low mount exhaust manifold- Compressor housing inlet pipe needs to be modified to fit this 3.15” Cover...

arashidynamics.com

 

[mudgudgeon]

They show it with wastegate actuator, and wastegate welded shut?

 

[frankenyota]

Yes l did notice that, maybe just full boost all the time
I'm assuming it relieves inside the exhaust housing.
I’ll ask them the question
Think l will go with a different style of exhaust housing to avoid the welded waste gate. Probably put the wrong link in above

 

[Dougal]

Have a 15BF engine that will get a turbo added and after talking to some people with experience turboing a 15B and it was recommended that a TD05 18G with a 6cm housing is a good choice. Not a lot of information around with adding aftermarket turbos to the 15B. Was looking at a Holset HE221 / HX30 but been told they are too small for the big 4 cylinder, 4 litre. Currently looking at a Arashi TD05 18G with journal bearing, oil and water cooled, these have some good reviews and seem cheap compared to some other options.
Trying to work out what is the best combination for the compressor and turbine wheels. Want a combination for the torque and lower revs of the 15B engine.
Been told this turbo should spool nice and early as the big 4 cylinder can turn quite a bigger turbo than the factory one fitted to the 15BFT.
This is what l'm looking at.

Arashi Dynamics Turbo Journal Bearing TD42 Patrol TD05H-18G-6cm 3 Bolt Low Mount

Arashi Billet Turbo TD05H-18G-6cm2 3 Bolt TD42 Patrol Low Mount Brand New and Complete CHRAs balanced by VSR Core-Balancing Machine from Turbo Technics. Application - Nissan TD42 Patrol with low mount exhaust manifold- Compressor housing inlet pipe needs to be modified to fit this 3.15” Cover...

arashidynamics.com

HX30 and HE221 was designed for cummins engines of exactly the size you've got. All the TD05's are too big and generally used by patrol owners to throw mud at high rpm.

HX30 Super is ideal if you can fit it. It's physically quite big.

 

[frankenyota]

@Dougal My first choice was a HX30 but after some feedback from a tuner in NZ who had some experience with the 15B he told me that they were too small.
He recommended the TD05 18G and suggested going to a TD06 which has the bigger shaft.
Munroe racing also said TD05 would go great, go with a 16G under 20psi or 18G over 20psi boost.
I will have a look at the size of the HX30 super, l see alot of cummins guys use them.

 

[Dougal]

@Dougal My first choice was a HX30 but after some feedback from a tuner in NZ who had some experience with the 15B he told me that they were too small.
He recommended the TD05 18G and suggested going to a TD06 which has the bigger shaft.
Munroe racing also said TD05 would go great, go with a 16G under 20psi or 18G over 20psi boost.
I will have a look at the size of the HX30 super, l see alot of cummins guys use them.

No idea who any of those "tuners" are. But I guarantee they can't do the maths on turbine sizing.

TD05 and TD06 do not suit these 4 cylinders at all. They are only good for producing hot smokey dyno queens. They will not spool early or give you low end torque by my standards.

 

[frankenyota]

Have you heard of Kaiapoi Repowers?
I know @brisveganbj42 went with the HE221W and was very happy with the results.

 

[brisveganbj42]

Have you heard of Kaiapoi Repowers?
I know @brisveganbj42 went with the HE221W and was very happy with the results.

Ive got dyno sheets here but this is with beefed up injectors (+22%). 4.11 diffs on 35s too

Builds - 79 Aussie BJ55 build

my dreams are coming true.. i bought some q78s today

forum.ih8mud.com

 

[brisveganbj42]

This is what i went with. They are from cummins isde4 4.5L engines. Holset HE221W 4047745 4047746 HE221 (7cm) - https://www.benzforce.com/products/holset-he221w-4047745-4047746-he221-7cm

 

[Dougal]

Have you heard of Kaiapoi Repowers?
I know @brisveganbj42 went with the HE221W and was very happy with the results.

Yes. But the only thing I've seen from them are jetboat engines. Which are not what you want in a 4wd.

 

[brisveganbj42]

During my research I discovered there were lots of HE221W's with different specs which may explain the reason some folks think they are too small.

 

[frankenyota]

@brisveganbj42 with the +22 injectors will the HE221W keep up with the fueling?
Assuming more boost will help with the richer readings?
20psi by 1500 rpm

 

[KiwiDingo]

Kaiapoi and Munroe no their Sh1t! Absolutely listen to their advise. They do this for a living and with proven results in the real world. Be honest about what you expect from your setup and they'll give you the right information.

 

[frankenyota]

Appreciate all the feedback from people who have turbos 15B engines and others who have many years experience in turbo charging diesels. I think with the 15B not being a popular engine and a big capacity 4 cylinder with a multi valve head, it seems it could be more capable of running a larger turbo. Holset turbos definitely seem to be popular with the 4BT Cummins crowd, @Dougal.
Where would be the best place to find all the specs for a HX30 super for how much boost and HP it would make? JH hilux who builds a lot of 15B pumps tells me standard pump and injectors are good for 125hp. With pump and injectors done 200hp with running a TD05 16G. Everyone with a HX30 and TD05 16g has said they would go bigger next time

 

[bj70bc]

bigger isnt better, being well matched to rpm range and engine air flow is what it needs,
dyno doesnt tell the whole story, drivability is what you want

 

[frankenyota]

Definitely want the drivability and having 20lb of boost at 1500rpm sounds pretty good to me. Really want the low down torque more than a HP monster. Many years ago l worked for a Saab dealership and always liked the turbo 9-5 with a 2.3 petrol turbo engine as they had great torque, l know that’s not a landcruiser but it drove very nice. So l see what you mean by well matched and l think this is what Dougal is saying. I have read many posts in the diesel section that he has commented on and he knows his stuff so l was happy to get his input. This was the reason l posted in the diesel section, l am a mechanic but l work on big turbo gas engines and compressors. Not so many diesels anymore.

 

[bj70bc]

im very happy with my turbo sizing, listed in my signature, and the 3b being at 3.4l your 15b isnt that much bigger
i get full boost as soon as the exhaust can push it, theres no turbo lag, 20psi isnt a problem.
i built a log manifold just like yours, it works, not ideal, but youre not giving up too much doing it that way in these diesels, higher emp yes, which i think led to me having to use higher rated springs to keep the wastegate closed for the psi i was targeting

 

[FJBen]

@brisveganbj42 with the +22 injectors will the HE221W keep up with the fueling?
Assuming more boost will help with the richer readings?
20psi by 1500 rpm

Slightly different, but I’m running an HE221w on a 13bt. I picked the smaller size due to a smaller engine and I’m also at 5000’ elevation. Mine is the 5.5cm sizing.

Instant boost, 20psi no problem with just a tighten of the wastegate rod. Pulls great.

As stated the designed these for the Cummins engines in these sizes so they work great.

The size you would be better with would be Probabaly 7cm or even the 8.5cm twin scroll like @Nz Nath is running.


Here’s a short of mine in 3rd or 4th gear just flicking the throttle and you can see how easy it boosts.

 

[mudgudgeon]

Definitely want the drivability and having 20lb of boost at 1500rpm sounds pretty good to me. Really want the low down torque more than a HP monster.

This.
Low end torque is what gets then moving, and what makes then fun.
Torque is what suits you back in the seat.

I had a 2.5 litre TD Amarok work ute for a while. I hated the power delivery in it. It was laggy and then peaky. Slow to get moving, but then suddenly boost would come on.
It was quite unpredictable, and more than a few times, pulling out into traffic was scary, because the lag would catch me out, then boost would kick in as your making the turn into your lane.
On the highway, it would boogie along pretty good, still laggy when you stepped on it to pass.

4.2 litre landcruiser turbo diesels, totally different ball game. Step on the throttle, its ready to climb a brick wall from more or less idle up.

 

[Dougal]

Appreciate all the feedback from people who have turbos 15B engines and others who have many years experience in turbo charging diesels. I think with the 15B not being a popular engine and a big capacity 4 cylinder with a multi valve head, it seems it could be more capable of running a larger turbo. Holset turbos definitely seem to be popular with the 4BT Cummins crowd, @Dougal.
Where would be the best place to find all the specs for a HX30 super for how much boost and HP it would make? JH hilux who builds a lot of 15B pumps tells me standard pump and injectors are good for 125hp. With pump and injectors done 200hp with running a TD05 16G. Everyone with a HX30 and TD05 16g has said they would go bigger next time

My 4BD1T with an ancient T25 turbo (not even currently intercooled) is about 170hp and 550Nm on 22psi.
An HX30 Super on the same engine with an intercooler can do about 800Nm and 200kw.

None of those TD05's are any good on a slow revving 4 cylinder diesel. Toyota used the CT12B on these.

Turbos need to be right sized. Bigger than correct size sucks. You have less boost, more smoke, less torque and shorter power band. Drivability sucks and so does fuel economy because you can't pull the gears you need.

The guys saying they want a bigger turbo always mean they want a BETTER turbo. Bigger =/= better.