The 2H/12H-T/1HZ/1HD-T/1HD-FT Gturbo Alternative Tech Thread (9 Viewers)

[gerg]

The td05/06 compressors do suck for high boost. They are meant for gas engines. However, they are fairly small in comparison the similarly capable turbos and I like them a lot for that reason. That and the aftermarket support for parts. How much room do you have to work with n your engine bay?

 

[boosted105]

The td05/06 compressors do suck for high boost. They are meant for gas engines. However, they are fairly small in comparison the similarly capable turbos and I like them a lot for that reason. That and the aftermarket support for parts. How much room do you have to work with n your engine bay?

It’s a 105 series wagon so a fair bit, I was keen on garret but don’t want to drop 5k just on turbos hahah

 

[gerg]

No, the turbos for your needs should only cost a fraction of that. If you get Chinese knock offs I would rebuild them and rebalance them.

 

[boosted105]

No, the turbos for your needs should only cost a fraction of that. If you get Chinese knock offs I would rebuild them and rebalance them.

The TD06 has been built by MMP TURBOS and the TD05 is a kinugawa but I’m getting new bushes and shaft

 

[iVanDal]

Hi guys, mind me join in.

Just acquired a 80 series 1HD-FT with 600k, going to overhaul it. Currently thinking of changing the turbo. i see gturbo have a lot positive review.

but i have been a have a huge fan of EFR ballbearing turbo. I have use 6258 for 5 years 17psi in my 1.6L gasoline engine 300whp, still going strong. They also have a competitive pricing.

What do u guys think? i'm thinking of installing it in the 80. flange wouldnt be a problem, i can make an adapter for t25 housing. i also can custom a manifold but i rather use the stock manifold.

 

[Dougal]

Hi guys, mind me join in.

Just acquired a 80 series 1HD-FT with 600k, going to overhaul it. Currently thinking of changing the turbo. i see gturbo have a lot positive review.

but i have been a have a huge fan of EFR ballbearing turbo. I have use 6258 for 5 years 17psi in my 1.6L gasoline engine 300whp, still going strong. They also have a competitive pricing.

What do u guys think? i'm thinking of installing it in the 80. flange wouldnt be a problem, i can make an adapter for t25 housing. i also can custom a manifold but i rather use the stock manifold.

The only issue with EFR turbos is the wheel falling off:

I don't know if they fixed that issue. Because it was the only problem but quite a big one.

 

[iVanDal]

The only issue with EFR turbos is the wheel falling off:

I don't know if they fixed that issue. Because it was the only problem but quite a big one.

Yes I'm aware of that video, it wa

The only issue with EFR turbos is the wheel falling off:

I don't know if they fixed that issue. Because it was the only problem but quite a big one.

Yes I'm aware of that vid, they have fixed them even before I use them 5 years ago, use my 6258 for track, few runs at 29 psi but still ok. I just really new on diesel. So I still can't figure what size too big or too small for the engine. Usually use GTX Garret for comparison, but I think not many use aftermarket turbo on this engine. Just gturbo and many oem turbo. Too bad gturbo don't share their spec sheet.

 

[Dougal]

Yes I'm aware of that video, it wa


Yes I'm aware of that vid, they have fixed them even before I use them 5 years ago, use my 6258 for track, few runs at 29 psi but still ok. I just really new on diesel. So I still can't figure what size too big or too small for the engine. Usually use GTX Garret for comparison, but I think not many use aftermarket turbo on this engine. Just gturbo and many oem turbo. Too bad gturbo don't share their spec sheet.

They weren't fixed 2 years ago for this guy: Borg Warner EFR 6258 Turbo - Page 3

As long as you know the risks, go for it. Borg Warner were pushing people into bigger frame turbos to keep the reliability. Shame they couldn't just offer a steel wheel version. The inertia wasn't a big concern for the diesel market. Their blade geometry was the big improvement.

 

[gerg]

I'd love to use Borg Warner stuff if they offered everything the same with a regular incolnel turbine. The way they handle catastrophic turbine failure warranty issues and engine damage has turned me off of them for the forseable future. It's sad cus it's the only thing that holds me back.

 

[boosted105]

So after speaking to my engine builder he is keen on helping me with the compound set up.
Got some More information on the primary turbo, it’s an 18g short wheel with the 6cm rear so it’s going to spool up quick. Just going to have to sort out another wastegate and what size rear to use on my TD06. Will be interesting to see what response is like when complete.

 

[gerg]

a 20g maps better and you will want to turf that 6cm and put a 10cm on or larger. Has your builder built compounds before? If he hasn't I'd go to somebody that has. It's a lot more complicated than you might think. When you do it build it so you can swap exhaust housings for tuning. The likelihood of getting a set up you want to keep on your first go around is minimal.

 

[boosted105]

Yeah thats why I was asking for advice on turbo setup.

Do you split the boost fairly even? eg. i want to run 35 psi so do I go 15 on small and 20 on large turbo?

 

[gerg]

When you say primary, do you mean low boost or high boost, or small or large turbo? Depending on how you look at it the primary can be either. Exhaust pathing or Intake pathing.

 

[gerg]

Advice is free my friend. I'll have to remap to see actual pressures but I was planning on running 2pr on each but that's mainly cus the maps suck. That will get you into the mid 30s and your turbos won't be overly stressed. In a perfect world I'd run the small turbo harder and let the large turbine breath to drop as much drive pressure in between the turbines.

 

[boosted105]

Primary is my small turbo the 18g, what do you mean by 2pr?

I think you are right though, run the little turbo hard but still in its efficiency range. The hard part will be finding when to get the big turbo to take over while keeping both efficient.

 

[gerg]

Pressure ratio. It's easier to speak in pressure ratios rather than psi with compounds cus psi doesn't have a direct relationship to the high pressure (small) turbos compressor map.

 

[boosted105]

Pressure ratio. It's easier to speak in pressure ratios rather than psi with compounds cus psi doesn't have a direct relationship to the high pressure (small) turbos compressor map.

Hey I didn’t see your previous reply about sizings.

The engine builder has had multiple compound setups on his patrol in forms of garret, mhi and he has done other customer cars as well.

The large turbo is a td06-20g with 10-12cm rear (still deciding rear)

The smaller turbo is a td05-18g short wheel with 6cm rear and will be upgrade to 360 thrust collar.

This may sound silly but I have never really dealt with pressure ratios, is that the pressure ration between dump and turbine inlet?

 

[Dougal]

Hey I didn’t see your previous reply about sizings.

The engine builder has had multiple compound setups on his patrol in forms of garret, mhi and he has done other customer cars as well.

The large turbo is a td06-20g with 10-12cm rear (still deciding rear)

The smaller turbo is a td05-18g short wheel with 6cm rear and will be upgrade to 360 thrust collar.

This may sound silly but I have never really dealt with pressure ratios, is that the pressure ration between dump and turbine inlet?

A 6cm TD05 will drive an 18G compressor into surge. That's why MHI didn't put that combo together. You shouldn't go bigger than 16G6 with a 7cm TD05H.

Compressors and turbines need matched for power requirements.

 

[gerg]

If he's built stuff before then that is great. It really helps knowing how to nest stuff. Ask him though why he uses such a large compressor on the high pressure turbo. It will want to surge from the high temp air from the low pressure turbo. It actually wants to get close to surge even in a single turbo set up.
Yeah pressure ratio describes the ratio of turbo inlet vs turbo outlet pressure. It helps when your dealing with inlet pressures that are not 14.7psi. if you grossly oversize your low pressure turbo then you can mitigate the low rpm surge risks but a smaller compressor will be safer and give you lower outlet temps and require less power to run etc....it's just a more effecient fit. That's why I recomended a 14g.

 

[boosted105]

A 6cm TD05 will drive an 18G compressor into surge. That's why MHI didn't put that combo together. You shouldn't go bigger than 16G6 with a 7cm TD05H.

Compressors and turbines need matched for power requirements.

My mates is running it on his ute at the moment with 42psi making over 300hp (1kd hilux) it holds full boost as long as you hold your foot flat.