The 2H/12H-T/1HZ/1HD-T/1HD-FT Gturbo Alternative Tech Thread (8 Viewers)

[gerg]

Now that's some good info. What turbo is that?

 

[IanB]

View attachment 1580336

Mmp's smallest 100% bolt on turbo for the 1HD-FTE at 24 psi making 240rwhp and 655 nm of torque with ultra lean AFR's of 23.6:1 - This turbo has maxed out the stock fuel system.

Turbo has plenty more left in it With +30 injectors the setup will yield 300+hp

Looks like boost comes in early too, at what RPM are you seeing boost? What gear did you run it in?

 

[Mcreight911]

Now that's some good info. What turbo is that?

It's the hiflow ct26 upgrade @MMPTurbos does for the 1hd-fte
the mmp stage one .

 

[Mcreight911]

Looks like boost comes in early too, at what RPM are you seeing boost? What gear did you run it in?

I didn't do this one, it's from Brendan Cook at diesel performance unlimited .

 

[Mcreight911]

I'm told the pump was a bit sad so with a good fuel system response and top end power would be better again

 

[MonsterCruiser]

Rolling start WOT with my MMP:

 

[GooSe77]

I've read the first 40 pages and the last 3 - still git a headace

I plan to buid a hybrid/highflow CT26 to fit on a 12HT. Goal would be lower egt and low rpm boost. I undestand that the bigger copmressor ( 7mgte ) will bring lower egt and a smaler turbin low rpm boost. I have a 7mgte housing on the way to me, will put in an 11 blade Maba wheel - gues thats gonna work.
But I have problems with the turbine side .....
https://www.ebay.de/itm/MAMBA-Turbo-Turbine-Wheel-TOYOTA-CT26-3SGTE-1HD-FT-12HT-13BT-14BT-7MGTE/192454659077?_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=48423&meid=74509d7faa464a608bb9c57f9180782d&pid=100005&rk=3&rkt=8&sd=192451381091&itm=192454659077&_trksid=p2047675.c100005.m1851 - that fits in the original CT26 and the 3SGTE - I thougt that would be smaller ?

Or is there an other solution to get low rpm boost without switching the housing using some kind of modern turbin spool ?

 

[mudgudgeon]

I've read the first 40 pages and the last 3 - still git a headace

I plan to buid a hybrid/highflow CT26 to fit on a 12HT. Goal would be lower egt and low rpm boost. I undestand that the bigger copmressor ( 7mgte ) will bring lower egt and a smaler turbin low rpm boost. I have a 7mgte housing on the way to me, will put in an 11 blade Maba wheel - gues thats gonna work.
But I have problems with the turbine side .....
https://www.ebay.de/itm/MAMBA-Turbo-Turbine-Wheel-TOYOTA-CT26-3SGTE-1HD-FT-12HT-13BT-14BT-7MGTE/192454659077?_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=48423&meid=74509d7faa464a608bb9c57f9180782d&pid=100005&rk=3&rkt=8&sd=192451381091&itm=192454659077&_trksid=p2047675.c100005.m1851 - that fits in the original CT26 and the 3SGTE - I thougt that would be smaller ?

Or is there an other solution to get low rpm boost without switching the housing using some kind of modern turbin spool ?

The supra hybrid is built with 7MGTE components. No idea if 3SGTE parts will work for you.

1HD-T, and Supra 7MGTE use the same turbine but a different sized turbine housing (different A/R). Same CHRA, Supra has larger compressor and housing to suit. Compressor housings have some differences in bolt locations for wastegate mounting etc
The simplest way to build a hybrid is to swap turbine housings.

An all Toyota upgrade is to use a complete 1HD-FTE turbo. It had a smaller CHRA. smaller turbine, slightly better turbine design, smaller turbine housing (physically smaller, and smaller A/R), and compressor wheel is the same size as Supra 7MGTE.
It is basically a bolt in replacement, there is some differences. Front housing is current with bolt on inlet, outlet pipes. Oil feed/return line is slightly different. Exhaust housing is the same, so exhaust will bolt up, manifold flange is the same too.

1HD-FTE turbo is Toyota's early boost, high flow upgrade.

See link in my signature

 

[GooSe77]

THX I'll have a look at your link.
So if I only went the high flow way with the supra parts, what exactly is the effect I'm gonna get ? "Just" lower EGTs or also more effecinet ?

 

[mudgudgeon]

If you fit a 1HD-T/Supra hybrid and change nothing else and don't touch fueling, power should stay about the same, EGTs should be lower, turbo won't be working so hard to shift the same amount of air.
Spool up might be slightly slower as it will take more energy to drive a bigger compressor, but once spooled up, it will be pushing more air than the stock turbo at any given psi
Efficiency totally depends on your right foot.

 

[GooSe77]

THX, I will change the fuel settings and ad some more boost as soon as the engine is run in

 

[Dougal]

I've read the first 40 pages and the last 3 - still git a headace

I plan to buid a hybrid/highflow CT26 to fit on a 12HT. Goal would be lower egt and low rpm boost. I undestand that the bigger copmressor ( 7mgte ) will bring lower egt and a smaler turbin low rpm boost. I have a 7mgte housing on the way to me, will put in an 11 blade Maba wheel - gues thats gonna work.
But I have problems with the turbine side .....
https://www.ebay.de/itm/MAMBA-Turbo-Turbine-Wheel-TOYOTA-CT26-3SGTE-1HD-FT-12HT-13BT-14BT-7MGTE/192454659077?_trkparms=aid=222007&algo=SIM.MBE&ao=2&asc=48423&meid=74509d7faa464a608bb9c57f9180782d&pid=100005&rk=3&rkt=8&sd=192451381091&itm=192454659077&_trksid=p2047675.c100005.m1851 - that fits in the original CT26 and the 3SGTE - I thougt that would be smaller ?

Or is there an other solution to get low rpm boost without switching the housing using some kind of modern turbin spool ?

That turbine wheel is a paddle-wheel. Very inefficient which gives you poor response, high drive pressure and robs power. This is the #1 reason to not use the CT26 turbos.

CT20B (1HD-FTE etc) is a better turbo than any upgraded CT26.

 

[GooSe77]

I don't think I will find a 1HD FTE Turbo for a "cheap" price ... so tuning the CT26 is stinn an option ...
How does the housing size effekt the sppol up ? the 8 or 7cm housing you can get from Manba for example.

And are there better turbine wheels for the CT26 available ?

 

[mudgudgeon]

8cm is too big.
The bigger the housing, the more gas it takes to drive it, the more fuel and heat you need to get it to spool.
Smaller housing will spool quicker

1HD-T has a 8cm turbine housing, Supra is bigger.
1HD-FTE turbo has a 6cm housing, and smaller turbine, with more efficient design.

From page 50

1HD-T A/R .65
1HD-FTE A/R .54

 

[mudgudgeon]

Mamba do a 1HD-FTE cored turbo to suit 1HD-T

MAMBA For TOYOTA 1HD-T Landcruiser Turbo w/ 1HD-FTE CT12B Core + Turbine Hsg | eBay

 

[GooSe77]

1HD-T has a 8cm turbine housing

Where is the place those 8 ore 7 cm ar measured ? Is that the size of the "pipe" tjat is blowing on the turbine ?
So switching to a smaller 7cm would help to fasten spool up. I'm not looking for a maximum performance turbo, just better performance for a decent amount of cash

Mamba do a 1HD-FTE cored turbo to suit 1HD-TT

I gues you mean this one ?
TOYOTA 1HD-T turbo w/ 1HD-FTE CT12B Core & Turbine Hsg
That also has a 7cm housing. Besides that, I would like to keep Turbo looking as stock as possible

 

[mudgudgeon]

If you Google how to measure A/R on a turbo housing, you should find some diagrams. Garrett Honeywell have some in their tech pages.

It's the cross sectional area of the end of the nozzle

 

[mudgudgeon]

Where is the place those 8 ore 7 cm ar measured ? Is that the size of the "pipe" tjat is blowing on the turbine ?
So switching to a smaller 7cm would help to fasten spool up.

Yep, basically.

1HD-FTE turbo spools up early, gives effortless low down torque, makes for great driveability.

 

[GooSe77]

THX, I'll post the results when I'm done with the engine ...

 

[remy]

1hdt housing is the smallest. Somewhere around 0.40 A/R