1HD-T Turbo & Performance Options (1 Viewer)

[canadian bum]

Well I was on a long trip in a friends HDJ81 and noticed that the EGT's seem to climb up easily and the boost is pretty low 16-17psi (low compared to North American diesels). Most guys on mud don't boost over 20 psi. I guess I just got used to this number as being big boost for these engines.

However I spend sometime around some pretty powerful diesels. Some 5.9L Cummins engines 12 and 24 valve with compound twin turbos one running 70 psi boost, and another with 60 psi. Also some single turbo trucks running in the 35 psi range. And then some older Ford Powerstrokes with no intercooler running around 20 psi stock. The non intercooled powertrokes EGT's increase with the loss of boost when there turbo's lose boost. I did some research seems to happen now and then.

So what I want to do is see what there is for turbo options out there and put a different turbo on. I am wondering what turbos have the same flange as the CT26. I'm thinking about boosting in the 30 psi range with no intercooler since I can't fit one. I will probably stud the head even though that is probably a bit overkill. I am going to inspect the bottom end components when I rebuild my engine. Won't be as heavy as a 5.9L but I'm sure its stout enough to run what I am looking at.

What do you guys think? Probably going to get a lot of negative responses but just mixing in some of my other diesel knowledge and 16psi performance boost is well not much at all even for an engine with no intercooler.

 

[canadian bum]

So looking at finding a Holeset HX30. Or something that matches the dimensions and bolts up to the exhaust manifold. I think that this turbo should work fairly well, but opinions are welcome.

 

[Tapage]

Honestly and personal I will love boost my 1HD-T to the sky .. but I'm bit scary to blow my engine .. coz that would cost time and money that I don't have right now ..

But I woul love to see something out the box and push the 1HD-T to the real limits .. just to know the limits ..

The rotary IP zexel bosh in the 1HD-T it's pretty capable .. well at least under 20 PSI of boost .. so fuel isin't the issue boosting up ..

I woon't be worried about turbo bolt pathern .. since you can solve that easyly with a flange .. and would go in the Garret GT line something bigger than the GT2860R

I also would do a top mounted intercooler .. or air water one ...

 

[canadian bum]

Don't have the room for the intercooler. I will let you know how it works out. I will take a look at the components of the engine and judge from them. In the diesel world 30 psi isn't much unless your running a higher compression ratio like the N/A engines. So some experimentation is in order. I know the stock turbo can't do it. So I will keep my eyes open for something better.

 

[Hulsty]

When I have some more time (xmas shopping! great) I will find you some more info.

But I know of guys running 25+psi in stock and modded 1HZ's without to much issue.

Yanmar 315HP 1HDFTE I think these run about 30psi boost and run continuously at 255mhp @ 3600rpm

YANMAR Diesel Power - LPA Series Marine Engine

"A Yanmar 6LP-DTP is a 1HD-T Base engine, all the same internals, but running a 1HD-FT kinda speced fuel pump. if that makes sense.

A Yanmar 6LP-STP Is a 1HD-FT Base engine with a modified VE pump. The Crankshaft, Con Rod's and all the power cylinder equipment are same same as toyota. Yes i know this as i spent over 12mths doing my homework. I work in the industry and know all the right people.

As a yanmar engine they are capable of 315hp in base fom, but the way it performs is way off to what is needed in a car application, It brings boost on way to violently and would destroy drivetrain, but works fine for driving a fixed load(Prop) as it was intended.

I Started my project with a 1HD-FTE Engine, pulled of tall the electronics and threw them in the bin. Yes is it is possable, Yes it is VERY EXPENSIVE, time consuming, and painfull as i will tell you, i'm just starting to play around with a compound turbo setup to over come the first couple hundred rpm of lag and overfuel, and it's doin my head in.

But the end result of a Compound Turbo 400+hp, 1000Nm@ 1400rpm Sleeper will be worth every bit when she rolls up beside a TD42 Patrol or even one of them new oil burnin V8 toyotas.. And with not a electronic devide fitted anywhere

Just got to put it back togeather again after a few tweaks and get round to workin out the final points of getting it realiable and drivable. But got other projects on the go that need my attention first."

 

[bsmith123]

increasing power

TheDieselPage.com - 6.5TD Power & Performance Project

This might interest you

Thought it was interesting that they lowered compression to compensate for increasing boost, and it is worthy to note how much attention they gave to making sure the cooling system was adequate for the job ---that seems smart to me. I also like the fact that longevity as well as performance was a goal.

I'm with TAPAGE over on the safe side but find it interesting , but I wonder if our old 40s/45's etc are even up to this kind of power without major mods from front to back, I would not think I could get 700 ft lbs/1000nm to the ground in my 40 in a usable way and at 1400 rpm what it would tear up?

I thought just putting the 1HD-T in my 40 was "hot rodding" it

Finally, would you guys just knock it off already? I dont want to have to put my TBSS on the bottle just to keep up with a bunch of 40 year old Cruisers!

 

[girraffe]

the 1hd-t parts system shows 3 different thicknesses for 1hd-t head gaskets. i often consider doing the bb and bigger comp wheel mods that the supra guys do and going for the thickest hg i can get... that would be fun!

 

[Hulsty]

Z()LTAN I think he runs about 25psi with a massive cooler though a stock 1HZ.

https://forum.ih8mud.com/70-series-tech/143839-operation-soa-75-a.html

YouTube - West oz challenge - SOA 75 Starting the Night stage

YouTube - 1HZ Turbo @ over 20psi

Ishobie is running a stout 1HZ setup.

https://forum.ih8mud.com/70-series-...nstall-turbo-inercooler-exhaust-manifold.html

From Ishobie

There is a guy on the outerlimits board running 24psi with a modified pump and large turbo, he is turning 5-6000 rpm and the power is nuts. He's got over 30,000 kms on it since I last talked to him lasty year - works like a charm, here it is in action:

MVI_9377.mp4 video by Hulsty5 - Photobucket

A decent thread

https://forum.ih8mud.com/diesel-tech-24-volts-systems/394324-how-much-boost-can-1hz-t-handle.html

 

[YardPig]

MVI_9377.mp4 video by Hulsty5 - Photobucket

I think my penis just moved...

 

[canadian bum]

The thing is the 1HZ has a higher compression ratio than a 1HD-T. So in theory the 1HD-T can handle the same amount of boost with less stress on the engine. As for the 45 handling the power I think it will just fine. Trac-bars front and rear should eliminate any kind of destructive axle wrap. And with a sort of exo skeleton the frame should be more rigid. If I have frame problems I could always plate it.

The 12H-T won't be too crazy but I will tweak it a little as well. I just hope the drivetrain holds together. I'm not going to be hard launching the thing just like to be able to pass and hold speed easily. And well power on tap is always nicer than wishing for more.

Hulsty I agree with what you are expecting for power numbers. And don't see them to be out of reach by any means. Looking forward to see what you come up with. My biggest fear when it comes to diesels is High RPM. I don't think they should be modified for high RPM's because there is a lot more mass swinging around and a lot more potential for a thrown rod. But big boost... bring it on.

 

[bsmith123]

wow

wow, love those utes

 

[bsmith123]

YouTube - TOYOTA LANDCRUISER 1HZ-turbo

This vid came up with the others according to the comments 1hz with a 1hd-t turbo

 

[bsmith123]

1HZspecifications

22.4:1 1HZ

Toyota HD engine - Wikipedia, the free encyclopedia@@AMEPARAM@@/wiki/File:Scheibenbremse(Kfz).JPG" class="image"><img alt="Stub icon" src="http://upload.wikimedia.org/wikipedia/commons/thumb/3/37/Scheibenbremse%28Kfz%29.JPG/43px-Scheibenbremse%28Kfz%29.JPG"@@AMEPARAM@@commons/thumb/3/37/Scheibenbremse%28Kfz%29.JPG/43px-Scheibenbremse%28Kfz%29.JPG
18.6:1 1HD-T

according to these unofficial sources quite a diff in compression which makes sense for a NA vs turbo engine I suppose

 

[canadian bum]

1HZspecifications

22.4:1 1HZ

Toyota HD engine - Wikipedia, the free encyclopedia
18.6:1 1HD-T

according to these unofficial sources quite a diff in compression which makes sense for a NA vs turbo engine I suppose

Yeah that sounds about right. Most N/A engines run in the 21-22 ratio. So I guess the question is turbos. These guys are obviously not running the CT26 or there would have been bits of turbo flying out the exhaust pipe.

Need something that doesn't have lots of lag since I'm not planning on pounding the engine all the way to 6000 rpm. Just run the stock rpm range. I have a few turbos in mind. One being the HX30, a turbo off a John Deere 4.5L 4 cylinder. Or others that run around the same specs. I will read Z()ltons build again I did once a long time ago but forget the details.

 

[Tapage]

There is a guy on the outerlimits board running 24psi with a modified pump and large turbo, he is turning 5-6000 rpm and the power is nuts. He's got over 30,000 kms on it since I last talked to him lasty year - works like a charm, here it is in action:[/URL]

ooaaaaaaaaa ..!!!!!!!!

That's what I'm talking about .. that's powa .. and I want it !

 

[ToyRoverlander]

1HZspecifications

22.4:1 1HZ

Toyota HD engine - Wikipedia, the free encyclopedia
18.6:1 1HD-T

according to these unofficial sources quite a diff in compression which makes sense for a NA vs turbo engine I suppose

More like DI verses IDI. From what I know, the IDI needs that extra c/r to create more heat for starting as the precup soaks up a lot of heat.
Turbo engines usually are DI.

 

[Dougal]

Most of this has been covered before, here's basically the scoop.


Zoltan isn't running that much power and it's also a play truck. You'd need a hole in the head (and will get one) if you run a 1HZ like that for a daily driver or a tow vehicle. I've got one of his dyno plots here from 10psi boost and that was 106kw, presumably at the ground. Still looking for his other ones.
I suspect he went with the 1HZ because it revs higher (5000, not 6000), which can make the difference for comps.
Because the 1HZ is a rather inefficient engine it needs a lot more fuel and boost to make power.
My calcs put his 25psi boost at about 500Nm. A 1HD-T with the same fuel and boost would make around 640Nm.

Here's a guy who also fitted a GT2876R to a 1HZ, he's got engine issues 9 months later:
http://outerlimits4x4.com/ol3/viewtopic.php?f=8&t=215758&p=1956215#p1956215

The yanmar engines had lowered compression, probably with different pistons and rods.
The 4 valve yanmar produces 286hp on about 27psi boost continuous. The 315hp is intermittent.

A 4.2 diesel producing about 1000Nm needs about 60psi boost. I'll believe that when I see it.
I've seen plenty of claims of 1000Nm, all were BS. One big problem is inept dyno operators getting the gear ratio wrong which puts the scale of the torque graph out.

Don't confuse noise and power.

 

[ForealBoreal]

as crushers says its your right foot that kills an engine. EGTS are the enemy.
Boost is ok.

 

[Dougal]

as crushers says its your right foot that kills an engine. EGTS are the enemy.
Boost is ok.

That's rubbish.
Your right foot can only request the power that's there. If any engine can't survive under the power it can produce then it's a serious problem.

 

[canadian bum]

That's rubbish.
Your right foot can only request the power that's there. If any engine can't survive under the power it can produce then it's a serious problem.

I agree with this statement more than EGT's, yes they do kill an engine but you can monitor it easier than your engine components failing. My friend running 70 psi boost in his 5.9L Cummins is well within the safe zone on EGT's and in fact has to work really hard to get it hot. However if he runs it in the 70 psi range for long he blows a little coolant out of the head gasket because the head is being pushed off the block. He isn't worried because he has a fire ringed and o-ringed head with studs sitting waiting for when his head gasket does blow.

We will eventually dyno the 1HD-T on a rear wheel chassis dyno. There is a big performance diesel competition up here that we can dyno it on so all the mods should be done by then.