Please tell me about the 1HZ

[Tapage]

The 1HZ it's a excelent engine .. but one time you drive a turbo diesel .. you never wanna go back. I didn't realiced how I drive ( mountains and flat ) and wheel my 2H without a turbo ..

I went with Pyro many years ago .. it I always been with my diesel turned up to have this extra ponies .. always watching my EGT's ..

Now with turbo .. ja .. 2.5 turns to the pump and now I'm care of my head in the egine ( water temp not EGT ) coz I have to much power for my coolings sistem ..

The message it's .. you can drive long time NA engine .. but with turbo you will be in the next step ..

 

[Tapage]

Forget .. usually the Mitsu engines here ( 2.8 4M40 ) had those problems with the turbo seals and the engine goes crazy with the oil from the turbo in the intake and the combustion chamber ..

 

[Ron R]

I can see the advantages of having a turbo and more ponies. But I also can see the disadvantages......
I think I'll stick to my stock HZJ73.....

 

[rchalmers3]

Greg H.,

You mentioned an intention of using yer rig on grades and at altitude. For this type of use, the turboed motor does way better than NA. Altitude compensation is an important feature for you.
IMO, a factory engineered turbo motor will be your most reliable power plant. Can't beat the corporate brains and the motors are proven reliable over time.
With good maintenance and EGT monitoring you have the ability to reduce and almost eliminate the added risk due to complexity.
I think this was the point about pneumatic tires raised by roscoFJ73. You cannot eliminate risk completely.

Rick

 

[watrob]

Hi, I put a 2H toyota diesel in my FJ40. Got more torque than I know what to do with. At 2000 revs it is doing 80kph and at 2500 revs it is doing just a little over 100kph.

I can idle over soft beach sand in 2nd gear. I looked at the a turbo (12HT) but did not want the hassles of more moving parts. Anyway if your idling whats a turbo going to do.

My $0.02.

 

[Ron R]

Wow, that's a nice rig you have there!!!
Will read the thread about the resto project.

 

[Dougal]

My biggest question, why didn't they make a non turbo direct injection? I think a 1-HD would have been the cats pajamas.

 

[Greg H.]

Hi, I put a 2H toyota diesel in my FJ40.

snip

At 2000 revs it is doing 80kph and at 2500 revs it is doing just a little over 100kph.

That is about what I'm currently doing on level ground with the 3B.

 

[watrob]

That is about what I'm currently doing on level ground with the 3B.

With the fact that my FJ is all fibreglass now the 2H has more than enough grunt. For the beach its perfect, at 1500 revs in top gear through soft beach sand its great.I know some people with the 2H in the troopie feel its under powered but the troopie is heavy, probably a 1000lbs heavier than my FJ.The long range 110ltr diesel fuel tank means I only need to fill it up every month and it is a quiet diesel motor also.With around another 250,000klm left in the motor I will be dead before it needs a rebuild, the body won't rust and the chassis has been hot dipped in gal, all nuts & bolts are stainless, hey I am in heaven already

 

[Dougal]

the body won't rust and the chassis has been hot dipped in gal, all nuts & bolts are stainless, hey I am in heaven already

We need more photos.

 

[roscoFJ73]

We need more photos.

Try the link in his signature. Its not a fart button ,I promise

 

[Dougal]

Try the link in his signature. Its not a fart button ,I promise

Holy crap that's clean. Nice job.

 

[mac]

My biggest question, why didn't they make a non turbo direct injection? I think a 1-HD would have been the cats pajamas.

Because losing the turbo is a major downgrade. DI is a perfect fit for Tcharging with lower compression.

Turbochargers are inherently reliable devices and usually give lots of warning of impending death. If there is a question- do a rebuild and you're good for another 250-400k kms- more if you drive an OM617 mercedes.

I don't know why people go on about questionable reliability and Tchargers. They last longer than the t-belt...

In addition, diesels and Tchargers were made for each other.

 

[Dougal]

Because losing the turbo is a major downgrade. DI is a perfect fit for Tcharging with lower compression.

Turbochargers are inherently reliable devices and usually give lots of warning of impending death. If there is a question- do a rebuild and you're good for another 250-400k kms- more if you drive an OM617 mercedes.

I don't know why people go on about questionable reliability and Tchargers. They last longer than the t-belt...

In addition, diesels and Tchargers were made for each other.

I know the turbo version is better, but why did toyota go for IDI in all the non turbo ones and DI only on the turbo ones?

 

[roscoFJ73]

I know the turbo version is better, but why did toyota go for IDI in all the non turbo ones and DI only on the turbo ones?

IDI is quieter . Maybe they didnt want a turbo ready engine sitting in there when they charge $5-6kmore for the same thing with a turbo

 

[mac]

Some DI are louder but the 1HDT is a very quiet diesel.
I think the lower compression of a DI diesel lends itself better to a turbo as opposed to it's higher compression, precup dropping brethren.

 

[roscoFJ73]

Some DI are louder but the 1HDT is a very quiet diesel.
I think the lower compression of a DI diesel lends itself better to a turbo as opposed to it's higher compression, precup dropping brethren.

I believe its the turbo which quietens them down

Question: How often do their brethren drop precups?

Answer: About 1/100 of the number of 1HD T with BEB bearing failures LOL

 

[mac]

I believe its the turbo which quietens them down

Question: How often do their brethren drop precups?

Answer: About 1/100 of the number of 1HD T with BEB bearing failures LOL

AHHH, right you are! Actually 1HZ's seem to drop precups a lot less than 3B's.

As for the turbo quieting things down- I don't know about that. Diesel noise is not the same as exhaust noise. Rather it is the sound of combustion resonating through the head, injector lines and head. It can change dramatically with timing.

 

[Greg H.]

AHHH, right you are! Actually 1HZ's seem to drop precups a lot less than 3B's.

As for the turbo quieting things down- I don't know about that. Diesel noise is not the same as exhaust noise. Rather it is the sound of combustion resonating through the head, injector lines and head. It can change dramatically with timing.

Ok, you guys just lost me.

Precups?

What is that ?

 

[BillyGHusk]

Someone will provide a much better definition than this, but in short it is a Pre combustion chamber.

The diesel partial combusts in the the precup that combustion is what then forces the rest of the fuel air mixture in the the cylinder.

I think......

Tim