1HZ, 1HD-T, 1HD-FT......

[VTCruiser]

My Haynes manual makes it sound like these motors are essenitally the same in the bottom end. It is somewhat vague but the three motors are often lumped together for procedures and summaries. I am aware of the cyl head differences and such, but are the bottoms ends the basically same? To what extent? What are the major differences? TIA

giddyup

 

[s79bj40]

i would imagine that dimentions and such are about the same and everything is in generally the same places, but there may be differences in the oiling and bearings. I dont think it would be worth trying to mix and match heads and blocks.

 

[bad_religion_au]

i know 1hz has different oiling, as the other two were built for a turbo. i also think later 1hd-t had different bottom end bearings as they kept fuggin up

 

[beanz2]

The cranks and the rod end bearings are the same, at least between the 1HZ and the 1HD-T. I can't see much of an oiling system difference either. The 1HD-T block has provisions for turbo oil supply.

Dave

 

[bad_religion_au]

i was told that the 1hd-t had piston oiling jets or something snazzy... never claimed i knew it all... still wish i'd listened to doug (ex toyota mech) a bit more. they had to change the bearing type once the first 1hd-t bearings started to go... your probably right that they were originally 1hz bearings, but have been changed since... although i never torn into one myself, so take my advice with a grain of salt

 

[VTCruiser]

I dont think it would be worth trying to mix and match heads and blocks.

That's exactly what I was thinking How bad would it be to have a Turbo'd DI 1HZ! Just use an aftermarket turbo kit for the 1HZ (minus the exhaust manifolds, use factory 1HD-T or 1HD-FT?) and no more woring about blowing out pre-chambers... : 24V sounds even more intoxicating..... 8)

 

[beanz2]

The exhaust manifold off the 1HD-T will bolt on to the 1HZ, but the 1HD-FT has a different bolt pattern. Bolting on a turbo kit on a 1HZ will not give you DI though. You need the whole a 1HD-T head. By then you might as well as get a whole engine.

Dave

 

[rick_d]

HZ's have piston skirt oiling as well.

a HZ block can be made into a HD-T easily if all that is missing is the high pressure turbo tap. The low return is a freeze plug on HZ's.

heads for HD-T's are $$$$

crank for HZ + HD-T (12 valve)
rods, different...

 

[VTCruiser]

[quote author=beanz2 link=board=21;threadid=14833;start=msg139620#msg139620 date=1082041774]
The exhaust manifold off the 1HD-T will bolt on to the 1HZ, but the 1HD-FT has a different bolt pattern. Bolting on a turbo kit on a 1HZ will not give you DI though. You need the whole a 1HD-T head. By then you might as well as get a whole engine.

Dave
[/quote]

Haha, swapping complete heads (and manifolds) is what I was implying when I was talking about DI. Sorry for the vagueness.

Rick- I would imagine aftermarket 1HZ turbo kits would have all the necessary parts for adapting the turbo so maybe its just a matter of swapping heads and manifolds for DI (?).

 

[beanz2]

Gehn,

By the time you've sourced the 1HD-T head, you might as well as get the exhaust manifold and the turbo itself. If you're at that point, you might as well as get the whole engine as I said.

Dave

 

[Radd Cruisers]

Okay I`ll bite..........

Hows about a 315 HP Yanmare/toyota engine at 3300RPM with gobbs of torque.

A mear 18000US will buy you one of those rockets, all ya have to do is de-marinize it.

Now that sounds like a cool engine for the 80 buggy with portals.

 

[beanz2]

That would be real tricky to adapt the water to air intercooler, Rob

Dave

 

[Radd Cruisers]

[quote author=beanz2 link=board=21;threadid=14833;start=msg140927#msg140927 date=1082246721]
That would be real tricky to adapt the water to air intercooler, Rob

Dave
[/quote]

I agree Dave, sure would be one coool setup.

Wonder why thier bearings are holding up for 8000 HRs with 300HP?

Rob

 

[Landpimp]

Yanmar.........not Yanmare......

not quite the same as a Toyota from what I gather, but badass motors.

think they come in twin turbo versions 8)

[quote author=Radd Cruisers link=board=21;threadid=14833;start=msg140811#msg140811 date=1082228947]
Okay I`ll bite..........

Hows about a 315 HP Yanmare/toyota engine at 3300RPM with gobbs of torque.

A mear 18000US will buy you one of those rockets, all ya have to do is de-marinize it.

Now that sounds like a cool engine for the 80 buggy with portals.
[/quote]

 

[Radd Cruisers]

[quote author=Landpimp link=board=21;threadid=14833;start=msg141955#msg141955 date=1082431919]
Yanmar.........not Yanmare......

not quite the same as a Toyota from what I gather, but badass motors.

think they come in twin turbo versions 8)
[/quote]

Ya.... my speling suks and the Yanmar is a sweet little engine coming in a hole less lighter than the Cummins.

Not sure of the twin turbo design, I will ask a couple of folks in Florida, they are the guys trying to sell me the Yanmar instead of the cummins. But would that engine kick as in a 80 series???

You gotta remember that these two engines make HP at two different RPM and torque is quite a bit different.

Apples and Oranges.................