Which Engine for a 70 Series Build??

[Eco 45]

So I have a couple of unique 70 Series projects in the pipeline and I am stuck between two engines: Toyota 1HZ like new and new Cummins 2.8 crate engine, both on hand.

1HZ
-Toyota 6 cylinder diesel
-Mechanical
-4.2 Diesel 96Kw @ 4000rpms, 285Nm@2200rpms
-800 LBs

2.8 Cummins
-4 cylinder turbo diesel
-very electronic
-2.8l - 120kW @ 3600 rpms, 360Nm from 1800 to 3000rpms
-500 LBs

Numbers and weight are in favor of the Cummins.

Which would you choose between for a 70's series build?

 

[coldtaco]

As much as I like keeping it all Toyota, it sure would be fun to see the new Cummins in a 70 and get feedback as to drivability and power and mpg. Of course behind a manual trans.

 

[Devils Paw 80]

Two projects, two engines. You're good-use'em both!

 

[60toyetero]

2.8 C!! DROOOLLLL on a 70 series!

 

[ozcrusier]

It is a tough choice

 

[Owyhee Jackass]

I agree, it does look like the numbers are in favor of the Cummins. More power, more torque and probably better fuel economy.

What are the criteria for your build? The Toyota engine will be easier to adapt to a Toyota trans/drive-train. 'All mechanical' appeals to me, but the Cummins comes with an ECU and a pedal to mount, so it shouldn't be too complex to set up.

Looks like the 1HZ has A/C, are you adding A/C, or trying to keep A/C in the 70? Will you have to figure out an adapter to add A/C to the Cummins?

Curious, do you know how loud the Cummins is? Do they publish that data? Cummins seem to be louder and not run as smooth as Toyota diesels, but I'm comparing stock Toyotas to bread truck engine conversions.

Good luck, both will be cool, I vote for the Cummins as I'd like to see/hear that in a 70.

 

[joekatana]

I looked at the Profits build with the 2.8 Cummins at Sema and I like it, that being said as long as we have a supply of 1HZ’s and 1HDT’s to use I would go for the Toyota engines to keep it in the family and we know these are proven to be reliable engines.All the newer US diesels in the past 15 years have shown us that not all are as reliable so I definitely want to wait a few years to install a 2.8 and see how good they are in the first 200k miles or you could loose your return investment if they turn out to be as reliable as a Ford 6.0 or 6.4 to name one

 

[OGBeno]

Why is this even a question?

 

[Tennessee Jed]

1HZ. Put the Cummins in a 4 door Jeep Rubicon.

 

[Eco 45]

Two projects, two engines. You're good-use'em both!

The problem is I have a few of each engine so not cut and dry!

Why is this even a question?

When are you going to start selling Cummins Parts?


The 2.8 Cummins is nothing like the 4BT of the past. It is a very quiet engine for being a diesel and very responsive to the electronic throttle. A/C can be added to a 2.8 Cummins quite easily. Just like all things diesel this engine has been in use around the world for many years so it has a track record already that seems reliable; we are not just getting a taste of what the rest of the world already knows.

 

[JimmyPrado]

I'd love to see the process and the outcome of the Cummins in a 70. Do it!

 

[GTSSportCoupe]

Cummins hands down.

 

[OGBeno]

When are you going to start selling Cummins Parts?

When hell freezes over.

 

[clintnz]

Depends on what 70 they are going in too - LJ/KZj series have a shorter engine bay that suits a 4cyl mill better (or a V8 ) If I was using a 1HZ I'd be adding a turbo, A very experienced local diesel/4wd mechanic/tuner was telling me recently that he'd take a turbo 1HZ over a 1HDT.

Cheers
Clint

 

[jfrench]

Further info on the "unique projects" and if it's a four door 70 series I'll tell you which one I want in my future cruiser

 

[GreaseMonkeyJP]

Both engines deserve a home, that being said I would be interested in seeing the Cummins in a LJ, just to see if it would fit.

 

[roscoFJ73]

Take the engine that will be easy and cheap to get parts for and for US owners that will be the 2.8 .
But if I was going into remote areas regularly, it would be the 1HZ all the way.

 

[Eco 45]

When hell freezes over.

You might find yourself shipping ice to hell once you go for a test drive!

 

[Bodiedog]

So what did you decide? I would like to know how the engine performed. I have an overland '96 Landcruiser with a stock engine. Have been considering either a turbo or converting to turbo diesel. The passes in Colorado are rough with the stock motor. Wonder if the rig is too heavy for the Cummins R2.8? Curious about peoples opinions. Thanks!

 

[roscoFJ73]

Try a search , there are mulitple threads on this engine, but no one seems to have installed one yet