12ht or 4bt or 6bt conversion

[rideglobally]

Originally Posted by Wayneraintree

Hey, so what did you decide? The Duramax suggestion was really a joke (though it would be sweet).. I suspect it would be overly complicated IMHO. If you really wanted to put a diesel in there that would serve you well with that amount of weight: I would heavily consider a 12 valve Cummins with manual tranny... but there are compication with that as well, i.e. engine wieght, the manual tranny is kinda rough shifting (NV4500) some would say.
But, it can be done:

Cummins 6AT 3.4 in Toyota FJ55 - Cummins 4BT Forums

CIS Auto Web's Diesel Land Cruisers

same swap, just more pics....

i am almost decided on a 12ht with an inter cooler, with an inter cooler i maybe able to increase the boost power a bit in case i need it (any ideas on this?) and 5 speed transmission. one of the major draw is the easy bolt on to my cruiser. i am still trying to figure out how much modification on a 1hz or a 1hdt. i am also looking into lowering the weight of my cruiser...thanks

[roscoFJ73]

Originally Posted by rideglobally

i am almost decided on a 12ht with an inter cooler, with an inter cooler i maybe able to increase the boost power a bit in case i need it (any ideas on this?) and 5 speed transmission. one of the major draw is the easy bolt on to my cruiser. i am still trying to figure out how much modification on a 1hz or a 1hdt. i am also looking into lowering the weight of my cruiser...thanks

The 12HT would be easier and if you could get one at the right price and condition,thatS the way to go.
The downside is parts are not so readily available as only a handfull of countries got them and they were only in production for about 5 years.
I dont think you would need a intercooler and it would block off access to the engine.
With what you have regarding the height and weight,a good steady 50-60 mph is the best you can hope for on a very good road.
If you going to countries with not much infrastructure 30-40mph might be the best you can hope for.

The 1HZ would need new frame bracket welded on for the engine mounts. A gearbox with 21 splines..
You would need a new tacho.An aftermarket set up would be better
I think your oil pressure and temp gauge are a plug in.
The exhaust would need some thought as it exits the 1HZ in an awkward spot on a 45.
The PS pump and vac pump are all self contained on the 1HZ
Send a PM to Radd Cruisers. Im sure he put a 1HZ into a 45