4JJ1 into an 80 series

Joined
Aug 28, 2019
Messages
30
Location
Adelaide
Hi all,

Most know a 1hdt 80 is $25,000 + in Australia.. a price that is a bit out of touch for me.

Im wondering how crazy it is to find a dead 3FE and convert the engine and transmission etc to the Isuzu 4jj1? My estimated costing being approx 10-15 grand all up with some DIY work.

There is a 250hp/600nm ish npatrol 4jj1 conversion on YouTube... with some modifications of course. Though, the factory patrol gearbox and 4j align rather well which doesn't seem to be the case with the landcruiser unfortunately.

If anyone has investigated this or wishes to add some thoughts to my idea that'd be great!

Cheers
 

Ozark80

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Joined
Aug 20, 2021
Messages
798
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Northwest Arkansas
I would think it'd be cheaper and easier in the long run to find a used 1HDT and swap that in, but I could be wrong. I would try posting on the diesel tech forum as well.
 
Joined
Apr 14, 2016
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1,635
Location
Oregon
Sounds interesting, but does anyone make an adapter for the 4JJ1 to the A440F? Or whatever manual transmission you may have gotten in your market...
 
Joined
Sep 19, 2011
Messages
371
Location
Auckland, New Zealand
Unless you really want diesel, the most sensible swap in Australia is an LS and 4L60e or 80. They're cheap and can be had out of Commodores of which there are literally thousands.
All the adapters are available from Marks in Melbourne. Almost bolt in, though not in a 3FE truck, has to be FZJ or H diesel.
You'd be ahead of those power numbers too - granted its in a different spot in the RPM range.
Doable on that budget.
 
Joined
Aug 28, 2019
Messages
30
Location
Adelaide
Thanks for your responses everyone! I'm located in South Australia. Sourcing a 1hdt engine seems to be around the $9 to 10,000 mark - not including an alternator 😂

My reasoning for the 4JJ1 is based on cheap to purchase, common, reliable and fuel efficiency:

I currently have a FJ73 with the 3F which I had looked into an LS1 for funny enough. My issue is, petrol price is $1.80 per litre here at the moment. (thanks to google value conversions: 3.7L per gallon = $6.66 aud, 4.78 usd.)

My mates in loaded up defenders/pajeros get 13L ish/100km. I'm around the 20L mark in the 3F... I don't know if I could bring myself to go the V8 4wd route as a daily driver as I'm already sitting at a similar fuel consumption (but they do sound good!)

Seems to be only patrol adaptors being manufactured at the moment unfortunately. A Frankenstein iszuzu engine/patrol running gear/80 chassis would be quite the job 😂.

Just a tough time to get into the diesel Toyota market!
 

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