5L into a LJ78

This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.

M

Mwanza Mud

10 Year 15 Year
Joined
Jan 26, 2007
Threads
3
Messages
19
Been trying to find more information on the toyota 5L engine which, I've been told, does not receive turbos well due to it's "high-compression cylinders."
:hhmm:
That's a direct quote from a guy whose quote-worthiness I question, mainly b/c it seems like a vague statement: I mean, the cylinders themselves, the pistons, the...what exactly is the meaning there? Anybody have much experience with these engines or know someone they can question a little? I'm counting on you guys in Oz and those of you in Africa especially.

For non-tarmac performance the change is huge over the 2LTE and therefore most (nearly all) of my general usage, plus the added bonus of a completely mechanical setup for ease of upkeep. I would rate performance as vastly better than the 2LTE...more than the numbers would indicate.

The only fact that may lend credence to the statement about the "cylinders" seems to be the fact that I don't know that Toyota ever added a Turbo to it. Even more, when they designed their first 3.0 L turbo...they went to the KZ. So, whaddya all think?

Thanks all,
Jason
 
LOL!!
there have been turbos added to "high compression" diesels for decades. talk to someone that actually knows what he is talking about...
there is a 13BT swap in progress in Alaske as we speak so the engine wieght issue should be resolved shortly.
you will need to change out the engine and tranny of course.
the performance can not be much worse than the 2LTE, that thing is such a dog on a good day.
<Roverboy should be chimming in shortly>
 
crushers said:
LOL!!
there is a 13BT swap in progress in Alaske as we speak so the engine wieght issue should be resolved shortly.
Click to expand...

Really...that's great...is there a thread??


Also, I knew the guy had to be blowing smoke. Anyway, probably wait a while before fitting a turbo...money honey.

Jason
 
Mwanza Mud said:
Been trying to find more information on the toyota 5L engine which, I've been told, does not receive turbos well due to it's "high-compression cylinders."
:hhmm:
That's a direct quote from a guy whose quote-worthiness I question, mainly b/c it seems like a vague statement: I mean, the cylinders themselves, the pistons, the...what exactly is the meaning there? Anybody have much experience with these engines or know someone they can question a little? I'm counting on you guys in Oz and those of you in Africa especially.

For non-tarmac performance the change is huge over the 2LTE and therefore most (nearly all) of my general usage, plus the added bonus of a completely mechanical setup for ease of upkeep. I would rate performance as vastly better than the 2LTE...more than the numbers would indicate.

The only fact that may lend credence to the statement about the "cylinders" seems to be the fact that I don't know that Toyota ever added a Turbo to it. Even more, when they designed their first 3.0 L turbo...they went to the KZ. So, whaddya all think?

Thanks all,
Jason
Click to expand...

Generally factory turbos have a lower compression ratio,say 16:1, as opposed to their non turbo cousins 22:1.
So if you want to run an aftermarket turbo ,you would be wise not to turn it up too much and watch the EGTs a bit more religeously.
Factory turbos also use thicker pistons and may have oil skirt cooling and direct injection.

Aussie owners I have spoken to and read about report mixed succes with the 5L turboed.
There are threads on 4WDAction and Outer Limits forums regarding this subject
I guess you really need to know how they are driven to get an accurate assessment.

Toyota had nothing but headaches turboing the L engines so they probably gave up. Toyota Australia never sold a single one and I suspect they knew it would be a problem in hot isolated areas
 
Last edited:
Toyota never sold the 2LT and the 2LTE in Oz? did i read this correct?

the NA 3B also has piston cooling oil nozzles as you know.

i never tore into a 12HT, did it have the oil nozzles? (of course i could look this up in the EPC but i am being lazy)
 
coldtaco said:
Are you talking about me Wayne? It's a 1HD-FT that is going into the 78:grinpimp:
Click to expand...

Even if it is a 1HD-FT, that's really exciting. How you getting around the cramped engine space...where you putting the radiator...you leaving the drive train or going into some work there as well...is there gonna be a thread?

That's great that you're doing it...I know a bunch of people will be excited to see your results and even more probably your process.

Cheers
 
no way!!
i thought it was the 13BT out of your 70... my bad.
that is going to be kicking! 1HDT with 4.9 gears and what for tires? 48s?
 
crushers said:
Toyota never sold the 2LT and the 2LTE in Oz? did i read this correct?
Click to expand...

The Bundeera's were mainly RJ70s . I cant recall seeing any 2LT or 2LTEs except for those brought in under the 15 year rule.
I think a 2LT powered 70 is a LJ71 and all the domestic models are LJ70
 
Well, I was/am planning on a thread once I got done, or close and had time to organize and such pictures and such, but here is a quick run down:
Take one LJ-78 and do the following;
1HD-FT w/ 80 series 5 speed and transfer case
rt. hand drive swap to left hand drive
BJ-70 front clip on the LJ-78 for room and looks better:cool:
Don't know what to do with the axles as I do want to use my full floater axles for the front and rear, but do I leaf spring em or LJ-78 coil spring em or custom 3/4 link set-ups? I just bought all new leaf springs last October and there is no way I will get my money back on those if I was to sell them. I would need heavier duty front coils if stay with the 78 set up.
By the way, I still have my 13B-T and H55F for sale.
 
Stephan,
don't take a step back, stick with the coils... use 80 series front if need be. that truck has the lift in it already so maybe just try it out and see what you think.
agreed on the front clip, the squarer front on the 70 series looks tough, what did you do for the front fender mounts? modify the frame or the sheet metal?

i look forward to the thread.
 
when i was researching this front clip swap, using the frame dimensions that made the most sense to me as well...
 
You must log in or register to reply here.

Share this page

Back
Top Bottom