Differences (hp) between japanese and australian Prado 90

[KZJ90 Member Find all posts View Profile Close KZJ90]

What makes the difference to horsepower between japanese and australian version (1KZ-TE)?
Jap-model gives 108 kW, Aussie-model 96 kW. Torque is the same 343 Nm. Am I right?

Is there always been an intercooler in japanese model KZJ90/95?

[KZJ95W Lurker Find all posts View Profile Close KZJ95W]

Re: Differences (hp) between japanese and australian Prado 90

The cylinder heads are the same. However, the injection pumps are different as well as the ECU

[KZJ90 Member Find all posts View Profile Close KZJ90]

Re: Differences (hp) between japanese and australian Prado 90

The cylinder heads are the same. However, the injection pumps are different as well as the ECU

Injection pump is the same than in european model (92 kW), part no. 22100-67070

[fridayman Senior Member Find all posts View Profile Close fridayman]

Re: Differences (hp) between japanese and australian Prado 90

Does anyone know how the ECU's differ i.e. how does the one make more power than another? And can this be replicated by fitting an after-market chip, or will the one always make more power (everything else being equal)?

[KZJ95W Lurker Find all posts View Profile Close KZJ95W]

Re: Differences (hp) between japanese and australian Prado 90

on the JDM prado, the injection pump assembly has part numbers 22100-67070 (1996 - 1999) and 22100-67100 (1999 - 2000).
for 2001, the 1KZ-TE engine was replaced by the 1KD-FTV engine

on the aussie prado, the injection pump assembly has part numbers 22100-67110 and replaced later on by 22100-67120

[KZJ90 Member Find all posts View Profile Close KZJ90]

Re: Differences (hp) between japanese and australian Prado 90

Does anyone know how the ECU's differ i.e. how does the one make more power than another? And can this be replicated by fitting an after-market chip, or will the one always make more power (everything else being equal)?

By fuel amount and injection timing. Chip only cheat fuel amount parameters, it can not adjust timing or other things. So, itīs more sophisticated to do by different ECU which is designed just for this model.

[fridayman Senior Member Find all posts View Profile Close fridayman]

Re: Differences (hp) between japanese and australian Prado 90

Does anyone know how the ECU's differ i.e. how does the one make more power than another? And can this be replicated by fitting an after-market chip, or will the one always make more power (everything else being equal)?

By fuel amount and injection timing. Chip only cheat fuel amount parameters, it can not adjust timing or other things. So, itīs more sophisticated to do by different ECU which is designed just for this model.

I though that something like the Unichip can be custom mapped on a dyno to maximise fuelling and timing (by modifying the sensor signals)? That is what I am hoping to fit on mine.

[KZJ90 Member Find all posts View Profile Close KZJ90]

Re: Differences (hp) between japanese and australian Prado 90

I though that something like the Unichip can be custom mapped on a dyno to maximise fuelling and timing (by modifying the sensor signals)? That is what I am hoping to fit on mine.

I donīt think that this works with Toyota ECUs. These are unpossible to re-map. I think that only fuel amount is what you can adjust by chip = tuning box, at least in non-commonrail-engines.
Maybe here is something useful info for you: http://vtechtuning.co.uk/

[fridayman Senior Member Find all posts View Profile Close fridayman]

Re: Differences (hp) between japanese and australian Prado 90

I though that something like the Unichip can be custom mapped on a dyno to maximise fuelling and timing (by modifying the sensor signals)? That is what I am hoping to fit on mine.

I donīt think that this works with Toyota ECUs. These are unpossible to re-map. I think that only fuel amount is what you can adjust by chip = tuning box, at least in non-commonrail-engines.
Maybe here is something useful info for you: http://vtechtuning.co.uk/

Maybe they just alter the fuelling and the ECU will then adjust the timing to suit whatever the intercepted sensor signals are.

[fridayman Senior Member Find all posts View Profile Close fridayman]

Re: Differences (hp) between japanese and australian Prado 90

I had a Unichip on a KZJ120 and it improved the torque and the fuel consumption by about 20%.

Was that with just the chip, or an exhaust too?

[fridayman Senior Member Find all posts View Profile Close fridayman]

Re: Differences (hp) between japanese and australian Prado 90

I'm looking into a Unichip / 2.5" pipe combo for my 1KZ-TE, but nobody seems to sell the dump pipes here in the UK.

[KZJ90 Member Find all posts View Profile Close KZJ90]

Re: Differences (hp) between japanese and australian Prado 90

I just installed japanese Prado ECU (-97) to my european Land Cruiser 90 (-96). Part numbers are 89661-60510 for Prado, 89661-60540 for euro-model till 12/1997. I assumed that I am getting 20 hp and 48 Nm more power, but... there might be a little more torque at the some point, but if feels pretty much the same than before. I have an intercooler and chip installed before that. Any idea why I didnīt got those extra power? :? Everything electrical and mechanical parts in the engine should be now the same than in Prado. http://img98.imageshack.us/img98/843...101kohtees.png
Yes, there is a one difference. The inlet air temperature sensor is different (because of the mounting method), I have to measure it from my wifeīs Corolla (it uses the same sensor) what it shows.

But is there really 145 hp/343 Nm in early 90-series jap-Prado? Where could I found specs of these (jap-model -96-99)?

[croozza Avid PP Poster! Find all posts View Profile Close croozza]

Re: Differences (hp) between japanese and australian Prado 90

Its not just ECU that you change, you need to do the pump timing, another reason why the Euro Prado has more power than the Aussie version is the fuel itself, Diesel in Australia is of very poor quality compared to Europe and Japan.

[KZJ90 Member Find all posts View Profile Close KZJ90]

Re: Differences (hp) between japanese and australian Prado 90

Its not just ECU that you change, you need to do the pump timing

Any idea how? The pump is identical (the same part number) and the instructions for the pump installation/position is the same. And there is no plug where to measure the timing advance.

I found an other difference: there is 1st gear position switch in Prado, not in my model. But itīs only on-off-type switch which connect the wire from the ECU pin to the earth. Off, when itīs not on 1st gear. So, I think itīs wonīt affect to this.

I measured those inlet temp sensors, they give identical ohms.

What could cause this power loss? It not feel good, like injection timing is too late or some. I have to push the pedal, instead of just touching it... you know the feeling. It goes ok, but the stock ECU feels better and more efficient overall.

[croozza Avid PP Poster! Find all posts View Profile Close croozza]

Re: Differences (hp) between japanese and australian Prado 90

You will most likely need to go to a diesel mechanic, as he will have the gear to do it all, if you ask nicely he may even play around with the pump and clean it all out for you.