Unichip for the Cruiser

Submitted: Wednesday, Apr 20, 2005 at 21:55
ThreadID: 22247 Views:1950 Replies:4 FollowUps:6
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Looking at putting in a Unichip into the Cruiser (LC100 4.5 Petrol). Find it a little slow after a 260 kw/580 nm V8 in the Rangie ;)

Anyone got any exprience and figures - in particual fuel economy?

/viz
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Reply By: craig - Wednesday, Apr 20, 2005 at 23:43

Wednesday, Apr 20, 2005 at 23:43
I'm interested in this too (LC75 4.5 petrol). Might have some extra gain if the exhaust is changed too. Have a look here http://www.airpowersystems.com.au/unichip/dyno/toyota/100_4_5.htm

Craig
AnswerID: 107621

Follow Up By: viz - Thursday, Apr 21, 2005 at 05:16

Thursday, Apr 21, 2005 at 05:16
Had a look at that - and I know that Graeme Cooper (Newtown, Sydney) fits them to 4WD - $1200.

Want some experiences with the chip from people...

/viz
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Reply By: Nudenut - Thursday, Apr 21, 2005 at 08:54

Thursday, Apr 21, 2005 at 08:54
how do you decipher the charts

kw left
rpm bottom Ok...i can understand that

But when charting rpm to KW ...graphs seem to peak too low?

and what is right side N ...=n/m?... but.... 0-10000 what...
AnswerID: 107641

Follow Up By: viz - Thursday, Apr 21, 2005 at 09:09

Thursday, Apr 21, 2005 at 09:09
Dunno what the right hand scale is - as you say 10,000??? Possible nm x 10 - that would fit into the scale.

Cruiser power does seem a bit peaky - care of I thnk the cam and breathing - though with 4 valves one would expect better breathing. So it would have to be cam...

Don't want power or torque to peak to high for a heavy offroad vehicle - otherwise you and you boat will be climbing up a hill at 180 km/hr or not at all... Like lots of low down grunt (would have preferred the diesel turbo, but this time round can't have everything I want ;)

/viz
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Follow Up By: Nudenut - Thursday, Apr 21, 2005 at 09:28

Thursday, Apr 21, 2005 at 09:28
mm by 10 ..ok i can see that

85kw @ 4100 rpm isnt this too low?

And if you compare the charts agaist an eaton blower on a 4.5 something does not stack up. look only at standard figures...who is right ?

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Follow Up By: viz - Thursday, Apr 21, 2005 at 09:50

Thursday, Apr 21, 2005 at 09:50
Now - see if this works: Nope it don't. Can't paste pictures here??? Oh well...

I think that the Unichip one is more correct - I am familiar with these charts from my Rangie. A rule of thumb for a constant 4WD or AWD, 45% of flywheel power goes to the wheels. Petrol cruiser is what, 165 kw? 45% of that is 74 kw. That fits. If measuring off the rear wheels only (locked centre diff and disconnect the front drive shaft) I would expect another 25 - 30 kw. I would say the Eaton figures are rear wheels only...

/viz

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Follow Up By: old-plodder - Thursday, Apr 21, 2005 at 10:52

Thursday, Apr 21, 2005 at 10:52
I have seen similar figures on 2wd and 4wd engaged on dynos.
Engaging front diff can loose up to 20% of total power due to more ineffeciencies in getting the power to the ground.
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Reply By: viz - Thursday, Apr 21, 2005 at 13:21

Thursday, Apr 21, 2005 at 13:21
Form what I have learnt, and understand, a wheeling front end with no power supplied is the biggest power sucker of them all - hence the free wheeling hubs on some; an AWD is more efficient than a wheeling front, but still is less efficient than free wheeling. In this case the Nissan (and others like it) wins. However I am a big fan of AWD - safety is really enhanced. Recently I had the whole car break away on a straight wet sealed road - all it did was go sideways a couple of feet. In a 2WD I bellieve I would have had a great deal more problems. It appeared to be oil on the road...

/viz
AnswerID: 107668

Reply By: Member - Stan (VIC) - Thursday, Apr 21, 2005 at 13:27

Thursday, Apr 21, 2005 at 13:27
Have a look at this link about performance chips in general:
http://www.lcool.org/technical/elec_diesel_tuning/tuning.html

On the prado I get more power and torque and about the same fuel economy compared before fitting Unichip.

Stan
AnswerID: 107670

Follow Up By: viz - Thursday, Apr 21, 2005 at 16:35

Thursday, Apr 21, 2005 at 16:35
An interesting read. I own a Mercedes Sprinter van, motor is a diesel with common rail injection. Very interesting motor, considering its size (2.2 litre) and output (97 kw). It is a very capable tourer, maybe moreso than the 4.5 litre Landcruiser and weighs empty about 250 kg less...

Thielert in Germany are modifying diesel engines for use in aricraft, 1.7 litre (from the A series Mercedes) producing 99 kw. That is pretty awesome capacity/kw ratio. Wih I could have something like them in the Cruiser - however this would require super-filtration of the fuel for starters. One dose of bad fuel and your wallet will be in a very unhappy state, let me tell you...

Stop me - I'm rambling...! :)

/viz
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