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blackxtrailgt Profile
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X-TRAIL ENTHUSIAST
 


Date Registered: 12-2005
Location: Northern NSW
TOTAL POSTS: 103
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Re: "Piggy Back" ECU


The X-Trail ECU is what is called OBD2 type ECU. It is an adaptive ECU, designed to alter the 'factory' imprinted base fuel & ignition timing maps to achieve a pre-programmed emmissions standard in the exhaust system, from the exhaust gas oxygen sensor.

I assume you have fitted the extractors, exhaust, good air filter and quality plugs so far?? If so, in my honest opinion, resetting the ECU and driving the car normally for a few hundred kilometres should give you a very close to an ideal state of ECU tune.

Have the car booked in for a dyno tune to test air:fuel ratio, emissions testing and it should come in very close to perfect.

Fitting the Unichip from here would at your own discretion depending on the readings from the dyno. However, the gains would only be in the region of 5 to 10hp and a slight increase in fuel economy. It would be best to speak to your Unichip installer about what can be expected for your $$.



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Nissan X-Trail GT ~ SR20VET, producing 253Kw@wheels on 15psi and living with my uncle(its new owner) on the Sydney North Shore :D

ME?:
Smashed Twin Turbo VY SS Ute work hack
Heavily modified VQ35 powered N14 Pulsar - 350Hp@front wheels
3/Jan/2006, 11:00 pm Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
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Re: "Piggy Back" ECU


Hi Guys,

Last night during the live chat session with many international xtrailers, we have talked about the piggy back ECU's and Valboo (from Canada) who is using the A'PEXi SAFCII piggy back with his xtrail has highly recommended this mod.

Previously I asked my dealer to perform a full diagnostics on my ECU as I told them I felt the exy was running rich, from the print-out they gave me the value for the fuel ratio was set to 11 (factory setting) this value, I was told by Valboo makes the exy run too rich, as the optimal value is 12.3 to 13.0

This in turn explains why we're getting the poor fuel consumption.

Unfortunately the dealers are unable to change this value at all, as the software they have been given by Nissan Australia, only pushes the factory pre-set values through Consult II to the ECU.

The only way to adjust this problem and have the exy run leaner using the above optimal values is through a piggy back ECU.

A'PEXi SAFCII is a well known brand amongst tuners and I think it will be the way to go for many xtrailers doing performance mods.

The piggy back is NOT required for a stock xtrail with no modifications.

I have now approached A'PEXi for pricing and will let you know what happens.

The unit cost is very affordable. (around $400 Canadian)

(Edit) I have now located an Australian A'PEXi dealer in Victoria and made contact with them.

Last edited by jalalski, 27/Mar/2006, 12:10 am


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26/Mar/2006, 9:56 pm Link to this post Send Private Message MSN Blog
 
T30Kid Profile
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X-TRAIL NEWBIE
 


Date Registered: 09-2005
TOTAL POSTS: 96
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Re: "Piggy Back" ECU


As a different option to the "piggy back" is there anyone who makes an "edit" for the QR25, or possibly a tuning house that has the equipment to edit the values within your stock ECU?? I have seen this done on a few vehicles, namely a R31 skyline and plenty of edits on Holdens and Fords.

2cents

27/Mar/2006, 11:07 am Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
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Re: "Piggy Back" ECU


Unfortunately our ECU type is un-touchable and un-crackable. No one has succeeded to crack our ECU as yet or make any sort of software to work with it to change values and maps contained within it emoticon

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27/Mar/2006, 11:52 am Link to this post Send Private Message MSN Blog
 
blackxtrailgt Profile
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Date Registered: 12-2005
Location: Northern NSW
TOTAL POSTS: 103
Reply | QUOTE
Re: "Piggy Back" ECU


From what I hear from my Japanese contacts, the QR20DE ECU can be 'hacked' the same way that the new XR6 Falcon software can be changed. This has already occured on the Nissan 350Z ECU which is based on the QR ECU.

Nissan Australia is unable to modify the software, without a Laptop and the correct windows based software to alter maps but I doubt the would even be willing to change any values(or the dealer risks a warranty claim)

Basically, the coding for the QR engine is slightly different. Not only can fuel/ignition maps be altered but throttle control, knock sensor sensitivity and possibly enable the car to be run on a 4WD dyno properly...

If a workshop in Sydney purchase the equipment/software and could offer the service to 350Z, X-Trail and N16 Pulsars(even the Pathfinder, etc), the initial purchase price could be recouped quickly.
It is something that my brother is currently looking into for his workshop in northern NSW, once it becomes available.

The software, cable and equipment would be from HKS, a reputable Japanese manufacturer.

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Nissan X-Trail GT ~ SR20VET, producing 253Kw@wheels on 15psi and living with my uncle(its new owner) on the Sydney North Shore :D

ME?:
Smashed Twin Turbo VY SS Ute work hack
Heavily modified VQ35 powered N14 Pulsar - 350Hp@front wheels
27/Mar/2006, 2:23 pm Link to this post Send Email PM   Send Private Message
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: "Piggy Back" ECU


Jalal,
 Thought this may be of interest to you guys who are looking at the A'PEXi SAFCII piggy back system.

A'PEXi



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BRETT72 - X235

4/Apr/2006, 6:55 pm Link to this post Send Email PM   Send Private Message MSN
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
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Re: "Piggy Back" ECU


Thanks Brett,

I have found the a'pexi locally in Sydney, but I have decided to shelf this project, as it was confirmed by Valboo (Canada) and others using this piggy back that it will not save on fuel in anyway, so the cost associated with having this mod done, did not justify the end result I was seeking.

It is true however that it will increase power for sure, but for now, I have plenty of that already and I will soon need new brake pads LOL emoticon

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4/Apr/2006, 7:02 pm Link to this post Send Private Message MSN Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
Reply | QUOTE
Re: "Piggy Back" ECU


Hi Guys,

It has been over a year since I said that I have shelved the project of adding a piggy back ECU and it is now time to go a head with this part of the performance modifications for my exy.

Since adding the CAI my exy has been running even richer than before and black carbon deposits in the exhaust tips are getting more noticeable, not to mention the fact that my pocket is now hurting a bit as I am wasting all that good and expensive 98 octane fuel when I sit on higher RPM ranges.

I feel that I am not exploring the full power potential of my performance mods by having the factory (rich) air:fuel setting in place and the MAF sensor is giving the incorrect values to the ECU which in turn is pumping too much fuel.

I have now decided that I am going a head with the Apexi SFAC II piggy back ECU to solve this problem and to gain more power (which I will prove with a dyno run)

I was tossing between the Apexi SAFCII and the Unichip, but since talking to a performance shop in Sydney that does the Unichip, they said they had never connected one to an xtrail, I felt more comfortable with choosing the Apexi as it has been connected to an xtrail and proved VERY successful.

I was just wondering if anyone (Andrew?) can recommend a good performance shop that can fit it for me and dyno tune my exy in Sydney.

The "serious" part of performance tuning has started LOL emoticon

Last edited by jalalski, 21/Jul/2007, 12:24 pm


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21/Jul/2007, 12:23 pm Link to this post Send Private Message MSN Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5406
Reply | QUOTE
Re: "Piggy Back" ECU


What would be the cost of this Jalal ?

Reason I ask is that Jaycar have a Digital Fuel Adjuster kit for $72 (+ a required $54 Hand Programmer/Interface) which allows full air/fuel ratio adjustment over 128 individual load points.
It has been tested in a Nissan 200SX and Maxima.

I know you don't know soldering to build the kit yourself, but it interets me on how the Apexi is fitted and tuned and if there is anymore benefit over a built kit.

Last edited by Revhead Kev, 22/Jul/2007, 9:36 am


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21/Jul/2007, 10:54 pm Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
Reply | QUOTE
Re: "Piggy Back" ECU


quote:

Revhead Kev wrote:

What would be the cost of this Jalal ?



The cost of the Apexi itself is not that expensive, only $300 or so. It is the fitting and tuning that would be around $600 I think.

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22/Jul/2007, 1:18 am Link to this post Send Private Message MSN Blog
 


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