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Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5666
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Re: "Piggy Back" ECU


The Interceptor is not listed as being tested on a Spec-V so do you think it will work easily with the Xtrail or are you a guinea-pig ?

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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27/Jul/2007, 10:39 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: 29094
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Re: "Piggy Back" ECU


Kev,

I have been in contact with the Haltech guys before (about the same time last year) and they were very close to releasing the Interceptor version for the QR25DE engine, so am not sure if they did that already but AutoTech said it's compatible and available.

I also have the option to use the UNICHIP and this is the one I'm leaning towards using at the moment.

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27/Jul/2007, 11:05 pm Link to this post Send Private Message MSN Blog
 
BRETT72 Profile
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X-TRAIL HOLIC
 


Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: "Piggy Back" ECU


 Dollar vs dollar, would the Apexi unit do the trick for us guys with non HiTech systems. A little more power is always nice.

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BRETT72 - X235

28/Jul/2007, 10:00 am Link to this post Send Email PM   Send Private Message MSN
 
bfa Profile
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X-TRAIL NEWBIE
 


Date Registered: 11-2006
TOTAL POSTS: 93
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Re: "Piggy Back" ECU


Jalal,

On the unichip site it states

quote:

It is nearly impossible for the Unichip data to change after the Unichip ECU has been programmed, causing the engine to be detuned. It is possible however for the fuel pressure to drop (if the fuel pump deteriorates) which would cause the engine to run a leaner air fuel ratio than normal.



Have you also considered installing a high flow fuel pump? Or is this going a little too far?

Cheers

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Dan (X 463)

2006 Black Ti-L
28/Jul/2007, 11:22 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: 29094
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Re: "Piggy Back" ECU


quote:

BRETT72 wrote:

 Dollar vs dollar, would the Apexi unit do the trick for us guys with non HiTech systems. A little more power is always nice.



Brett, you first need to establish your existing fuel:air ratio and timing to be able to tell if your exy is running rich or far too rich before doing this mod, chances are that your ECU has already adjusted itself to the optimum setting with just a cat back, K&N filter and iridium plugs, so adding the Apexi won't achieve much gain, if you calculate how much this mod will cost you.

In your case, the calculation will be based on Power Gain Vs. Dollar Value.

Based on your recent FC figures, I don't think your exy is running rich and your settings are all good.

Dan: The statement on the unichip website applies if I decide to do further engine mods, in which case the unichip will need to be re-tuned again and it also applies if I use lesser quality fuel, but I am planning to have my exy dyno tuned based on the 98 octane fuel which I am using, so I don't see a problem with fuel pressure drop happening.



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28/Jul/2007, 11:43 am Link to this post Send Private Message MSN Blog
 
basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: "Piggy Back" ECU


quote:

jalalski wrote:
It will be 110KW at whatever the AUTO mode gives me emoticon This is the way I dynoed my exy before starting from 4WD mode which changed to AUTO and I believe it is not only front wheels.



But isn't it true that the 4WD is progressively reduced after 40kph and completely disengaged after 80kph? That would mean you're only using front wheels to drive after 80 speed is reached...

Last edited by jalalski, 28/Jul/2007, 11:52 am


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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.
28/Jul/2007, 11:49 am Link to this post Send Email PM   Send Private Message MSN Yahoo Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: "Piggy Back" ECU


Rich,

Lets shift this discussion about the dyno mode to an existing thread HERE You have previously raised exactly the same question and we have discussed there and another thread.

I would like to keep this thread for the ECU piggy back only.

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28/Jul/2007, 11:59 am 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: 5666
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Re: "Piggy Back" ECU


What I would like to know is if there is a piggy-back on the market which allows you to switch between two tuning maps, one for power (road) and one for low-end torque (4wd) emoticon

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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28/Jul/2007, 12:26 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: 29094
Reply | QUOTE
Re: "Piggy Back" ECU


Kev,

To do that you will need to buy a wideband O2 sensor and have the application and software on your laptop and re-tune the exy to suit the driving conditions, but am not sure how practical that will be to implement, as your car should be tuned to perform to its best in one condition or the other. I don't think you can have the best of both worlds with this.

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28/Jul/2007, 12:43 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: 5666
Reply | QUOTE
Re: "Piggy Back" ECU


quote:

jalalski wrote:
I think it is a pretty serious power gain which if added to my existing power would give me an overall 147HP (or 110KW) at the wheels!!



Jalal,
My 0-100kph time went from 13sec down to 9.5sec when I added the full exhaust system which was another 25kW ontop of the standard 50kW ATW.

So adding another 25kW with the piggy-back and getting 110kW ATW should give you a 0-100kph time around 6-7sec emoticon

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog
29/Jul/2007, 10:38 pm Link to this post Send Email PM   Send Private Message Blog
 


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