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Vandyman Profile
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Date Registered: 04-2010
TOTAL POSTS: 24
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BHP outputs


Hi all. I've been looking through various sprecs for the XTrail 2.5 engines - they seem to have been de-tuned over the years, probably to do with the dreaed emissions? What I would like to know is what did they do to de-tune them as it must be able to "tune-up" to how they used to be? Your Australian models always had more power than the UK ones and I've seen there is a GT version that has over 200bhp! Any advice would be greatfully received. Cheers, Vandy.

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Vandy.
S/West UK
2.5 Aventura auto T30
12/May/2010, 4:46 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: 28956
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Re: BHP outputs


Hi Vandy,

In Australia we also have 2 versions of the T30 xtrail in terms of power. Those between the years of 2001-2006 had 132KW (177HP) and the models from 2006 to when the new shape T31 came out have been de-tuned to 123KW (165HP) to comply with Euro4 emission standards.

Nissan have added a second catalytic converter under the car to add the restriction in the exhaust system and they have also changed the programming in the ECU accordingly.

You can only re-claim the lost 9KW (12HP) by upgrading the cat. back exhaust system as we have done here. In our test with the full exhaust system replacement, the ECU didn't like the absence of the second cat. converter and the car lost power, so even if you decide to upgrade the full exhaust system and fit a high flow cat. converter, you will still need to keep the second cat. in place for the ECU to work properly.

Changing the ECU or upgrading its program is out of the question, as Nissan have managed to protect their secret very well and so far no one has been able to crack their program to do any changes to the maps contained within it.

Last edited by jalalski, 12/May/2010, 7:11 am


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12/May/2010, 7:11 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: 5267
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Re: BHP outputs


Hi Vandy,

The GT version used the SR20VET engine, a turbo-charged 2.0 ltr. It was mainly sold in Japan and we have seen quite a few in New Zealand also. None were sold in Australia and those few that made it here were special imports.

The other power upgrade we have done here is to replace the full exhaust system, including extractors and a high-flow cat convertor which has added another 25kW (34 HP) to the 2001-2006 models.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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12/May/2010, 10:47 am Link to this post Send Email PM   Send Private Message Blog
 
Vandyman Profile
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Date Registered: 04-2010
TOTAL POSTS: 24
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Re: BHP outputs


Cheers Fellas. Nothing is ever as straight forward as whacking in a Superchip is it? If I've read this right, there's no point changing the exhaust system (coz I've got a 2006) but if I just changed the the massive ugly lump of steel that hangs down like a pregnant suitcase, sorry, the rear box (extractor), would I get any real benefit in doing this, apart from improving the appearance?

Have spent hours now reading through your air intake suggestions and ideas that various guys have come up with. I've just made a very simple small plate that sits on top of the standard air box funnel. held on with the 2 clips to allow the air from the front grille to have a better route in. I noticed though that Kev fitted his plate under the funnel - was this so that the bottom edge stopped any rain from going in? You know what - I've just realised that without a photo you won't have a dickidy doo doo idea of what the hell I'm talking about emoticon

I'll try to get a photo on here and you'll see what I mean. All the best guys, Vandy.

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Vandy.
S/West UK
2.5 Aventura auto T30
13/May/2010, 6:12 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: 28956
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Re: BHP outputs


Your first performance mod should be the exhaaust system.

Cat. Back will give you an added 9KW of power
Full Exhaust (with keeping your 2nd cat. in place) will give you 24KW of power.

Only then you can look at things as cold air intake, because the power increase from a CAI is marginal on its own and won't be noticed.

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Vandyman Profile
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Date Registered: 04-2010
TOTAL POSTS: 24
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Re: BHP outputs


Thanks for the info. Will look at the exhaust systmem and sort something out - cheers.

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Vandy.
S/West UK
2.5 Aventura auto T30
13/May/2010, 7:15 am Link to this post Send Email PM   Send Private Message
 
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5267
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Re: BHP outputs


Hi Vandy,

quote:

Vandyman wrote:
... the massive ugly lump of steel that hangs down like a pregnant suitcase, sorry, the rear box (extractor) ...


That would be the muffler. The extractors are the pipes from the manifold which merge the 4 into a single pipe for the exhaust (standard is 4 - 1 and performance is 4 - 2 - 1)

quote:

Vandyman wrote:I noticed though that Kev fitted his plate under the funnel - was this so that the bottom edge stopped any rain from going in?


Nope. This was just to hold it in place easier by using the plastic clips which hold the intake funnel in place instead of fitting screws. Made it easier to remove for creek crossings so that it did not act as a water scoop emoticon

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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juggernautadsy87 Profile
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Date Registered: 09-2014
TOTAL POSTS: 9
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Re: BHP outputs


Hi jalal

could you post a link to that exhaust system? I seem to be having difficulty finding it..
Also iv seen hurricane headers on ebay has anyone tried those at all? Depending on price im thinking of just buying the headers and fabricating a custom stainless system... ( I made thousands of them when I worked for Genie exhausts.)
 Cheers


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Adam
03 Ti manual
mem no: x- 3869
Bribie island
Queensland
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Charlie250 Profile
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Date Registered: 08-2012
TOTAL POSTS: 193
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Re:


The major problem with the Hurricane extractors is that they don't accommodate the first cat which is a necessity to keep the engine management computer happy.

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X-2634 2012 Series IV TS Man, Kings Springs, Bridgestone D697's, High Tech Exhaust, Turbo Timer, DBA Slotted Rotors, QFM HPX Pads, Tow Bar, Cargo Barrier, UHF, HID Dr Lights, LED Light Bar, K&N Filter, Bonnet Struts, & Premium Tint
29/Oct/2014, 12:36 pm Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28956
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Re: BHP outputs


quote:

juggernautadsy87 wrote:

Hi jalal

could you post a link to that exhaust system? I seem to be having difficulty finding it..



It's ]HERE Adam.

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