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jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: T31 Exhaust upgrade


GOOD NEWS!!! Finally emoticon

Well, it's taken more than a while to get Lachlan's T31 Petrol CVT exy dynoed correctly to give us a figure which we can present to you in terms of power gains.

I just got a call from both Hi-Tech and Lachlan saying that the T31 Petrol CVT has gained between 10-12KW at the wheels as a result of fitting the Hi-Tech cat. back system with the most noticeable and peak torque gain was in mid range RPM.

Details and dyno charts will be posted tonight when Lachlan scans them and emails them to me.

HUGE thanks to Lachlan for spending the entire day at AutoTech today to get these results and for his dedication since fitting this system back in November and giving us the needed feedback about it. Much appreciated mate!

P.S. Autotech charged Hi-Tech $220.00 to do this exercise and they had to do 15 RUNS on the dyno to get the CVT to cooperate! Lambros was happy to cover the costs in full to help us get the true figures and identify the gains.

Last edited by jalalski, 22/Mar/2010, 5:34 pm


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22/Mar/2010, 5:27 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: 29094
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Re: T31 Exhaust upgrade


Hi T31 Petrol (Manual) Exy owners,

The cat. back system which was fitted to Lachlan's T31 CVT exy is now available to be fitted to one lucky T31 petrol manual owner in Sydney for the cost of materials only.

Hi-Tech would like to measure the gains of the cat. back system on the T31 Petrol Manual and you get to keep the system.

The system will be fitted to your exy at Darlinghurst and your exy would need to have the "before" and "after"dyno done to get accurate figures of the gains.

If interested, please send me a PM.

P.S. This mod will NOT void your factory warranty!

Last edited by jalalski, 23/Mar/2010, 7:59 pm


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23/Mar/2010, 7:58 pm Link to this post Send Private Message MSN Blog
 
NomadNomad Profile
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Date Registered: 10-2011
TOTAL POSTS: 51
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Re: T31 Exhaust upgrade


Reading this thread from start to finish was like reading a detective novel! emoticon Fantastic emoticon

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T31 SE (european spec)
Diesel 127kW manual
Stock standard
"The advantage of 4WD is that you get further before you get stuck"
8/Nov/2011, 5:58 am Link to this post Send Email PM   Send Private Message Blog
 
AWESIM Profile
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X-TRAIL NEWBIE
 


Date Registered: 01-2012
Location: Moorebank, NSW
TOTAL POSTS: 5
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Re: T31 Exhaust upgrade


I've just installed a CAT back system on my new Exy Ti 2.5 petrol with CVT.
Now i went to two exhaust places hear in Sydney, Liverpool Exhaust (the makers of hurricane headers) and Budget Exhaust (a exhaust performance specialist) both suggested the same.
I ended up going to Budget Exhaust, www.budgetexhaust.net.au/
1. Leave the existing exhaust manifold and the 1st pre Cat in the engine bay.
2. Cut out the 2nd Cat and replace with a high flow CAT.
3. Cut out the rear muffler and replace with sports
4. Both were stainless steel.
5. They did not remove the existing pipe, as it was stainless all ready.
Cost $700 buck GST incl. and work completed within 1hr. emoticon

I don't need convincing on the performance gains of installing a sports exhaust, my purpose for installing the exhaust is for economy, getting exhaust gases out quicker allows the engine to burn the fuel better without the old gases still in the chamber (better fuel economy = more km per tank). However if you do have a lead foot you will accellerate alot faster and burn more fuel, being less effiecent.
I have had sports exhausts on my past 8 new cars over the last 15 years. Plus the sound is great emoticon

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Old Nissan Murano 2007 ST
New Nissan X-Trail 2011Ti
20/Jan/2012, 10:08 am 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: T31 Exhaust upgrade


Well done Glen and it is always good to see someone install an alternative exhaust system to the one being offered here through our forum and the one we all tested first hand and know what it is capable of.

I am not sure if you have done enough research to determine the need to remove the 2nd cat converter and the benefits this will provide to the car performance, fuel consumption and ECU impacts as well.

Based on previous experiences and testing, we found that there is no point in removing the 2nd cat if you gonna leave the primary cat (which is part of the manifold in place) and even more so when the size of the exhaust pipes is not changing.

Performance gains aside (if you are not interested in them), but the exhaust shop which fitted this exhaust system for you could have determined your existing gas flow rate and restrictions and illustrated to you the benefits after fitting the high flow cat converter. This would have been the least I would have asked for apart from being happy with the exhaust note emoticon

If you take the above into consideration and the fact that they have left almost the entire stock system in place, $700 bucks for a high flow cat and a tin at the back is a bit pricey, but it is your choice of course.

You also need to know that when you call your insurance to have the exhaust system added, stay away from mentioning the phrase "sports exhaust", as the insurance companies (most of them anyway) will associate that automatically with the highly modified performance cars. Instead use the term "stainless steel exhaust system to provide more ground clearance for my 4WD" emoticon

Please post some pics of your brand spanking new Ti with the new exhaust system.

P.S. Mine will be staying standard this time LOL emoticon

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20/Jan/2012, 10:37 am Link to this post Send Private Message MSN Blog
 
Charlie250 Profile
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X-TRAIL ENTHUSIAST
 


Date Registered: 08-2012
TOTAL POSTS: 193
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Re: Exhaust upgrade


I'm really looking forward to getting the exhaust done on my new TS Manual.

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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/Aug/2012, 9:51 pm Link to this post Send Email PM   Send Private Message Blog
 
FD032 Profile
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X-TRAIL NEWBIE
 


Date Registered: 10-2012
Location: Fremantle
TOTAL POSTS: 8
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posticon Re: T31 Exhaust upgrade


Took my new X-trail to an appointment in Mandurah (1 hour drive) after getting my new exhaust fitted, here are the fuel usage readings.

Before 8.6L/100km @ 100km/h and 9.6L/100km @110km/h
After 7.1lt/100km @ 100km/h and 8.1L/100km @110km/h (-1.5/100km on both)

Cat back replacement, 2 1/2 inch pipe from cat to new resonator unit (replacing 1st muffler) then 2 1/4 inch from resonator to new high flow exhaust manifold.

Has a slight note and runs great, no dyno test.

So happy, absolutely unbelievable result, about 16% fuel savings at both speeds.

$380 fitted (mild steel) by local Muffler and Brake Centre.

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Silver 2011 CVT Petrol
26/Oct/2012, 7:50 am 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:


Not sure I want to replace the factory muffler which is stainless steel with a mild steel system which is prone to rust and I have never measured the effectiveness of an exhaust system and expected it to reduce fuel economy, so your analogy here is a strange one.

If you're claiming more power as a result of this system then it's only natural for the fuel economy to either stay the same or go up slightly, but I have never seen an exhaust system replacement be used for added fuel economy, so your results are subjective am afraid and could be attributed to many things (example, driving style; road conditions, etc)

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26/Oct/2012, 8:02 am Link to this post Send Private Message MSN Blog
 
DogTrail Profile
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X-TRAIL FANATIC
 


Date Registered: 05-2012
Location: Sunshine Coast
TOTAL POSTS: 481
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Re: Re:


It is possible that FD032 is giving the figures for instant fuel consumption at given speeds from the "economy gauge" which (as far as I can see) is actually a graduated vacuum gauge.

As the back-pressure has probably been reduced with the new exhaust, then everything else in the engine management system changes.

So the economy gauge may show different levels, but the acid test of real fuel consumption will be at the measured volume of fuel at subsequent refills when compared to kilometers driven.

If the exhaust improvement has added to the fuel efficiency as well as power, it will show up there.

If it has only given more 'on-demand' power, then the fuel efficiency may go backwards as that extra power is used to provide more fun.

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2011/12 Australia:- 2.5 litre petrol 4WD, Series IV ST, CVT with Nissan bonnet & headlight protectors, mats + after-market HD towbar with added step for old dogs. ;) Garmin GPS, K&N air filter, DashMate, Black Pearl Tint , Dirt. X-2429(c).
26/Oct/2012, 7:59 pm Link to this post Send Email PM   Send Private Message
 
cooch t31 Profile
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X-TRAIL HOLIC
 


Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re:


Thats a great price even if it is mild steel, will still last you as long as you have the car at least.


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Tony X-891c

HERE is my D22 Navara
HERE is my old 2008 T31, ST Series1

27/Oct/2012, 6:08 am Link to this post Send Private Message
 


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