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dronus Profile
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X-TRAIL LEGEND
 


Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)


I would be very interested too Alan, good point

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Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
X-966
12/Aug/2009, 6:10 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: 29094
Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)


Hi Guys,

Tomorrow after the dyno, I will be posting a detailed report with many pics and further detailed information about the T31 diesel cat. back system.

I'm happy to hear that Andrew can really feel the difference and that it has improved the fuel consumption as well, which is great, but tomorrow will be the big reveal of how much extra power and torque we managed to get from this system and my guess also is that these gains will be even more for the petrol version and would also help greatly the auto T31 diesel which has been de-tuned by 15KW and which I hope can be regained by fitting this cat. back system, if there is no complicated restrictions at ECU level.

P.S. I had a good run back to Sydney from Bathurst, but the road works are a major PIA.

I had to leave Bathurst earlier than Andrew as I was picking-up a new car for my wife this evening emoticon

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12/Aug/2009, 8:11 pm Link to this post Send Private Message MSN Blog
 
dronus Profile
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X-TRAIL LEGEND
 


Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)


good idea Jalal, merging all these posts into a summary. I took some final photos with your camera just before she came off the hoist.. The guys did a fantastic job and it looks awesome.

Depending on the results of the dyno we might have to keep an eye on the diesel auto power increase as i believe that the reason they were detuned was the engine is too powerful for the torque converter.

Now i must catch up on some sleep!

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Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
X-966
12/Aug/2009, 9:01 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: 29094
Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)


Hi Guys,

Am gonna start a new thread after seeing the results of today's dyno emoticon

Since we have so many T31 models and variances, am gonna create a Hi-Tech thread for each one of them so as not to confuse anyone and give each model owner a chance to relate directly to the T31 they're driving.

It's gonna take a while to compile the very first in Australia (and probably the world) successful design and implementation of the T31 exhaust system for the diesel, so please be patient as all will be revealed shortly. emoticon

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13/Aug/2009, 4:46 pm Link to this post Send Private Message MSN Blog
 
gu4500 Profile
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X-TRAIL ENTHUSIAST
 


Date Registered: 06-2009
Location: NW Taswegia
TOTAL POSTS: 129
Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)


quote:

hiimkam wrote:

Kev, as long as the turbo has an internal wastegate activated by the turbo's own boost pressure, you can put what's called a bleeder in that line. Basically that filters off some of the boost pressure in that line so the turbo actually needs to spool more pressure to open the wastegate.

so at stock well say the wastegate opens at 8psi, if you put a bleeder in that vents off 3psi, the turbo now needs to spool to 11psi to open the wastegate. varialbe vane and variable geometry technology is to do with the compressor side of the charger.



The turbo already puts out some serious boost.... I've seen the scanguage in mine report MAP (manifold abolute pressure) up around 37/38 psi.

Now the standard atmosphere is 14.7 or 14.8psi.... so that is about 23psi boost running through the M9R motor. Equally, in the Mazda 3 MPS I had, it peaked at about 17psi on a performance premium ULP turbo 4 cyl motor, so 23psi boost is pretty good for a factory built motor, I wouldn't be wanting to bleed boost off myself.

Quite a bit wilder than the 11psi boost you are talking about. A mate of mine had a GQ Patrol 4.2 turbo diesel with variable boost, and you could really pick the difference when it bled off at 11psi vs 16psi (switchable via boost controller).... quite a bit older tech, all mechanical, but you could pick it.

Mates of mine have had hot Suby's with turbos, bleed valves etc, but that was on older tech turbos too..... and longevity was an issue for them too, even when based on EJ20 turbos....

And on the dyno issue..... the hub dyno would rock, with the really high torque/hp cars that always used to try and jump off the dyno rollers..... seen that in the past at Brisbane Tunign & Turbo..... get a Supra or Skyline in with serious mods and even when strapped down, it'd be hard to get reliable results once they were getting huge hp figures (esp. when NOS came into it).......

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Ian X-1289(c)
2009 Platinum TL Xtrail - Scanguage2, Mio Moov360 GPS, Fridge, 100AH AGM 2nd battery, cargo barrier.
1998 GU Patrol 4.5 Petrol, lifted locked, barred...... so much there.
23/Aug/2009, 7:47 pm Link to this post Send Email PM   Send Private Message
 



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