Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL) https://baustralianxtrail.runboard.com/t127451 Runboard| Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL) en-us Fri, 29 Mar 2024 14:15:03 +0000 Fri, 29 Mar 2024 14:15:03 +0000 https://www.runboard.com/ rssfeeds_managingeditor@runboard.com (Runboard.com RSS feeds managing editor) rssfeeds_webmaster@runboard.com (Runboard.com RSS feeds webmaster) akBBS 60 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2032509,from=rss#post2032509https://baustralianxtrail.runboard.com/p2032509,from=rss#post2032509quote: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).......nondisclosed_email@example.com (gu4500)Sun, 23 Aug 2009 19:47:59 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2032037,from=rss#post2032037https://baustralianxtrail.runboard.com/p2032037,from=rss#post2032037Hi Guys, Am gonna start a new thread after seeing the results of today's dyno 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. nondisclosed_email@example.com (jalalski)Thu, 13 Aug 2009 16:46:38 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2032008,from=rss#post2032008https://baustralianxtrail.runboard.com/p2032008,from=rss#post2032008good 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!nondisclosed_email@example.com (dronus)Wed, 12 Aug 2009 21:01:40 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2032004,from=rss#post2032004https://baustralianxtrail.runboard.com/p2032004,from=rss#post2032004Hi 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 nondisclosed_email@example.com (jalalski)Wed, 12 Aug 2009 20:11:58 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031997,from=rss#post2031997https://baustralianxtrail.runboard.com/p2031997,from=rss#post2031997I would be very interested too Alan, good pointnondisclosed_email@example.com (dronus)Wed, 12 Aug 2009 18:10:36 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031992,from=rss#post2031992https://baustralianxtrail.runboard.com/p2031992,from=rss#post2031992I wonder how the auto would go with the extra power given the standard diesel is detuned in the auto version???nondisclosed_email@example.com (rescue1)Wed, 12 Aug 2009 17:17:39 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031991,from=rss#post2031991https://baustralianxtrail.runboard.com/p2031991,from=rss#post2031991Just got back from Bathurst - the twins definately make a difference in power going up and down the hills. I reset my fuel usage meter when i left hitech and when i pulled in the driveway it is showing 5.7l/100km. I was doing the speed limit most of the way, lots of road works through there so there was a good mix of traffic conditions and speeds. Im impressed. nondisclosed_email@example.com (dronus)Wed, 12 Aug 2009 17:07:15 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031984,from=rss#post2031984https://baustralianxtrail.runboard.com/p2031984,from=rss#post2031984This morning we fit the single pipe and i took it for a run around Bathurst. Seeing that yesterday it was raining and i was tired i thought id give myself a second opinion. Well, I wasnt disappointed. The power increase feels noticable, especially off the lights where you normally get that little lag. The single pipe has been made with the "drooper" tip which sits just inline with the rear bumper, making it not really noticable from behind which is good. The twins are just being finished off on the jig now and we should have them fitted shortly. Jalalski has taken a heap of pictures. Tommorow we are off to the dyno again to see what difference it has made.nondisclosed_email@example.com (dronus)Wed, 12 Aug 2009 11:56:07 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031945,from=rss#post2031945https://baustralianxtrail.runboard.com/p2031945,from=rss#post2031945quote:hiimkam wrote: Jalal/dronus, Have any thoughts bin put into a turbo back system? or just the cat back? or was that what you were talking about with the O2 sensors such? cos id imagine theyd (unfortunately) be in the dump pipe... Yes mate, not possible without major mods and without impacting the ECU/sensors. After testing driving it for the second time with the twins, I really look forward to the dyno results. That thing spins the wheels in 2nd gear and just shoots off like a rocket nondisclosed_email@example.com (jalalski)Tue, 11 Aug 2009 15:10:32 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031942,from=rss#post2031942https://baustralianxtrail.runboard.com/p2031942,from=rss#post2031942Kev, 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. back on topic, with the T31 diesel, id strongly suggest an upgraded dump pipe. Jalal/dronus, Have any thoughts bin put into a turbo back system? or just the cat back? or was that what you were talking about with the O2 sensors such? cos id imagine theyd (unfortunately) be in the dump pipe...nondisclosed_email@example.com (hiimkam)Tue, 11 Aug 2009 14:10:14 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031937,from=rss#post2031937https://baustralianxtrail.runboard.com/p2031937,from=rss#post2031937I am reporting from the cold workshop floor, not like Jalal who is in the warm office, hahaha Just Kidding. The first run that we did with the single resonator was impressive. We actually think it was quieter! The turbo seems to spin up quicker as well, and the low down torque is noticeable. The Twin is being fit now and ill take it for another spin and report back too. The original catback is quite heavy and bulky. It was an early start and we got here just before the rain, which was a bonus. Sussed out the Glenbrook info centre too, ill post that in the other thread. Time for another coffee i think.nondisclosed_email@example.com (dronus)Tue, 11 Aug 2009 12:00:25 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031936,from=rss#post2031936https://baustralianxtrail.runboard.com/p2031936,from=rss#post2031936Hi Guys, Reporting from the Hi-Tech factory in Bathurst. The T31 diesel cat. back system is coming along perfectly fine. I can report at this stage that the cat. back system for the diesel T31 will be available in 2 options (straight throufg system and twins) Stay tuned for more updates. P.S. We got here at 7am and had a perfect run with our xtrails. (T30 and T31) nondisclosed_email@example.com (jalalski)Tue, 11 Aug 2009 11:49:51 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031932,from=rss#post2031932https://baustralianxtrail.runboard.com/p2031932,from=rss#post2031932Hi Cam, The turbo in the diesel is a variable vane type. Not sure if the same manual turbo boost adjustments are still able to be done.nondisclosed_email@example.com (Revhead Kev)Tue, 11 Aug 2009 09:59:49 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031923,from=rss#post2031923https://baustralianxtrail.runboard.com/p2031923,from=rss#post2031923a little off topic, but has anyone considered raising the turbos boost pressure? a simple manual boost controller will do the trick, and would provide big gains with an upgraded exhaust... of course you'd need a tune too... not sure of the stock engine's boost level, but id guess is about almost 10psi if it spins out 127kw in diesel form... nondisclosed_email@example.com (hiimkam)Mon, 10 Aug 2009 23:59:49 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031847,from=rss#post2031847https://baustralianxtrail.runboard.com/p2031847,from=rss#post2031847Hi Stephen, The wheel to flywheel power and torque ratios are explained a bit in THIS thread. Basically when it means is that the quoted figures by Nissan are at the flywheel power and there is usually a loss of approx. 40% in the drive-train of a vehicle when this power is transferred to the wheels (i.e. transmission associated loss...etc). What we have experienced with the T31 diesel after doing the dyno on a stock standard car suggests that there is minimal loss of power due to transmission and drive-train losses and the "at the wheels" power is almost identical to the flywheel power, which is a great thing to have in any car.nondisclosed_email@example.com (jalalski)Sun, 09 Aug 2009 16:28:04 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031838,from=rss#post2031838https://baustralianxtrail.runboard.com/p2031838,from=rss#post2031838quote:jalalski wrote: ... when Lambros suggested that we only do a straight through muffler upgrade for the T31 with twin outlets on one side and I didn't like this suggestion and insisted we do the twins set-up just like the T30 I couldn't agree more with you, Jalal. I think the only way is to have twin exhaust pipes Looks are everything!! Pardon my ignorance, but what do you mean we you said quote: Jalalski wrote: "Now to the most important piece of information which just shocked me!!! As we know, the T31 diesel (manual transmission) factory (flywheel) figures are as follows: 127KW @ 3,750RPM 360Nm @ 2,000RPM The T31 Diesel X-Trail (at the wheels) figures are: 114.3KW @ 3,768RPM 329Nm @ 2,522RPM This means that the T31 diesel drive-train is so efficient that there is almost no loss of power and torque as a result, which is awesome news indeed and I can only imagine what the cat. back system will produce when fitted to this T31 Could you (or anyone else) explain the difference in layman's terms?   nondisclosed_email@example.com (loafer)Sun, 09 Aug 2009 13:52:40 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031811,from=rss#post2031811https://baustralianxtrail.runboard.com/p2031811,from=rss#post2031811Yep i agree and i out my 2c in that i dont want a loud exhaust as it would just annoy me. Nice for it to have a little grumble but quiet is better especially when cruising on the highway! Not long to go now nondisclosed_email@example.com (dronus)Sun, 09 Aug 2009 00:21:12 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031803,from=rss#post2031803https://baustralianxtrail.runboard.com/p2031803,from=rss#post2031803Don't worry Tony. Lambros did that pretty well with the T30 system so I think Andrew's should sound just as nice nondisclosed_email@example.com (Revhead Kev)Sat, 08 Aug 2009 20:28:22 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031799,from=rss#post2031799https://baustralianxtrail.runboard.com/p2031799,from=rss#post2031799Not much of a doof doof person myself but still would like a little note just so you know that something is lurking.nondisclosed_email@example.com (cooch t31)Sat, 08 Aug 2009 19:59:26 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031798,from=rss#post2031798https://baustralianxtrail.runboard.com/p2031798,from=rss#post2031798Nah mate, once you go under the exy you will find out that there isn't much room for the 2 pipes to come out from the muffler and sit perfectly under the bumper. Just wait and see the final results, which I must say will NOT be a noisy exhaust system at all, as Lambros and I are simply against such doof doof systems.nondisclosed_email@example.com (jalalski)Sat, 08 Aug 2009 19:46:56 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031796,from=rss#post2031796https://baustralianxtrail.runboard.com/p2031796,from=rss#post2031796quote:jalalski wrote: And where would you mount the muffler Tony? I don't know, maybe a couple of doggys, that would give it a nice note. Or even better still, a one in and two out muffler.nondisclosed_email@example.com (cooch t31)Sat, 08 Aug 2009 19:42:04 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031775,from=rss#post2031775https://baustralianxtrail.runboard.com/p2031775,from=rss#post2031775Plenty of room in the glovebox... nondisclosed_email@example.com (dronus)Sat, 08 Aug 2009 14:17:15 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031768,from=rss#post2031768https://baustralianxtrail.runboard.com/p2031768,from=rss#post2031768And where would you mount the muffler Tony?nondisclosed_email@example.com (jalalski)Sat, 08 Aug 2009 12:49:13 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031758,from=rss#post2031758https://baustralianxtrail.runboard.com/p2031758,from=rss#post2031758quote:jalalski wrote:  It's not possible to position 2 outlets side by side (i.e. quad outlet set-up like BMW X5) on the T31 due to no room on the right side where the recovery hook is. I wasn't talking about having a quad system. Just 2 pipes running along side each other coming out at the same place where the original is. Still having twin pipes, but both on the same side of the Xy. nondisclosed_email@example.com (cooch t31)Sat, 08 Aug 2009 10:12:56 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031756,from=rss#post2031756https://baustralianxtrail.runboard.com/p2031756,from=rss#post2031756quote:jalalski wrote: You just have to keep Lambros occupied when they weld them in so he doesn't kill me ROFL! nondisclosed_email@example.com (dronus)Sat, 08 Aug 2009 09:33:19 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031755,from=rss#post2031755https://baustralianxtrail.runboard.com/p2031755,from=rss#post2031755Yeah, am sure there are nicer muffler tips on the market, especially the square AMG (Mercedes) ones that I saw at Hi-Tech, but these are pretty expensive and would have to be imported and Lambros prefers to use the ones he manufactures at Bathurst that are readily available. Am sure T31 owners would be able to change those tips to anything they like down the track and get any muffler shop to weld them in. That is what I have done with mine anyway and Lambros nearly killed me for it LOL But don't worry Andrew, the guys at Bathurst will have a greater selection at the factory and I'll find something there for you. I always do LOL You just have to keep Lambros occupied when they weld them in so he doesn't kill me nondisclosed_email@example.com (jalalski)Sat, 08 Aug 2009 09:27:40 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031754,from=rss#post2031754https://baustralianxtrail.runboard.com/p2031754,from=rss#post2031754Mmmm quad pipes.... We did also see some tail pipes that were more square that matched the square, rugged looks of the exy. They looked pretty cool, but Jalal will probably still have sore hands from when Lambros kept slapping him every time he picked something up and putting it under the car Did you get any pics of those ones Jalal? The tail pipes do look good, i was concerned at first that it would look too much like a captiva rear end but it didnt nondisclosed_email@example.com (dronus)Sat, 08 Aug 2009 09:20:09 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031753,from=rss#post2031753https://baustralianxtrail.runboard.com/p2031753,from=rss#post2031753That's what will happen Tony, the photo above is just an illustration of where the outlets will sit, the main pipe will follow the factory one to the same position where the factory muffler is and it will have a smaller sports muffler sitting there, from it another pipe will branch out in front of the rear diff (behind the spare wheel well) to go to the right side outlet. It's not possible to position 2 outlets side by side (i.e. quad outlet set-up like BMW X5) on the T31 due to no room on the right side where the recovery hook is. We also thought of putting 2 mufflers (one on each side), but again it wasn't possible due to the recovery hook and will introduce more restrictions. By the way, Andrew has a huge dent in his factory muffler, so this proves that despite Nissan's attempt to position the muffler as high as possible on the T31, it is still low and exposed to damage.nondisclosed_email@example.com (jalalski)Sat, 08 Aug 2009 08:30:47 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031748,from=rss#post2031748https://baustralianxtrail.runboard.com/p2031748,from=rss#post2031748What I meant was where the original muffler and exhaust is, that you would have 2 pipes with 2 outlets running along side each other joining behind the rear diff. Twin pipes running along side by side.nondisclosed_email@example.com (cooch t31)Sat, 08 Aug 2009 08:12:43 +0000 Re: Hi-Tech X-Trail Cat. Back System (T31 X-TRAIL)https://baustralianxtrail.runboard.com/p2031747,from=rss#post2031747https://baustralianxtrail.runboard.com/p2031747,from=rss#post2031747Don't worry guys, I have already mentioned this to Andrew yesterday and told him that I will bring my exy to have it dynoed in that place to compare the results. My exy was previously tuned at AutoTech with 19" rims, so am sure there would have been a bit of a loss there due to the size of the wheels which this dyno method will eliminate. Now that we gonna use this dyno for the "after" results when we fit the cat back system to Andrew's T31 diesel exy, am sure we will get consistent results which will clearly show us the gains. Jim from the dyno place was certainly impressed with the T31 and said that the gearbox is awesome to produce such a torque without any modifications on the diesel. He also mentioned that after fitting the cat. back system there is more potential in this diesel with fitting a diesel chip made in Germany to give even more power (more on that in a different thread) Tony, what do you mean by "side by side set-up" ? This is the only possible set-up of the exhaust system on the T31 without cutting the recovery hook, which I believe is important as it is bolted on as well as spot welded, so it is indeed rated and pretty strong. Am sure most T31 owners would rather keep this recovery hook rather than loose it.nondisclosed_email@example.com (jalalski)Sat, 08 Aug 2009 08:08:15 +0000