jaxx4k Posted February 29, 2012 Share Posted February 29, 2012 Just wondering where do you guys put your sensor? belmouth or further down? are you catted or not? before or after cat? Link to comment Share on other sites More sharing options...
fahr_side Posted February 29, 2012 Share Posted February 29, 2012 Really, the WBO2 kit's manual doesn't tell you this? Sniffing after the cat tells you nothing. Sniffing before the turbo is inaccurate when in boost. Installing the sensor in the lower half of a pipe puts it in contact with condensate which will kill it. This pretty much leaves the section of bellmouth or pipe between the turbo flange and any cats, and the top half of the pipe, meaning anywhere between 270* and 90*, or 9 o'clock and 3 o'clock. I do hope you read the manual before touching any wiring. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
jaxx4k Posted February 29, 2012 Author Share Posted February 29, 2012 yea Really on a catted DP... cause Im planning on going back catted. I now have a catless and is welded bout 10" down from bellmouth. the manual calls for 10-18" away from turbo and if is to close to hotside it will kill the sensor, but from 7" & on the cat is in the way and I don't think reading it after the cat is good for anything.. http://i859.photobucket.com/albums/ab157/graphite_subaru/subaru%20pics/d56fe2f2.jpg Link to comment Share on other sites More sharing options...
Strizzy Posted February 29, 2012 Share Posted February 29, 2012 Mine is in the bellmouth (catless CNT). I'd rather pay the $70 or so to replace the sensor once a year (if that), to have peace of mind and be able to monitor how my built motor is running. My bad luck build Link to comment Share on other sites More sharing options...
fahr_side Posted February 29, 2012 Share Posted February 29, 2012 I now have a catless and is welded bout 10" down from bellmouth. the manual calls for 10-18" away from turbo and if is to close to hotside it will kill the sensor, but from 7" & on the cat is in the way and I don't think reading it after the cat is good for anything.. NSFW hit this particular nail straight on the head. The manufacturers are thinking regular inline-4 installs where the turbo is very close to the exhaust ports rather than our remote location in the next county. On any Subaru but a 5th gen Legacy you go right ahead and weld it in straight after the flange. The exhaust gas is cold enough by that point it won't hurt the sensor. Cause of sensor death for us will be either pig-rich mixture or condensation from bad placement. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
jaxx4k Posted February 29, 2012 Author Share Posted February 29, 2012 You & Strizzy123 do have a point... I do rather pay 70 buxx a yr then keep sucking in fume, i think my lungs are black enough.. lol Link to comment Share on other sites More sharing options...
robitrice Posted February 29, 2012 Share Posted February 29, 2012 mine is mounted similar to the one in the picture but prob 3 or 4 inches further down on a perrin catless DP. Been running for months and no issues at all. Link to comment Share on other sites More sharing options...
Spec B Posted February 29, 2012 Share Posted February 29, 2012 I have mine about 10" downstream of the bellmouth. Link to comment Share on other sites More sharing options...
cryo Posted March 1, 2012 Share Posted March 1, 2012 I have mine about 10" downstream of the bellmouth. [ATTACH]113339[/ATTACH] I mounted mine in the exact same spot as well. Dave [sIGPIC][/sIGPIC] Providing unmatched customer service and a Premium level of Dyno/E-tuning to the Community cryotuneperformance@yahoo.com facebook.com/cryotuneperformance. Link to comment Share on other sites More sharing options...
citka Posted March 1, 2012 Share Posted March 1, 2012 ^^ Same with mine. Link to comment Share on other sites More sharing options...
jaxx4k Posted March 1, 2012 Author Share Posted March 1, 2012 & they are all catted DP? Link to comment Share on other sites More sharing options...
Th3Franz Posted March 1, 2012 Share Posted March 1, 2012 Putting the wideband O2 after a a high-flow cat is not a big deal. The sensor will read slightly richer than the A/F actually is, but it's nothing major. The cat deals with NOx emissions much more than affecting the amount of oxygen in the exhaust stream. I got rid of my rear O2 sensor and put my wideband in its place. -Franz The end of a Legacy http://www.youtube.com/th3franz Link to comment Share on other sites More sharing options...
Spec B Posted March 1, 2012 Share Posted March 1, 2012 & they are all catted DP? Mine is catless.. Link to comment Share on other sites More sharing options...
citka Posted March 1, 2012 Share Posted March 1, 2012 Catless here too. Link to comment Share on other sites More sharing options...
bmx045 Posted March 1, 2012 Share Posted March 1, 2012 http://i1135.photobucket.com/albums/m636/MotiveHero/999.jpg Link to comment Share on other sites More sharing options...
jaxx4k Posted March 1, 2012 Author Share Posted March 1, 2012 any catted guys w/pics? Link to comment Share on other sites More sharing options...
bmx045 Posted March 1, 2012 Share Posted March 1, 2012 cats r gey Link to comment Share on other sites More sharing options...
jaxx4k Posted March 1, 2012 Author Share Posted March 1, 2012 better then fume.... Link to comment Share on other sites More sharing options...
bmx045 Posted March 1, 2012 Share Posted March 1, 2012 nope Link to comment Share on other sites More sharing options...
citka Posted March 2, 2012 Share Posted March 2, 2012 ^^what he said. Link to comment Share on other sites More sharing options...
jaxx4k Posted March 2, 2012 Author Share Posted March 2, 2012 to each their own.... tried and don't like it. Link to comment Share on other sites More sharing options...
Strizzy Posted March 2, 2012 Share Posted March 2, 2012 Mine doesn't smell. My bad luck build Link to comment Share on other sites More sharing options...
mr.hicksta Posted March 4, 2012 Share Posted March 4, 2012 I just installed my Zeitronix wideband system today, and I installed the sensor before the cat where the rear O2 sensor was on my Cobb HFC DP. How much more accurate would it be if installed up top? Link to comment Share on other sites More sharing options...
fahr_side Posted March 4, 2012 Share Posted March 4, 2012 I just installed my Zeitronix wideband system today, and I installed the sensor before the cat where the rear O2 sensor was on my Cobb HFC DP. How much more accurate would it be if installed up top? The distance doesn't affect accuracy per se, a lot of dyno shops will use a sniffer in the tailpipe. There is however more delay between a combustion event and it being measured by the sensor the further away it is from the exhaust ports. For this reason I wouldn't mount so far back if for example I was using it for closed-loop fueling. For logging at typical K-line speeds I wouldn't worry about it too much. Obligatory '[URL="http://legacygt.com/forums/showthread.php/2008-gh8-238668.html?t=238668"]build thread[/URL]' Increased capacity to 2.7 liters, still turbo, but no longer need spark plugs. Link to comment Share on other sites More sharing options...
joeleodee Posted March 4, 2012 Share Posted March 4, 2012 any catted guys w/pics? I've got a shot. What dp are you running. I've got the invidia and because it has a divorced bellmouth, the wbo2 is not centered. Take a look. Been running the original sensor probably close to 2 years and still no problems with erratic readings. http://i108.photobucket.com/albums/n29/joeleodee/IMAG0266.jpg Link to comment Share on other sites More sharing options...
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