c5 sts turbo question
Thread Starter
Teching In
Joined: Dec 2009
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c5 sts turbo question hey
i'm in the middle of installing a sts turbo kit on my 02 z06. just wondering where everone else is putting there wide band 02 sensors.
i got an aem wideband and it says it should be 18 inches down stream of the turbo but for those of you that are familiar with an sts system on c5s there is only about 18 inches of tail pipe after the turbo. so are you just putting it before the tail pipe y's or is there another spot for it?
any input is greatly appreciated
thanks
i'm in the middle of installing a sts turbo kit on my 02 z06. just wondering where everone else is putting there wide band 02 sensors.
i got an aem wideband and it says it should be 18 inches down stream of the turbo but for those of you that are familiar with an sts system on c5s there is only about 18 inches of tail pipe after the turbo. so are you just putting it before the tail pipe y's or is there another spot for it?
any input is greatly appreciated
thanks
This may not help you but I run 2 AEM's(one for each bank) on a Camaro inplace of the post o2 snsrs with no cats. They work great with no issues. Not exactly on your optins on a Vet.
There was a thread about a year ago or so discussing this and a few peeps were agreeing with the 18" past the turbo but... my question to them is why take a reading after gases have traveled that far and been re-heated by the heat collected by the turbo???
I would rather take a direct reading around or just a little past the pre-o2 snsrs. Been working for me for years and all the other vehicles I've done STS and other intsalls on.
Plus having a Wideband per bank better helps you diagnose any potential issues you may have per bank. If your lean on B1 and rich on B2 and you take a reading past the y-pipe your reading may look near correct... just my 0.02s! I just had #7 piston break at the ringlands and had a light misfire at idle that would not show up on a scanner(modis or Genisys) But the difference in readings told me which bank I had an issue on!
There was a thread about a year ago or so discussing this and a few peeps were agreeing with the 18" past the turbo but... my question to them is why take a reading after gases have traveled that far and been re-heated by the heat collected by the turbo???
I would rather take a direct reading around or just a little past the pre-o2 snsrs. Been working for me for years and all the other vehicles I've done STS and other intsalls on.
Plus having a Wideband per bank better helps you diagnose any potential issues you may have per bank. If your lean on B1 and rich on B2 and you take a reading past the y-pipe your reading may look near correct... just my 0.02s! I just had #7 piston break at the ringlands and had a light misfire at idle that would not show up on a scanner(modis or Genisys) But the difference in readings told me which bank I had an issue on!
the reason for doing it after the turbo i simple, the presures pre turbo are too extreme and and scew the readings on the wideband.
Plain and simple, the best place for it, is after the turbo. I noticed 1 to 1.5 points different in AFR after moving it back their.
Plain and simple, the best place for it, is after the turbo. I noticed 1 to 1.5 points different in AFR after moving it back their.
When the vehcile was tuned the discrepency in readings between my placement of the WB's and the analyzer they had at the rear pipe were so small we did not worry about it. Not saying that this can be different in another setup but for what I've got it suits me.
But If I decide to go FM I will change my approach.
But If I decide to go FM I will change my approach.
WTF? im not the best with grammar, but damn
my bad, let me fix that.
"the reason for placing the sensor after the turbo is simple,
1. The instructions on most all widebands say to do that.
2. the pressures before the turbo are to great for the sensor to make an accurate reading.
Plain and simple, the best place for it is after the turbo. I personally noticed a 1 to 1.5 point difference in the reading on my wideband when the the sensor was placed pre-turbo vs. post turbo."
is that better. Sorry for the poor grammar and poor spelling, not easy to do with a kid jumping all over you, not to mention doing it from my phone with a little screen makes my thoughts get ahead of my typing very very easy.
EDIT: We also observed that the readings were not as steady pre-turbo, they seemed to jump around alot more. After moving the sensor out back (when i was rear mount) the readings stayed very steady and easier to observe and log.
This was just my personal experience, and also a couple of the other rear mount cars around here that ive been involved with had similar results.
"the reason for placing the sensor after the turbo is simple,
1. The instructions on most all widebands say to do that.
2. the pressures before the turbo are to great for the sensor to make an accurate reading.
Plain and simple, the best place for it is after the turbo. I personally noticed a 1 to 1.5 point difference in the reading on my wideband when the the sensor was placed pre-turbo vs. post turbo."
is that better. Sorry for the poor grammar and poor spelling, not easy to do with a kid jumping all over you, not to mention doing it from my phone with a little screen makes my thoughts get ahead of my typing very very easy.
EDIT: We also observed that the readings were not as steady pre-turbo, they seemed to jump around alot more. After moving the sensor out back (when i was rear mount) the readings stayed very steady and easier to observe and log.
This was just my personal experience, and also a couple of the other rear mount cars around here that ive been involved with had similar results.
Thread Starter
Teching In
Joined: Dec 2009
Posts: 4
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well thanks for the input. i had read the instructions and they clearly said to put in in post turbo, but just figured i'd ask being as someone else out there has to be running a rear mount kit and know what they are talking about.
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Off subject but I've been following your build BTW and nice progress.
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Verdad Gallardo I have not tried actually moving the WBs to post turbo but with seeing readings compared to readings when tuned and when under load on road I have not seen a reason to. Now I may be wrong but everyone has different methods.
Off subject but I've been following your build BTW and nice progress.
Off subject but I've been following your build BTW and nice progress.
It is odd. Ive been part of 4 different Rear mounted turbo builds, one of them being my own car, Only 1 of the four had zero problems with the wide band acting funny pre-turbo.
He was actually the only one who after 5 years, still has it pre-turbo.
