07-25-2023, 10:19 AM | #15 | |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,298
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Quote:
I think we can see how this "might" work. OP obviously already has a lot of problems with the post-cat install. is that because of fouling, bad sensor, something else? Given this scenario, I would install a new sensor pre-cat and start over. |
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07-25-2023, 02:52 PM | #16 |
Drives: 2002ss Join Date: Aug 2008
Location: indy
Posts: 65
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It does work he has tuned hundreds of cars this way
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07-25-2023, 03:32 PM | #17 |
Drives: 2002ss Join Date: Aug 2008
Location: indy
Posts: 65
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Hmm I didn’t mention that its a E85 tune! I don’t know if that makes a difference or not but wanted to make it known
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07-26-2023, 08:25 AM | #18 |
Drives: 2020 Camaro SS 1LE Join Date: Apr 2022
Location: Miami
Posts: 227
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You can find out for yourself with a quick google search why you wouldn't want to mount the O2 behind the catalytic converter. NOx is converted to oxygen and nitrogen, therefore you will get a reading of higher oxygen content than you should be. You will have your tune be a little richer than it should be.
"During the first catalyst stage (the reduction catalyst), nitrogen oxides react with a platinum and rhodium coated honeycomb structure. When these harmful nitrogen oxides react with the catalysts (platinum and rhodium), the catalysts remove the nitrogen molecule, hold onto it, and release the oxygen molecules." |
07-26-2023, 08:45 AM | #19 | |
Drives: 22 SS 1LE Join Date: Apr 2022
Location: MD
Posts: 43
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Here's one being installed post cat. Maybe cats are gutted? This is CA though, Not going to pass smog check like that.
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07-26-2023, 09:34 AM | #20 | |
Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016
Location: Ocean City, NJ
Posts: 3,298
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Quote:
OP has problems, but also has full confidence in his tuner. If problems persist, I would suggest opening a new thread in the tuning section of this forum. Perhaps some of our experienced tuners have dealt with the post-cat data problem. |
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07-26-2023, 09:44 AM | #21 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,710
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Did you perform a free air calibration?
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
07-26-2023, 09:57 AM | #22 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 6,953
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I have been running E85 for 5yrs with the same wideband sensor.
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
07-26-2023, 04:26 PM | #23 |
Drives: 2002ss Join Date: Aug 2008
Location: indy
Posts: 65
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No I don’t have problems! I bought a new sensor and it works perfectly! Just like the tuner said!
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07-26-2023, 04:37 PM | #24 |
Drives: 2002ss Join Date: Aug 2008
Location: indy
Posts: 65
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07-26-2023, 04:45 PM | #25 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
Posts: 8,873
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Sensors fail, your did and as you bought another that fixed it you can move on and have fun with your ride. Exactly what I said in my post about my old C7. I have my current 02 between the stock cats. Works perfectly fine.
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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07-26-2023, 04:52 PM | #26 | |
Drives: '20 ZLE Join Date: Jun 2020
Location: Mile High
Posts: 3,815
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Quote:
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'20 ZL1LE A10.
LME 390, E2650, FBO. 1116/967. 15" conversion/Weld/MT ET Street R 325/50R15. 100 octane: 1.35/9.25/151 at 3500 ft. (only one pass so far). 100% meth/100 octane: Alky Twin 10+10 MAF; No dyno or ET. |
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