Heat-Sink For Wideband....Damn - The Saab Link Forums

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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 09-19-2012, 05:44 PM   #1
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Heat-Sink For Wideband....Damn

So,
304 Stainless Steel oxygen sensor life extension HEAT-SINK 02 BUNG spacer pipe * | eBay
this thing is 12 bucks and seems to suit the job. Innovate's Heat sink extender bung is ~$85. Seems awful steep. Is it worth it? I mean, damn, that's like 80% of what I paid for the whole system! Will the 12 dollar one work or should I just vomit up the 90 bucks for a dinky piece of metal? My current WB has been on the car for ~3k miles, right where the OE sensor was in the high heat/flow conditions. I think (as per other threads on here) that it is succumbing to the torture.
What say you? Anyone have experience frst hand?
Thanks,
-Cm
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Old 09-19-2012, 07:31 PM   #2
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That's more like a spark plug non fouler used to fool the ecu about a functioning rear o2 sensor.

The innovate one actually leaves the sensor in the air stream and protects the sensor element by only exposing a small piece of the sensor.

Does it matter? I'd imagine your reading will be off as the sensor is physically removed from the air stream.

I say option 3, weld in a new bung in the proper location. Should be about the same price, or a little bit cheaper then the heat sink.
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Old 09-19-2012, 08:45 PM   #3
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Not really any good spots to weld the new bung...seeing as I remove it and recalibrate after every 500 miles or so (I pretty much only drive it to tune it, which means hard). Plus, any other bung spot is going to be a pain to get to or gather road crap.
-Cm
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Old 09-19-2012, 09:04 PM   #4
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move the sensor farther from the turbo, end of story. the only reason ive killed a LSU sensor is because i have it layed at a bad angle and it gathers condensation, as well as not giving it time to warm up.



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Old 09-21-2012, 05:44 AM   #5
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As per my calculations, at WOT or heavy load sites, the EGTs will briefly climb over 1k degrees Celsius. This means that once the system has warmed up, the sensor will still be seeing EGT's well over it's 900* FAHRENHEIT rating(about 1k F at CAT). A lot of the ECU project guys get the heatsink FWIW.
So here's how it stands:
1) Buy new sensor. Current one is probably OTWO. Very high EGT/flow!
2) Relocate the bung. Have to get someone to weld it in, and I may not have a long enough wire. $25-100 from what I've been told.
3) OR Buy the heat sink and keep wideband convenient. $80.
Seem's you all, so far, favor welding a different bung.
-Cm
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Old 09-21-2012, 05:45 AM   #6
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Originally Posted by saabkid37 View Post
move the sensor farther from the turbo, end of story. the only reason ive killed a LSU sensor is because i have it layed at a bad angle and it gathers condensation, as well as not giving it time to warm up.
AS for warm up, it says in BIG BOLD PRINT "DO NOT WAIT FOR SENSOR TO HEAT UP PRIOR TO STARTING ENGINE" this is because the engine spits water onto the hot sensor which kills it stat. I did this forever because it meant the ECU went to closed loop faster.
-Cm
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Old 09-21-2012, 07:02 AM   #7
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No I mean warm up as in my commute is so short the sensor doesn't get hot enough to clean itself off and car barely gets to full temp, because I'm always late



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Old 09-21-2012, 01:50 PM   #8
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You do not want to remove your oxygen sensor from the exhaust airflow with the use of an "extender" as it the ECU relies on the input from the sensor to determine air/fuel ratios for proper engine economy/performance.
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