I am getting ready to install an AEM wideband O2 sensor in my 67 Firebird/LC2 hybrid and I am concerned about sensor placement to keep the sensor from overheating. In the past on GN's I have placed the sensor close to the end of the DP with no sensor overheating problems. My Firebird is pretty tight in that area so I was thinking of putting it where the DP bends to go down which would be right under the heater box on a Buick. The instructions say that on a turbo'ed car the sensor needs to be 36" from the exhaust port and I come up with roughly 31" from the closest port where I would like to put it. Its less than the instructions call for by not by much. Anyone installed one in the similar area and got away with it? I am not opposed to adding a heat sink if that will help. Thanks!
Wideband O2 placement, can I get away with 20" from turbo w/o overheating the sensor?
- Thread starter Steve
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It's hard to say, iirc the bosch sensor does not like temps over 950f. Consider that pre turbo in the stock o2 sensor position many people measure between 1500-1650 degrees. Will it drop 700 degrees in 30 inches or so?
I ran a wideband where the THDP has a bung for an o2 and I believe I overheated it (it started reading funny) so I moved it down to the end of the downpipe. No problems there.
Personally, I would try and mount it down at the end of the dp. All you need is iirc a 18mm nut (double check that) to weld to the pipe (with hole drilled). Use a sparkplug (I think some fords use these big threads) in the nut to keep it from warping while you weld. That's what I did. Works well enough for me. Sorry I couldn't give you a concrete answer on that, just something to consider.
I ran a wideband where the THDP has a bung for an o2 and I believe I overheated it (it started reading funny) so I moved it down to the end of the downpipe. No problems there.
Personally, I would try and mount it down at the end of the dp. All you need is iirc a 18mm nut (double check that) to weld to the pipe (with hole drilled). Use a sparkplug (I think some fords use these big threads) in the nut to keep it from warping while you weld. That's what I did. Works well enough for me. Sorry I couldn't give you a concrete answer on that, just something to consider.
speedskills
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Just put one in about a foot drom the turbo. No issues yet. I was told by a very well known TR enthusiast and mechanic as long as your a foot away or more your fine. He's been running the AEM wideband for years on numerous cars.
Pronto
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I run my O2 in the downpipe under the heater box area. I think it's about 18" away from the turbo. No problems and it's not difficult to get to.
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