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Re: o2 sensor location



Place primary O2 Sensor[s] as close to Exh Manifold Flange as practicable or if equipped with tube headers , place in the " transition " where the 4 primaries merge into 1. O2 switching response degrades the farther it's placed from exh heat concentration. HO2s will reach and maintain the heat threshold quicker and promote CL Quicker. HO2s [better].
  Len

At 10:38 AM 12/16/2000 -0800, you wrote:
Hello there.

I have a question, I may of asked this before but I don't think that it ever
got resolved.

next week I'm getting my chevy 350 dual exhaust system striagtened out, I
have a 350 in a 72 jaguar xj6. I'm having an exhaust shop replace the front
pipes with better fitting ones and install a crossover pipe after the
transmission.

it has to be after the transmission becuase due to clearences I don't want
to cook it.

Should I put my heated o2 sensor in the crossover pipe that far back ? or
should I put it in one of the header pipes exiting one of the exhaust
manifolds ?

I have a 3 wire o2 sensor, heated from something or other. I'm worried that
it might not get hot enough that far back, vs reading only one side of the
engine.

thanks, Diane

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