Some people use fuel pressure cutoff switches with their nitrous systems, does anyone use an O2 sensor operated switch to turn off the nitrous if a lean condition is detected? Or does an O2 sensor respond too slowly?

 

Too slow... by the time the 02's react, you've already had the engine out of the car .

 

I agree, a Hobbs switch will prevent the problem and the O2 will tell you your screwed!

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1992 Pontiac Firebird 350/Six Speed
1987 Toyota Pickup 383/500+ HP

 

In short an O2 meter is impratical for what you are trying to do. use the FP sensor & get on with life.

To expand on that some, that depends on the o2 meter. If you are talking about the cheapy $99 O2 meter, it is totaly the wrong tool. this meter is designed for the O2's around Stoch. They are NOT designed nor acurate anywhere else. if this is what you were thinking then I agree with what the other two gents said.

If you are talking about a real WBO2, they are plenty fast. with them you can watch individual cyls firing. the problem is that what if you have one small missfire do you want it to shut off the NOS? prolly not. the other side to this is, do you want to spend the big $ for something that is not going to work very well for this app?, again prolly not. This meter is plenty fast & plenty accurate, but the wrong tool for the job.

if you want to learn more about WBO2 monitoring goto the DIYEFI web site & search the archives. it takes a while but the information is fascinating & plentiful (although burdensome).

My2c on the subject.

BW

 

I'm not trying to do anything and I really don't care, I was just curious.