hey guys, will the a/f ratio read correct for something like this?
I was wondering since the wideband sensor does not make direct contact with exhaust gas flow.



thanks!

 

heres my experience on this.

i had the wideband tail sniffer and my wideband in the header colector. when i did dyno runs, my wideband in the header collector read .5-.8 points richer then the tail pipe sniffer.

on one run, i saw 11.5 @ collector, and 12.3 @ tail sniffer. i was running test pipe at the time. i only rely on my wideband in the car when at the dyno.

 

tail sniffer seems to read leaner then a sensor in the testpipe reigon -- I personally have seen this too on a few occasions.

 

I never use the tail sniffer for this reason

 

the tailpipe sniffer works fine so long as you dont have any exhaust leaks.

but most cars have some sort of leak.

last time i was on the dyno both the tailpipe sniffer and the wideband in the car were dead nuts the same.

 

ah, sorry guys, this is a test pipe. I forgot to mention.
Since the exhaust gas flow doesnt actually make contact with the wideband sensor, will it read a little leaner?

 

I wouldn't trust it. Relocate your sensor to a portion of the tp that isn't resonated if it has one, or mount it on the header collector.