There are portable units, as Jim notes. Some you can monitor using a cell phone, so you don't need to install a gauge in the dash. Here is an older article that gives some overview. https://www.hagerty.com/media/maintenance-and-tech/monitoring-the-air-fuel-mixture-with-uego-sensor/ "How To Properly Place and Install an O2 Sensor" is a video from Holley. https://www.youtube.com/watch?v=lyv0wh3fsLM&pbjreload=101 You can also read the "oxygen sensor installation" section on the Holley EFI instructions. https://documents.holley.com/199r11031r.pdf There are conflicting views as to if you need 2 for a dual exhaust but Holley says no if the sensor is properly installed. Thanks, Gary H. > -------Original Message------- > > Hi Neil, > > I use a portable wide band connected to the tailpipe with an exhaust > clamp from Innovate: > > https://thetuningschool.com/products/innovate-motorsports-exhaust-clamp > > > You can flip it back and forth to validate it / check differences, if > desired when using a single wide band. If you have deep pockets you > can buy one with two inputs and two probes. > > Jim > > Sent from Jim’s iPhone > > On Saturday, October 3, 2020, 10:02 PM, neal zimmerman > < > wrote: > > > 1)wondering if there are air fuel ratio sensors available. I am not > > talking about a permanent mounted one in your dash but one you could > > use to test different vehicles. . > > 2) Another related question: if it goes up your tailpipe what > > happens when you have dual exhaust? I guess you could sniff both > > tailpipes and ratio should be close from side to side if the carb is > > working ok.?? > > Neal -- > > -- > > -- -- -- -- Please address private email -- email of interest to only one person -- directly to that person. That is, email your parts/car transactions and negotiations, as well as other personal messages, only to the intended recipient. Do not just press "reply" and send your email to everyone using the general '62-'65 Clubhouse public email address. This practice will protect your privacy, reduce the total volume of mail and fine-tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html. -- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. http://groups.google.com/group/1962to1965mopars?hl=en. --- You received this message because you are subscribed to the Google Groups "The 1962 to 1965 Mopar Mail List Clubhouse" group. To unsubscribe from this group and stop receiving emails from it, send an email to 1962to1965mopars+unsubscribe@xxxxxxxxxxxxxxxx. To view this discussion on the web visit https://groups.google.com/d/msgid/1962to1965mopars/20201004142354.6961.qmail%40server309.com.