hello.

i ordered a wideband O2 meter; should be coming soon; next week!

i have an rsr downpipe/catdelete and a rear muff delete; other than that, the car is completely stock. i'd like to know if i can use the secondary O2 sensor port in which to mount my wideband O2 sensor (for future tuning of a yet to be installed hks super afr)..... is it too far from the header for an accurate measurement? the secondary O2 port is probably about 5 feet from the end of the header....

typically, under full power boost situations (above 4000 rpm) what air fuel ratio can i expect out of a stock car (no boost controller; no afc or chips)?

i can always just install it in the secondary O2 port and see if the readings come out "correct" for a stock car w/exhaust.

anyone out there installed a wideband in the secondary O2 port?????

thanx
todd

 

The rear O2 sensor is the one most guys remove and put in the WB sensor. It's not too far, there is no such thing. As long as there aren't exhaust leaks, the cooler the better. The sensor heats it's self up anyway.
The stock readings will be in the 10:1 region. (pretty rich). If you are running 93 octane, you can safely lean it out to 11.5:1, (12:1 if you have a datalogger and check to see if the ECU pulls timing).
If you run 91 octane, 11:1 is the safest bet.
Do runs in 3rd gear (4th ok too you just go really fast).
Have a friend help you, don't try to drive and read WB and RPMs.

 

Yes you can. In fact I make a downpipe with cat delete tha gives you a special O2 sensor fitting for the factory sensor to keep CEL light from coming on and a cap to plug the factory one in the exhaust although you can just run the wideband in that one. Very handy and no need to weld or have a CEL.

 

thanx for the info, guys! very much appreciated!

todd