Lot of good info here.
I recommend the bung in a primary tube AND a couple of bungs elsewhere. Like Tom says once you find a primary that "speaks for the whole engine" go with that.
I have had a lot of different O2's on my car (including 2 different brands in the same tube) and really like the Racepak. Having said that, any of these tools should be balanced with what the time slip says and your gut or a second source of info like plugs etc.
To get the average AF with Racepak data link:
1. activate the AF channel
2. select the AF channel in the file/grid box at the top of the graph area.
3. place the cursor on the start point and left click, then push the [ key on the keyboard
4. place the cursor on the end point of the time of interest and left click, then push the ] key on the key board
other help & tips:
http://www.motorsportsinnovations.co...-help-tips.htm
