[Shoebox]

Originally Posted by Bored&Stroked

I use them for tuning on a variety of vehicles. Having one in the car is a big help - as you can see how it reacts under different load conditions. One thing to be aware of is WHERE you place the bung is important - usually on the upper-side of a pipe - at a slight angle. Think about a 10 - 11 o'clock or 1 - 2 o'clock position.

Also, it is imperative that you have NO exhaust leaks ahead of the O2 sensor - or you'll have the wrong readings. I usually want them 2 - 3 feet back from the exhaust ports.

On an off topic project I used an Edelbrock Pro Flow FI system and it was then impressed upon me to have NO exhaust leaks and ditto on O2 bung placement. Thanks.