#1330, "RE: About WBO2 location for MS system" In response to In response to 0
About the same distance as the factory sensor is a good spot, that's where I have mine and it works great. As for a delay, the velocity of the exhaust gas is usually pretty fast under most conditions, I seriously doubt you'd ever notice a delay unless you have an exhaust system which is hundreds of feet long... Also, if you put it far back in the system it will be cold and may not get hot enough to produce an accurate reading. The oxygen sensors that they have at dynos have beefier heater circuits (like the stock one that goes behind the cat) than ones that are typically less than 2 or 3 feet from the cylinder head. The biggest thing to watch out for in a turbocharged car is that you have to put the sensor in a location where the exhaust gas pressure will be close to atmospheric, so on a bend or right next to the turbine is no good, otherwise it will throw off the reading.
