What is the difference between Narrow and Wideband A/F

[Yummy]

I'm looking to get Air Fuel ratio gauge. The Koso site have both. What is the difference?

Also anyone have experience with Koso A/F gauges and sensors?

Much appreciated!

Koso site is http://www.kosonorthamerica.com/index_us.html

 

[rxrider]

The narrowbands are useless in a boosted application as they only measures AFR with accuracy in a narrow band around stoich (14.7 AFR). A wide band O2 measures AFR in a wide band from 9 to 21, the sensors are very sophisticated in how it determines the contents of O2 in the exhaust, there by it can detect O2 levels at a high degree of accuracy over this wide band. A boosted application typically makes its best power around 12.0 AFR.

 

[Yummy]

It does make sense. Thank you. That was the first time I was seeing Narrow type band.

So Wide band it is!

 

[mulot30th]

Narrow bands are to adjust engine a low loads (stoic).

Good for emission and fuel mileage.