Hey just curious if I put my wide band sensor in this circled location and open the cut out, would i still get accurate readings? In theory it seems legit but who knows?

 

Assuming your cut-out is installed the right way... NO, it won't read accurately once you open the cut-out.

 

No, most wide-band kits suggest an installed location within 16 inches at MOST from the cylinder head. The distance will vary, depend on what is capturing the data from the sensor. The further away you go, the cooler the gases will become, and potentially leading to inaccurate or useless data altogether.

Most sensors are placed 4-10 inches from the cylinder head. I would personally use that as a guide, that is, if you want your sensor output to mean anything. You should also allow a reasonable length of tubing to prevent pulse-scavenging from drawing in fresh air over the sensor itself. I would personally think that 24 inches would be enough.

If you do not understand the criticality of sensor placement, please research how an O2 sensor operates.

 

Thanks for the good information! This pipe will be welded on to my downpipe so the sensor will be within 24 inches from the cylinder head.

The cut out is installed the right way.

Ok in that case i'll put the sensor before the cut out. Do you mind further explaining why if i open cut out the sensor will start getting false readings?

 

always put before the cutout as exhaust gases will slow down greatly if cutout is open and you are trying to get an accurate reading...I learned the hard way...

 

To put it in a VERY basic nutshell, you are creating a low pressure area (open hole to atmosphere - cut out) before a high pressure area (the rest of the exhaust system). The air will follow the path of least resistance and if there is too much pressure differential, airflow will cease to stop (or at least greatly slow down) in the high pressure area.