flippincamaro

iTrader: (23)

Okay my truck has been single turbo then twin now going back big single, My ? is do I need to stick the o2s right after my headers before the turbo on each side or in my downpipe after the turbo? I have been told the heat before the turbo will screw them up, So I have always ran them after the turbo in the downpipe, But where should they go and why? Thanks for any help

otherwhitemeat

iTrader: (3)

after.....and you want it to be mounted around 8 to 12 inchs out. i don't know the tech info though.

cablebandit

iTrader: (37)

my incons had the o2s mounted in the manifold before the turbos. The pressure at wot does skew the readings but that is not an issue at idle/part throttle. Of course, you arent using them at wot. Now the wideband o2 does need to be after the turbo.

Old Geezer

iTrader: (3)

Absolutely right on the problems B4 the turbo.
Excessive heat, and gas pressure will affect the life, and accuracy of the sensor[s].
Best shot is in the DP, and at least a foot away from the turbo...

flippincamaro

iTrader: (23)

Thanks guys, That is where it is all going again then is after in the downpipe with the wideband, Thanks alot

Old Geezer

iTrader: (3)

When you weld in the bung, be sure the tip of the sensor is pointed downward. I like to position the bung between 10 and 2 o'clock. This position will prevent moisture from collecting in the protective shell, and ruining the sensor.

Ping King

iTrader: (20)

my o2s are mounted before the turbo. My WB is mounted after. Ive heard many different theories on how they should be mounted. I see how they can become all fugged up if you mount them before.

Several OEM cars, including my WRX have the O2 mounted before the turbo.

DrTurbo

iTrader: (3)

Narrow band O2's are before the turbo, widebands are after the turbo.