Wideband before the turbo
07-25-2012, 11:12 AM
#2
On The Tree
I suppose it depends a lot on how hard the car is driven. This is really the worst place to put the sensor: it's hot and high pressure. Both things will kill it.
07-25-2012, 03:01 PM
#6
They probably also don't mind changing them out often!
The heat and turbulence pre turbo will give some funky readings some times. I think the EGT pre and 02 post is a good idea. Some turbo cars have o2 sensors specifically calibrated and designed to go pre-turbo, but they are usually only accurate to a certain point. For instance the Subaru WRX Sti has a pre-turbo o2 sensor, but below about 12.5:1 it gets very inaccurate.
The heat and turbulence pre turbo will give some funky readings some times. I think the EGT pre and 02 post is a good idea. Some turbo cars have o2 sensors specifically calibrated and designed to go pre-turbo, but they are usually only accurate to a certain point. For instance the Subaru WRX Sti has a pre-turbo o2 sensor, but below about 12.5:1 it gets very inaccurate.
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07-25-2012, 04:03 PM
#8
They have both. The o2 is a little lower in the manifold area, the EGT is in the up pipe. I would not consider it a true wideband, but when switched over to the post turbo side it DOES get a ton more accurate and will read down below 12:1 before there is a huge difference between it and a wideband.
