Where should I relocate the O2 sensor? Before the turbo or after.........like in the Downpipe?

 

Not using the HF...........log type.


Thanks.

 

at the end of the dp before cat, after turbo, or at top at manifold. i would place it in the same are as your car was stock. when i had my primary at the end of the dp before the cat it would bog and run too rich until i wot it just after startup. when i moved it to the manifold the problem went away.

 

Kool. The only logical place I saw that I could use was right before the cat. I'll try it there and see what happens.