Just turbocharged my Zc. Should I put the O2 sensor before the turbo (like on the turbo mani) or after (like the downpipe) ?

 

after

 

Thanks!!

 

you can put it anywhere in the system. i had mine at end of dp and top of mannifold. the y7 has it orig at the manifold and it runs better just after startup having it there. it ran very rich and bogged until i made a wot pull just after startup when it was at the end of dp.

 

Mine is on manifold... before turbo - better as it heats up faster (O2 sensor needs to warm up to function properly).