using a hf manifold for a t25 set up on a crx,can we put the stock 02 sensor in the hf spot right before the turbo?

going to weld in a bung for the wideband o2 sensor in the dp .

but we have to plug the hf hole,might as well use the stock o2 sensor,will it get messed up?

 

That might be too hot for the O2 sensor....... on the mani.

 

thats what i would think... but for low boost it should be ok.
The exhaust being under pressure may affect the reading slightly, but i wouldnt
think it would be too much of a difference.

 

why would it be too hot before the turbo in the stock o2 hole? that's where mine was before i turbo'd and that's where i kept it. when i was n/a and got a dc sports header and put the o2 at the end of the header it took longer to warm up and bogged bad after starting the car cold or warm until getting on it hard once after starting. because of this i figured it was better to put it there.

plus, if you are going to put your wideband at the end of the downpipe you need to put the primary somewhere when you tune unless you plan on putting 2 bungs at the end of the downpipe.

i would say if it was there before you went turbo, go ahead and keep it there. if it was at the end of your header to start with put 2 bungs there...1 for primary and 1 for wideband.

 

Yeah, you are right. I was thinking about my stock location down under the car. I forgot some are located up on the mani.
My FJO wideband replaces my stock O2 sensor.