I plan on routing my wastegate dump tube back into the exhaust downpipe, should I be worried about routing the dump tube before my wideband o2 sensor? Or should I just route it after the sensor? Also where is the optimal spot to put the o2 sensor bung in the downpipe. On a previous build I used an AEM UEGO wideband and the instructions said something about 14" from the turbo if I recall correctly. I am using an Innovate Motorsports LC-1 on this build and the instructions only say to limit the heat that the sensor will be exposed to. I want to just put the sensor in the downpipe at the back of the engine, just after the oil pan. Can anyone confirm that this will be fine?

 

it doesn't matter where your dump is routed. that location is fine.

 

Thanks for the reply, I was just concerned that it would throw off my afr reading

 

Yeah, dump tube placement won't change anything. Seems like most companies say 12-14" from turbo outlet. I know I had my Lc-1 about 4" from the outlet, just after the first bend, and it was horribly inaccurate and the sensor burned out in like 2 months DOH!

Most seems to stick the about 12" down, somewhere at or around the second bend, where it starts to go under the oil pan....

 

it won't, as the o2 sensor only takes a small sample of air anyway.