Single turbo o2 sensor setup
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Single turbo o2 sensor setup I have a 5.3 with a single turbo. I’m running the Hooker Turbo LS manifold set with crossover pipe. Anyone familiar with the passenger side manifold, there is a 3” vband flange. That feeds my turbo. From the turbo I’m running a 3” downpipe. About 20” down the pipe is the o2 sensor. I’m running one... I’m also running a SD tune. Does this sound about right or normal? I’m worried about running an O2 right off the manifold pre turbo..
any input put would be great.
any input put would be great.
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This is the turbo piping I’m running. I could throw one in the cross over pipe to read the driver side bank but on the passenger side due to it being cast iron.. and the D side feeds into the P side manifold and the merge at the front
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I ran a narrow band in each manifold pre turbo and my wideband about 12 inchs behind the turbo. No failures for 40,000 miles. I replaced the narrow bands awhile back thinking the pressure would have harmed them but the new ones didnt read any different at all. So in my experience pre turbo doesnt hurt a narrowband.
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Ive been running 1 single narrowband in my downpipe. It is wired to both sensor inputs to the pcm. Works perfect imo the closed loop fueling stays between 14.6-15.0 back and forth.
I figure I tuned it off 1 sensor in the downpipe so why not have the narrow band there too. And I only had to buy 1 sensor lol
And it will 100% help part throttle. Maybe some of the great tuners can make a VE table that's close enough year round and leave it open loop. But I just stick a narrowband in and let the pcm do it's thing
Thread Starter
TECH Regular
Joined: Aug 2007
Posts: 405
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Ive been running 1 single narrowband in my downpipe. It is wired to both sensor inputs to the pcm. Works perfect imo the closed loop fueling stays between 14.6-15.0 back and forth.
I figure I tuned it off 1 sensor in the downpipe so why not have the narrow band there too. And I only had to buy 1 sensor lol
And it will 100% help part throttle. Maybe some of the great tuners can make a VE table that's close enough year round and leave it open loop. But I just stick a narrowband in and let the pcm do it's thing
I figure I tuned it off 1 sensor in the downpipe so why not have the narrow band there too. And I only had to buy 1 sensor lol
And it will 100% help part throttle. Maybe some of the great tuners can make a VE table that's close enough year round and leave it open loop. But I just stick a narrowband in and let the pcm do it's thing
Copy that, I did not know you could wire 2 into one sensor. Makes sense! Thanks guys for the input!! I’m going to go that route (wiring 2 into 1) and the relocate the narrow band into the pre turbo pipe for a more accurate reading. And leave my wideband in the down pipe.
Copy that, I did not know you could wire 2 into one sensor. Makes sense! Thanks guys for the input!! I’m going to go that route (wiring 2 into 1) and the relocate the narrow band into the pre turbo pipe for a more accurate reading. And leave my wideband in the down pipe.
Supposedly pre turbo pressure will skew the o2 sensor readings. Most advise against putting them there. But I have seen guys that put their wideband pre turbo and tune like that, but then again I read wideband isn't as affected by pressure as narrowbands.
I put mine in the downpipe because of the pressure skewing. There are several threads talking about the narrowband vs pressure thing. I never put mine pre turbo so I can't comment on that