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Old 11-12-2015, 03:42 AM   #1 (permalink)
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Default Speedy Daddy Header O2 Sensor Location Question

I installed speed daddy headers yesterday shown in the picture below (along with the 2-1 y-pipe not shown). The O2 bung in the y-pipe resulted in the primary O2 sensor practically touching the driver side axle boot, which is not a great idea long term (I can get a pic tonight if you're interested).

Question is, has anyone used the O2 bung shown below coming off of the single cylinder? If so, did the car run okay even though it is only basing fuel trims off one cylinder?

I have seen some brief discussions on this in the past with mixed reviews.

Open to suggestions here. Thx

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Old 11-12-2015, 07:44 AM   #2 (permalink)
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The close sensor bung is for obd0 cars with non heated o2 sensors. You can use it bit it's not as accurate since it reads one cylinder only. I run my o2 in the a pipe near the boot and its been 25k miles without damage.
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Old 11-12-2015, 08:15 AM   #3 (permalink)
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The close sensor bung is for obd0 cars with non heated o2 sensors. You can use it bit it's not as accurate since it reads one cylinder only. I run my o2 in the a pipe near the boot and its been 25k miles without damage.
Good to know. Running an aftermarket header as well? If so, which one? I have ran two aftermarket headers like this on two different EXs with the same result (really close to the boot). Hopefully I'm just being over cautious
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Old 11-12-2015, 08:31 AM   #4 (permalink)
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does the axle look like it will come into contact with suspension movement? if so see about having the port relocated to the side.
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Old 11-12-2015, 08:34 AM   #5 (permalink)
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does the axle look like it will come into contact with suspension movement? if so see about having the port relocated to the side.
With the car jacked up and the suspension hanging down at its lowest point, the O2 sensor just barely touches the axle boot. When the car is resting on its wheels (normal ride height) there is roughly a 1/4 in gap or so between the O2 sensor and the boot. So super close, but not in direct. Contact at a nominal ride height.

Maybe I should just get lowering springs to solve the problem haha
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Old 11-12-2015, 10:09 AM   #6 (permalink)
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buy a 90degree angle piece for the O2

you would think after 20 years of offering these china headers, they would finally fix it, but alas, they did not.

you do have an option of simply grabbing a different ebay header. Probably cheaper than having your current one fixed.

Try to find an ebay auction where it shows the exact item being sold. Some are offset like yours, others are centered, but pointing towards the back (not so great either, can touch subframe)

The better options are the ones who foolishly point it nearly straight down, but again, a 90degree O2 fitting works great here as well.
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Old 11-12-2015, 11:07 AM   #7 (permalink)
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Quote:
Originally Posted by mattliston View Post
buy a 90degree angle piece for the O2

you would think after 20 years of offering these china headers, they would finally fix it, but alas, they did not.

you do have an option of simply grabbing a different ebay header. Probably cheaper than having your current one fixed.

Try to find an ebay auction where it shows the exact item being sold. Some are offset like yours, others are centered, but pointing towards the back (not so great either, can touch subframe)

The better options are the ones who foolishly point it nearly straight down, but again, a 90degree O2 fitting works great here as well.
Can't believe I didn't think of the 90 degree O2 fitting adapter piece!! have seen these plenty in the past but forgot about them. Great idea. I am going to do some looking and will likely order one tonight to mitigate the problem.
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Old 11-12-2015, 03:45 PM   #8 (permalink)
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yeah the QC on these cheap chinese DC sports knockoffs sucks. I am lowered slightly, I have seen signs of contact on the sleeve over the wiring but nothing that has me overly concerned. the only time it might contact for me is at full extension of the suspension.
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Old 11-12-2015, 03:45 PM   #9 (permalink)
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Quote:
Originally Posted by 97AutoXVette View Post
Good to know. Running an aftermarket header as well? If so, which one? I have ran two aftermarket headers like this on two different EXs with the same result (really close to the boot). Hopefully I'm just being over cautious
Never touched on any of my civics, the header, motor and axle are all one.
They move together for they wont touch. If there is space that space will always be there.

Now the wiring does have to be pulled towards the firwall and zip tie up.
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Old 11-15-2015, 06:22 AM   #10 (permalink)
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Quote:
Originally Posted by 97AutoXVette View Post
Can't believe I didn't think of the 90 degree O2 fitting adapter piece!! have seen these plenty in the past but forgot about them. Great idea. I am going to do some looking and will likely order one tonight to mitigate the problem.
Just an FYI if you have emissions inspections in your area a non-fouler or a 90 on the O2 sensor will cause an instafail during visual. I'm going through the same issue myself. I bought a new bung and I'm having my buddy relocate it to a better spot and weld it up proper.
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