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Thread: WBO2 sensor placement?

  1. #1

    Default WBO2 sensor placement?

    On the Sniper EFI, where is the best place to put the WBO2 sensor? I've looked through the Sniper EFI instructions and there is no mention about the WBO2 placement. I'm assuming it would be similar to FiTech's instructions. I would prefer to drill into the exhaust and not the header collector. My plans are to use the passenger side about 2" behind where the header & exhaust bolt up, but on the exhaust side, and at about a 10° angle.

  2. #2
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    Quote Originally Posted by caverman View Post
    I would prefer to drill into the exhaust and not the header collector. My plans are to use the passenger side about 2" behind where the header & exhaust bolt up, but on the exhaust side, and at about a 10° angle.
    Correct, I wouldn't locate the WBO2 sensor in the header collector. Several inches downstream of the header collector is a good location.
    http://documents.holley.com/199r11193.pdf (Holley Sniper EFI Quick Start Manual - Step #7, Page 8)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3
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    Danny, I put my WBO2 sensor about 2 inches before the bolt flange, instead of after (sensor is on the header). I erroneously thought the "collector" was the point on the header where the pipes came together, not the bolt flange. This would be about 4-5 inches forward of caverman's suggestion. Should I move it?

  4. #4
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    I'd have to see a picture of your header (merge) collector/WBO2 sensor location. I consider THIS a bad location.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #5
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    Looks close to your example to me:

    Click image for larger version. 

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  6. #6
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    Yeah, the WBO2 sensor probe is right in front of one primary tube. It would be better located after the collector flange.
    http://documents.holley.com/199r11193.pdf (Holley Sniper EFI Quick Start Manual - Step #7, Page 8)
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  7. #7
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    Thanks for your help Danny! FYI: When viewing A/F Ratio, it did seem to bounce about +/- 0.25 from target.

  8. #8
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    Quote Originally Posted by j_reins View Post
    Thanks for your help Danny!
    You're welcome.

    FYI: When viewing A/F Ratio, it did seem to bounce about +/- 0.25 from target.
    Well, it does fluctuate a little bit at idle.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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