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PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Do you need O2 sensors w/ SD?

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Old 07-17-2009 | 09:36 AM
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Default Do you need O2 sensors w/ SD?
Running HP tuners 2 bar SD, fabbing up a new setup for turbo. Do you need any O2 sensors in the exhaust at all?
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Old 07-17-2009 | 10:15 AM
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You can tune it strictly off a wideband but I prefer to have the narrowbands in it for idle/part throttle tuning.
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Old 07-17-2009 | 11:23 AM
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So do you need them or not? are they used in a SD tune? Im not worried about them for tuning it. Im wondering if they are needed with SD.
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Old 07-17-2009 | 11:39 AM
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they have nothing to do with speed density, they are used for closed loop fuel control on the car. You can run CLSD, OLSD, CLMAF (OEM), or OLMAF...
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Old 07-17-2009 | 09:10 PM
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ok. I might be an idiot on this subject.... so I should put O2 bungs and run the 2 front ones on my turbo setup then? I had them on my old one, but i never used them to tune anything, I just used the WB.
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Can ANYthing in the tune alter fueling on one side of the motor only?




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