closed loop-how much delta fuel?
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closed loop-how much delta fuel?
does anybody know how much (percentage) change in overall fuel flow the O2 sensor will effect? i am doing an off-road setup (the ocean is way off-road) and i have heard closed loop is only about 2-3% for fine-tuning emissions. i have also heard it will affect fuel flow up to 10 to 15%. thanks.
Joined: Apr 2004
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From: Browns Town
Car: 86 Monte SS (730,$8D,G3,AP,4K,S_V4)
Engine: 406 Hyd Roller 236/242
Transmission: 700R4 HomeBrew, 2.4K stall
Axle/Gears: 3:73 Posi, 7.5 Soon to break
Re: closed loop-how much delta fuel?
More like 20%.
If you are farther than that you have obviously have other problems.
stock movements (on $8D anyway) are around 20 points leaner, 32 points richer adjustment can be made automatically.
That's with 128 being the cetered value.
By changing the bin file you could have additonal magnitude allowed but shouldn't be needed. Will cause problems if the O2 should fail.
If you are farther than that you have obviously have other problems.
stock movements (on $8D anyway) are around 20 points leaner, 32 points richer adjustment can be made automatically.
That's with 128 being the cetered value.
By changing the bin file you could have additonal magnitude allowed but shouldn't be needed. Will cause problems if the O2 should fail.
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Joined: Jan 2007
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From: 'Bama
Car: '89 IROC-Z
Engine: StealthRam 355
Transmission: 6-speed
Axle/Gears: 3.70 9-bolt
Re: closed loop-how much delta fuel?
The fuel trim feedback system is capable of making enormous changes in the fueling, potentially the 20% JP mentioned and more. A well-tuned engine should never need to adjust more than 5% unless there is a problem or failure.
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