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should I uprev?

Originally Posted by Mandingo Thinking about getting Uprev also. What do tuners use to measure the A/F ratio? Its not just the stock sensors right? Sorry if thats a dumb

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Old 06-29-2011, 10:02 PM   #1 (permalink)
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Thinking about getting Uprev also.
What do tuners use to measure the A/F ratio? Its not just the stock sensors right? Sorry if thats a dumb question
Depends on the tuner. The car has both narrowbands (to verify the cat works), and widebands (for fuel control) on each bank. So it is possible to tune based on the stock widebands. Often the dyno has it's own O2 that can be stuck into the tailpipe, or into a spare bung in the exhaust.
The narrowband can also be temporarily removed and the dyno's wideband put in it's place.
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Old 06-29-2011, 11:45 PM   #2 (permalink)
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Originally Posted by ChipsWithDips View Post
Depends on the tuner. The car has both narrowbands (to verify the cat works), and widebands (for fuel control) on each bank. So it is possible to tune based on the stock widebands. Often the dyno has it's own O2 that can be stuck into the tailpipe, or into a spare bung in the exhaust.
The narrowband can also be temporarily removed and the dyno's wideband put in it's place.
Makes sense. Thanks!
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