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Those running standalone, whats the optimal A/F ratio in partial throttle?

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Old Jun 4, 2005 | 10:45 PM
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Default Those running standalone, whats the optimal A/F ratio in partial throttle?

Should it be the same as WOT at 13.7? Is it safe to run little leaner since this is for partial throttle?
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Old Jun 4, 2005 | 11:04 PM
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Default Re: Those running standalone, whats the optimal A/F ratio in partial throttle? (VSBB6)

Yes, if it's not at full load, you can run it leaner.
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Old Jun 4, 2005 | 11:19 PM
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Default Re: Those running standalone, whats the optimal A/F ratio in partial throttle? (homesauce)

How much leaner can I run and still be safe? 14.5 -14.9?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by homesauce &raquo;</TD></TR><TR><TD CLASS="quote">Yes, if it's not at full load, you can run it leaner.</TD></TR></TABLE>
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Old Jun 5, 2005 | 10:24 AM
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Default Re: Those running standalone, whats the optimal A/F ratio in partial throttle? (VSBB6)

If by partial throttle you mean cruising, then close to 14.7 is fine, maybe a little under to compensate for load changes. If you mean light acceleration, then it's still good to have a little extra fuel around 13.7-14. For WOT I have it around 13.2-13.5. Is 13.7 more optimal for NA set ups at WOT?
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Old Jun 5, 2005 | 01:05 PM
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Default Re: Those running standalone, whats the optimal A/F ratio in partial throttle? (2lude4u)

At anything but WOT you want to be as close to stoich as possible (14.7:1). I know people who actually run it a little lean (15.2:1) in 5th so when they're cruising long distances they get better mileage, usually these cars are running on higher octane though.....
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Old Jun 5, 2005 | 07:00 PM
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Default Re: Those running standalone, whats the optimal A/F ratio in partial throttle? (Firedrake)

at partial throttle you should have a closed loop map that runs off the o2 sensor

at WOT you should be on open loop map and not using the o2 sensor

closed loop stays around 14.7 i thought and might even try to lean it out more? iono

open loop should stay at what... 13.2? whatever is good for WOT

least that the jist of what i undersatnd
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Old Jun 6, 2005 | 06:57 AM
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u can sit it around 15 at part throttle
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Old Jun 6, 2005 | 07:22 AM
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you ought to read jeff's guidlines on tuning....check out importreview.com

hes got a whole writeup on tuning, some real good info from a real good tuner....
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