A/F Ratios??? <PLZ help>
#1
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Join Date: Dec 2005
Location: Niskayuna, NY, USA
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A/F Ratios??? <PLZ help>
Ok, here is the thing. I've talked to 3 ppl about this and 2 of em said that it should be 12.5:1 through out the whole map. And then 1 person said that it should be 14.7:1 until 50% throttle then 13.5:1 until boost and 12.5:1 in the boost but he said that works for his Eclipse and he is not sure if this is right for honda. So I have a question for all u honda tuners (d-series would be a lil more helpful). What A/F ratios do I need to use?
Thank you
Here is some info I found about A/F tunin that I found online so people dont say "SEARCH"
This is from hondata how-to website: (www.hondata.com)
The ideal mixture at full load (for a non boosted engine) is a matter of option but generally lambda 0.88-0.92 (air/fuel 13:1 - 13.5:1) produces the most power. Measurement of the mixture is best achieved with a wide band lambda meter. An exhaust gas analyser may be used, but tend to have a slow response time (although they are more accurate than lambda meters).
With forced induction the ideal mixture will be a richer under boost. Generally lambda 0.82-0.86 (air/fuel 12:1 to 12.6:1) is suitable for a boosted engine. For engines with a detonation problem richer mixtures can be used.
This is from (http://www.importbuilders.com/tuningacar.htm)
Thank you
Here is some info I found about A/F tunin that I found online so people dont say "SEARCH"
This is from hondata how-to website: (www.hondata.com)
The ideal mixture at full load (for a non boosted engine) is a matter of option but generally lambda 0.88-0.92 (air/fuel 13:1 - 13.5:1) produces the most power. Measurement of the mixture is best achieved with a wide band lambda meter. An exhaust gas analyser may be used, but tend to have a slow response time (although they are more accurate than lambda meters).
With forced induction the ideal mixture will be a richer under boost. Generally lambda 0.82-0.86 (air/fuel 12:1 to 12.6:1) is suitable for a boosted engine. For engines with a detonation problem richer mixtures can be used.
This is from (http://www.importbuilders.com/tuningacar.htm)
#2
Re: A/F Ratios??? <PLZ help> (Niskyspy)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Niskyspy »</TD></TR><TR><TD CLASS="quote">Here is some info I found about A/F tunin that I found online so people dont say "SEARCH"</TD></TR></TABLE>
SEARCH. This picture is posted all over h-t:
SEARCH. This picture is posted all over h-t:
#4
Honda-Tech Member
Re: (Teglove2)
i tune boosted cars to an a/f of 11.5-11.8 in boost just to be on the safe side. for part throttle driving u can set the a/f to high 14to 15:1 a/f for great gas milage. when u floor the car u should go into the 13:1-12.5:1 a/f at the 0 psi mark then smoothly richen the mixture to the 11.5-11.8:1 in boost
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