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Old 04-07-2006, 11:36 AM   #1
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Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
The 93 W/EJ20K
Series 10 FRS

Default cold start AFR

so i have been working on cold starts on my tec

any one have a recomeded target afr for startup

i have been using 12.5to1 from 10-50C then switching to closed loop at 51C
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Old 04-07-2006, 02:50 PM   #2
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Join Date: Mar 2004
Chapter/Region: NWIC
Location: Seattle, WA
04 Improved STI
Dirty White


That's about what I run. With the Hydra the first 30 seconds are even richer (11-11.5:1) with the post start enrichment. I think I stop adding any enrichment fuel at 70C, but if you car doesn't mind it at 51C, go for it. Currently I idle when warm at 14.5, but may tune up to 14.7 or higher at some point.
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