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Air/fuel ratio and SAFC-II Dyno tuning.

Old 02-21-08, 09:00 AM
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Air/fuel ratio and SAFC-II Dyno tuning.

Well, first of all, I searched, but I cant find anything solid. The information I find varies a whole lot.

I want to know, I am running a SAFC-II, 720 secondaries and a walbro fuel pump, boost controller set at 10.5 PSI. My air fuel ratio at full boost is 11.3:1. In some threads, I saw that that is to rich and I could have more hp and still be reliable if it ran a bit leaner, and on other threads it seems that I would be right on the money...I am really confused. Take note that I will never sacrifice reliability for power...So what should be my A/F ratio? Is 11.3:1 really what I need, or is it a tad rich?


Just a treat.

http://fr.youtube.com/watch?v=yNahXP7xa1g

Thanks.
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Old 02-21-08, 09:26 AM
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That actually sounds pretty good to me i ran mine like that for awhile before upgrading.
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Old 02-22-08, 07:03 AM
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Anyone else?
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Old 02-22-08, 09:17 AM
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I wouldn't got leaner than 11.7:1 or so. you have no timing control with the SAFC so that doesn't help.
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Old 02-22-08, 12:28 PM
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^Agreed.

What dyno was your run on? Do you have a chart? I'm interested in your power curve.
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Old 02-22-08, 10:17 PM
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I haven't scanned it yet...I'll have it on monday most likely.

Spec.
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Old 02-28-08, 10:05 PM
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LOW 12's should be ok since you have a front mount and proper fuel for your boost set up. good luck. Nice car though
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