Thread: air fuel ratio question
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Old 03-02-2014, 03:04 PM
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Dwight Dwight is offline
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Location: Florence, AL
Cobra Make, Engine: RCR GT 40 & 1966 Fairlane 390 5 speed
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Smile air fuel ratio question
I asked my Ford mechanic about air fuel ratio in my fuel injected Cobra motor. The custom chip is set at 12.5 to 1. My question is can I go higher with out damage to my motor? I have a street car not a race car.
He said my Town Car has 14.7 to 1 and most if not all new car / truck have 14.2 or higher.

Does anyone have any experience in street tuning? What is the highest ratio I can run with out melding my motor?
I think I can easily go 13.5.

What do you think?

Dwight
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