Best A/F ratio for 04+ N/A 5.4 Engine

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Oct 9, 2007 | 06:53 PM

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From: Truck Heaven

Best A/F ratio for 04+ N/A 5.4 Engine

Where do these engines safely make the most HP for a N/A application on 93 octane?

Oct 9, 2007 | 07:25 PM

tarinitup

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From: Odessa Texas

12.8 -13.0

Oct 14, 2007 | 01:08 PM

one03sierra

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From: league city texas

12.0 to 12.5 is the best for the new three valve engines. this is according to the tuners that are tuning them. mine is at 12.3 and it runs great.

Oct 14, 2007 | 01:27 PM

dirt track racer 81

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From: Hennessey, Oklahoma

the ones i tuned i set them at 12.5

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