Efi Live
EFI Live Programmer - Brainwashed
Speed density operation requires definition of a commanded fuel table (B3647). This is where to set the desired AFR for each operating point, (rpm vs MAP). Generally speaking, the naturally aspirated LS1 makes peak power around a 12.95 AFR. These engines are happy to cruise at a 14.7 AFR. Now, idle and low-speeds are somewhat tricky. First, the measured AFR in the exhaust at these low speeds may not be entirely representative of the combustion process--thanks to aggressive cam overlaps. So this low speed area will likely require some experimentation to find out which 'target AFR' makes the engine behave best. Standard convention would make you think that 14.7 is the best. Rarely is this true. Mistakes in this area are typically evident when a car 'bucks' and 'stumbles' at low speeds. This is where lousy or amateur tuners usually fall on their faces. Prepare yourself and be patient with this. View Related Article
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