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New Edge Cobras
What air/fuel ratio can do damage
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<blockquote data-quote="smashedheadcat" data-source="post: 16550103" data-attributes="member: 7756"><p>Ford set the 03-04 cobra at 12:1 (.82 stoich). I’d say the consensus is that it’s on the lean side of conservative, but fueling isn’t the only variable.</p><p></p><p>Washing the oil off of the cylinder walls: My opinion.... nothing to worry about. You’ll be hard pressed to find an engine failure on this board from that. Also note, e85 stoich is 9.85(ish):1.</p><p></p><p>After all that yapping, if you’ve got a blower on a stock block 99 cobra, keep the power in the 400rwhp range if you want it to stay together. You can get that with a fat fuel table, low timing and low boost. If you want to cook it, run pump gas, 12.2 afr and MBT timing on 15psi.</p></blockquote><p></p>
[QUOTE="smashedheadcat, post: 16550103, member: 7756"] Ford set the 03-04 cobra at 12:1 (.82 stoich). I’d say the consensus is that it’s on the lean side of conservative, but fueling isn’t the only variable. Washing the oil off of the cylinder walls: My opinion.... nothing to worry about. You’ll be hard pressed to find an engine failure on this board from that. Also note, e85 stoich is 9.85(ish):1. After all that yapping, if you’ve got a blower on a stock block 99 cobra, keep the power in the 400rwhp range if you want it to stay together. You can get that with a fat fuel table, low timing and low boost. If you want to cook it, run pump gas, 12.2 afr and MBT timing on 15psi. [/QUOTE]
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What air/fuel ratio can do damage
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