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What air/fuel ratio can do damage
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<blockquote data-quote="Arthur" data-source="post: 16550087" data-attributes="member: 193459"><p>Related to 1999 mustang cobra with blower.</p><p></p><p>I cannot find any information on what air/fuel ratio can do damage to your engine.</p><p>I read somewhere that if you have too rich a/f ratio then you can wash oil off the cylinders and permanently damage the engine.</p><p>If you have too lean condition then you can melt the piston.</p><p></p><p>But the main question what exactly numbers range are they?</p><p></p><p>I found this table that explaining but not telling the dead end for you engine:</p><ul> <li data-xf-list-type="ul">6 AFR - Rich Burn Limit (engine fully warm)</li> <li data-xf-list-type="ul">9 AFR - Black Smoke | Low Power</li> <li data-xf-list-type="ul">11.5 AFR - Best Rich Torque at Wide Open Throttle (WOT)</li> <li data-xf-list-type="ul">12.2 AFR - Safe Best Power at Wide Open Throttle (WOT)</li> <li data-xf-list-type="ul">13.3 AFR - Lean Best Torque</li> <li data-xf-list-type="ul">14.6 AFR - Stoichimometirc Air/Fuel Ratio Value (Stoich)</li> <li data-xf-list-type="ul">15.5 AFR - Lean Cruise</li> <li data-xf-list-type="ul">16.5 AFR - Usual Best Economy</li> <li data-xf-list-type="ul">18 AFR - Carbureted Lean Burn Limit</li> <li data-xf-list-type="ul">22+ AFR - EEC / EFI Lean Burn Limit<br /> <br /> If someone has this knowledge please share!<br /> Thank you</li> </ul></blockquote><p></p>
[QUOTE="Arthur, post: 16550087, member: 193459"] Related to 1999 mustang cobra with blower. I cannot find any information on what air/fuel ratio can do damage to your engine. I read somewhere that if you have too rich a/f ratio then you can wash oil off the cylinders and permanently damage the engine. If you have too lean condition then you can melt the piston. But the main question what exactly numbers range are they? I found this table that explaining but not telling the dead end for you engine: [LIST] [*]6 AFR - Rich Burn Limit (engine fully warm) [*]9 AFR - Black Smoke | Low Power [*]11.5 AFR - Best Rich Torque at Wide Open Throttle (WOT) [*]12.2 AFR - Safe Best Power at Wide Open Throttle (WOT) [*]13.3 AFR - Lean Best Torque [*]14.6 AFR - Stoichimometirc Air/Fuel Ratio Value (Stoich) [*]15.5 AFR - Lean Cruise [*]16.5 AFR - Usual Best Economy [*]18 AFR - Carbureted Lean Burn Limit [*]22+ AFR - EEC / EFI Lean Burn Limit If someone has this knowledge please share! Thank you [/LIST] [/QUOTE]
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