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SVT Shelby GT500
HP limits on stock 2010 exhaust
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<blockquote data-quote="19COBRA93" data-source="post: 13857984" data-attributes="member: 10462"><p>It really depends on the EGR system. Running rich can actually increases the cat temp. Exhaust temp and cat temp are two different things. Yes, the exhaust temps exiting an engine are lower on a rich tune, but the raw fuel running through a cat and burning increases it's temp substantially. A really rich tune will have your cats glowing red in no time -If there is enough oxygen in the system VIA EGR to allow that fuel to burn in the cat. </p><p></p><p>The Cat Protection actually closes the EGR, then floods the cats with fuel to cool them. Without that, the EGR valve would be open, feeding oxygen into the exhaust, which would destroy the cats quite quickly.</p></blockquote><p></p>
[QUOTE="19COBRA93, post: 13857984, member: 10462"] It really depends on the EGR system. Running rich can actually increases the cat temp. Exhaust temp and cat temp are two different things. Yes, the exhaust temps exiting an engine are lower on a rich tune, but the raw fuel running through a cat and burning increases it's temp substantially. A really rich tune will have your cats glowing red in no time -If there is enough oxygen in the system VIA EGR to allow that fuel to burn in the cat. The Cat Protection actually closes the EGR, then floods the cats with fuel to cool them. Without that, the EGR valve would be open, feeding oxygen into the exhaust, which would destroy the cats quite quickly. [/QUOTE]
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HP limits on stock 2010 exhaust
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