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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Whipple Stage 1 Kit Feedback Thread!
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<blockquote data-quote="OPT PRIME" data-source="post: 1233477" data-attributes="member: 24166"><p>10spds was pulling -5. The question is, is that value knock retard, like you would see on an ECUTEK download, or knock detection? We don't know yet however one leads to another. </p><p></p><p>Most of the dynos tend to indicate that tunes are making a lot of power under the curve earlier on. As far as lean making power, sure. However lean also makes NO2 jump from an emissions stand point and extra heat can tend to roast the upstream cats. </p><p></p><p>Back when I was a Vette track guy dealing with 11.3:1 the technician asked me about catalytic overheat protection. He had mentioned disabling it on a ZR1 and it cooked the cats within a few laps. He wasn't sure an NA engine would suffer the same fate, it didn't. The algo inside the computer derives cat temps and eventually start dumping fuel to lower the exhaust temps. If my memory serves me correctly it was likely a 20% increase. </p><p></p><p>Anyways, that's a long way around explaining why Whipple may NOT have just leaned a tune in a vehicle that needs to be able to tow, deal with high cylinder pressures, sustained exhaust temperatures and CARB emissions compliance. </p><p></p><p></p><p></p><p></p><p>Sent from my iPhone using Tapatalk</p></blockquote><p></p>
[QUOTE="OPT PRIME, post: 1233477, member: 24166"] 10spds was pulling -5. The question is, is that value knock retard, like you would see on an ECUTEK download, or knock detection? We don't know yet however one leads to another. Most of the dynos tend to indicate that tunes are making a lot of power under the curve earlier on. As far as lean making power, sure. However lean also makes NO2 jump from an emissions stand point and extra heat can tend to roast the upstream cats. Back when I was a Vette track guy dealing with 11.3:1 the technician asked me about catalytic overheat protection. He had mentioned disabling it on a ZR1 and it cooked the cats within a few laps. He wasn't sure an NA engine would suffer the same fate, it didn't. The algo inside the computer derives cat temps and eventually start dumping fuel to lower the exhaust temps. If my memory serves me correctly it was likely a 20% increase. Anyways, that's a long way around explaining why Whipple may NOT have just leaned a tune in a vehicle that needs to be able to tow, deal with high cylinder pressures, sustained exhaust temperatures and CARB emissions compliance. Sent from my iPhone using Tapatalk [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Whipple Stage 1 Kit Feedback Thread!
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