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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
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<blockquote data-quote="FordTechOne" data-source="post: 1536924" data-attributes="member: 35543"><p>Gen 2s already have very short 1st gear of 4.69:1, which is made possible due to the 10 speed. Combined with the 4.10 axles and 510lb/ft of torque with a broad curve, off the line acceleration isn’t lacking even with 37’s. The turbochargers need load to build boost; with shorter gears you will increase time-to-torque (boost) and risk redlining in first gear without ever building full boost, which results in slower acceleration. Also note that numerically higher (“shorter”) gear ratios create more drag, which lowers WHP and efficiency.</p></blockquote><p></p>
[QUOTE="FordTechOne, post: 1536924, member: 35543"] Gen 2s already have very short 1st gear of 4.69:1, which is made possible due to the 10 speed. Combined with the 4.10 axles and 510lb/ft of torque with a broad curve, off the line acceleration isn’t lacking even with 37’s. The turbochargers need load to build boost; with shorter gears you will increase time-to-torque (boost) and risk redlining in first gear without ever building full boost, which results in slower acceleration. Also note that numerically higher (“shorter”) gear ratios create more drag, which lowers WHP and efficiency. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
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