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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
ALL dyno Results in 3rd GEAR? 1:52 RATIO?
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<blockquote data-quote="Raptor 2014" data-source="post: 667915" data-attributes="member: 12350"><p>Questions - Have patients Newbee </p><p></p><p>It seems as though all dyno graphs are being done in 3rd gear - Which really screws the comparative results as to a standard 1.1 - 4th gear ratio used in testing of most vehicles.</p><p>Laymen’s terms – Dyno results show quite a bit higher than an actual (1:0 to1:0) ratio. If you dyno in 1st gear, HP & Torque will be even higher because of the gear ratio multiplication factor.</p><p></p><p>6R80 transmission ratios are to the best of my knowledge - </p><p>3rd – 1:52</p><p>4th – 1:14</p><p>5th - .86</p><p></p><p>Rear end ratio 4:1</p><p></p><p>With an OD tire size of 34.4 inches (315-70-17) </p><p>@ 6,000RPM the theoretical speed is – 98 MPH in 3rd – </p><p></p><p>I think the speed limiter from the factory is set at 110MPH for the BFG Tires on our 2014 trucks - (S) series tire.</p><p></p><p>In 4th (1:14 ratio) @ 110 MPH = Theoretical 5024 RPM </p><p></p><p>I currently have 2700miles on my Raptor but stile quite a bit of blow by past the rings so I haven’t dynoed yet. </p><p></p><p>Question – How do you ROUGHLY convert Dyno torque in 3rd gear (1:52) to an actual (1:0) Torque Ratio?</p></blockquote><p></p>
[QUOTE="Raptor 2014, post: 667915, member: 12350"] Questions - Have patients Newbee It seems as though all dyno graphs are being done in 3rd gear - Which really screws the comparative results as to a standard 1.1 - 4th gear ratio used in testing of most vehicles. Laymen’s terms – Dyno results show quite a bit higher than an actual (1:0 to1:0) ratio. If you dyno in 1st gear, HP & Torque will be even higher because of the gear ratio multiplication factor. 6R80 transmission ratios are to the best of my knowledge - 3rd – 1:52 4th – 1:14 5th - .86 Rear end ratio 4:1 With an OD tire size of 34.4 inches (315-70-17) @ 6,000RPM the theoretical speed is – 98 MPH in 3rd – I think the speed limiter from the factory is set at 110MPH for the BFG Tires on our 2014 trucks - (S) series tire. In 4th (1:14 ratio) @ 110 MPH = Theoretical 5024 RPM I currently have 2700miles on my Raptor but stile quite a bit of blow by past the rings so I haven’t dynoed yet. Question – How do you ROUGHLY convert Dyno torque in 3rd gear (1:52) to an actual (1:0) Torque Ratio? [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
ALL dyno Results in 3rd GEAR? 1:52 RATIO?
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