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2011-2014 Mustangs
2011-2014 Mustang Talk
Had a brand new 5.0 on the dyno
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<blockquote data-quote="Driver72" data-source="post: 9745700" data-attributes="member: 105832"><p>I understand what you are saying. Yes dynojets read higher than Maha or Mustang dynos, for sure, as those are more road, load bearing dynos, they are actually a bit more accurate, but also require the higher drivetrain losses you mention due to the fact they introduce more "drag" as you'd really see on the street.</p><p></p><p>During Ford's certification process, the 5.0 engines produced 416-417 hp.</p><p>The SAE allows up to 1% variance (which is 4-5 hp), that's where the 412 hp rating from Ford came in.</p><p>They choose to take full advantage of the 1% and rated from there. They could of rated the engine at 416 hp, but if enough "owners" dynoed their cars or anybody engine dynoed a few and they had weak examples that got only 411-412, then a lawsuit could come into play.</p><p>Better to play safe.</p><p>But again, based on Ford's engine dyno testing with the SAE, they got 416-417 hp from the 5.0</p><p>Not the hyped up 425-435 some early testers were claiming based on an overzealous calibrated dynojet results.</p><p></p><p>416 hp - 12% = 366 rwhp</p><p></p><p>Also keep in mind it's never a set percentage.</p><p>Each car will have some variance due to tolerances.</p><p>I had a BMW 335i dyno day and tune install where 20 cars showed up with mileage of 800-5000 miles on the cars when their baselines were done.</p><p>There was an 11 rwhp variance between the 20 cars.</p><p>It happened to be the car with the most miles had the most power, but there were also many cars with the lowest mileage that were 5-7 rwhp more than others that were more broke in.</p><p></p><p>So you can never just say, "12%" or whatever.</p><p>That's why I said 12-15% on average.</p><p>Hell if you have an exceptionally strong car whose drivetrain is working in perfect harmony, you may have 420 hp from the crank and only lose 10-11% in the drivetrain.</p><p>As I'm sure you know, it's not a perfect science by any means.</p></blockquote><p></p>
[QUOTE="Driver72, post: 9745700, member: 105832"] I understand what you are saying. Yes dynojets read higher than Maha or Mustang dynos, for sure, as those are more road, load bearing dynos, they are actually a bit more accurate, but also require the higher drivetrain losses you mention due to the fact they introduce more "drag" as you'd really see on the street. During Ford's certification process, the 5.0 engines produced 416-417 hp. The SAE allows up to 1% variance (which is 4-5 hp), that's where the 412 hp rating from Ford came in. They choose to take full advantage of the 1% and rated from there. They could of rated the engine at 416 hp, but if enough "owners" dynoed their cars or anybody engine dynoed a few and they had weak examples that got only 411-412, then a lawsuit could come into play. Better to play safe. But again, based on Ford's engine dyno testing with the SAE, they got 416-417 hp from the 5.0 Not the hyped up 425-435 some early testers were claiming based on an overzealous calibrated dynojet results. 416 hp - 12% = 366 rwhp Also keep in mind it's never a set percentage. Each car will have some variance due to tolerances. I had a BMW 335i dyno day and tune install where 20 cars showed up with mileage of 800-5000 miles on the cars when their baselines were done. There was an 11 rwhp variance between the 20 cars. It happened to be the car with the most miles had the most power, but there were also many cars with the lowest mileage that were 5-7 rwhp more than others that were more broke in. So you can never just say, "12%" or whatever. That's why I said 12-15% on average. Hell if you have an exceptionally strong car whose drivetrain is working in perfect harmony, you may have 420 hp from the crank and only lose 10-11% in the drivetrain. As I'm sure you know, it's not a perfect science by any means. [/QUOTE]
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2011-2014 Mustang Talk
Had a brand new 5.0 on the dyno
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