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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: 9745313" data-attributes="member: 105832"><p>12% is not low for a RWD stick shift car.</p><p>Any shop that uses 17% for a rwd stick car is taking away too much power and would cause me to question their abilities.</p><p>My last three cars were a 2009 WRX and two BMW 335i's.</p><p></p><p>The BMW is known to be underrated.</p><p>It's rated at 300, but most agree it's more like 320-325.</p><p>BMW 335i's would dyno on a dynojet around 275-285 rwhp SAE if the dynos were calibrated correctly.</p><p>Steve Dinan engine dynoed and then chassis dynoed the N54 and found around 11% drivetrain loss for the RWD car.</p><p>320-11% = 281 rwhp</p><p></p><p>The 2009 WRX is rated at 265 hp, but since it dynos only about 5 awhp less than the 305 hp rated STI, most believe the regular WRX is really making 295-298 hp.</p><p>My WRX along with most others put down 235 awhp.</p><p>Most AWD cars lose about 20% as I pointed out above.</p><p>295 - 20% = 236 awhp</p><p></p><p>I think those early dynos that showed 395 rwhp on the 2011 GT were not calibrated correctly or something.</p><p>If the 2011 GT really did make 425-430 crank hp in a 3600 lbs car, we'd see low 12's at 115+ mph traps.</p><p>We are seeing mid to high 12's @ 110-112 mph (when corrected to sea level, not on "fast" tracks with negative DA's).</p><p>Right about what you'd expect in a car with 412-418 hp.</p></blockquote><p></p>
[QUOTE="Driver72, post: 9745313, member: 105832"] 12% is not low for a RWD stick shift car. Any shop that uses 17% for a rwd stick car is taking away too much power and would cause me to question their abilities. My last three cars were a 2009 WRX and two BMW 335i's. The BMW is known to be underrated. It's rated at 300, but most agree it's more like 320-325. BMW 335i's would dyno on a dynojet around 275-285 rwhp SAE if the dynos were calibrated correctly. Steve Dinan engine dynoed and then chassis dynoed the N54 and found around 11% drivetrain loss for the RWD car. 320-11% = 281 rwhp The 2009 WRX is rated at 265 hp, but since it dynos only about 5 awhp less than the 305 hp rated STI, most believe the regular WRX is really making 295-298 hp. My WRX along with most others put down 235 awhp. Most AWD cars lose about 20% as I pointed out above. 295 - 20% = 236 awhp I think those early dynos that showed 395 rwhp on the 2011 GT were not calibrated correctly or something. If the 2011 GT really did make 425-430 crank hp in a 3600 lbs car, we'd see low 12's at 115+ mph traps. We are seeing mid to high 12's @ 110-112 mph (when corrected to sea level, not on "fast" tracks with negative DA's). Right about what you'd expect in a car with 412-418 hp. [/QUOTE]
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2011-2014 Mustang Talk
Had a brand new 5.0 on the dyno
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