You can't compare Dyno numbers with a Manual car. You have an automatic, therefore, you will lose more power through your drive train. Don't be fooled by the numbers. Be smart and educate yourself.Then my runs were way off...my fastest quarter was a 13.07 @108.96 and your stock numbers are way better than my modded. Definitely need to find another dyno and run it again in the right gear...:angry:
Quick rule of thumb: Manuals lose about 15% to the rear wheels on a chassis dyno. Automatics lose about 25-30% to the rear wheels on a chassis dyno.
It also doesn't help your case that the manuals are rated at 426HP and the Auto's are 400HP even.
As far as the 1/4 mile times, an Auto will "Almost" Always outrun a manual. Especially if someone with limited or no experience racing it. More than likely, that's why your time is quicker. Not to mention, you're going to get more wheel spin with a manual, unless the driver knows precisely how to slip the clutch and not over-rev the engine on the start.
So, before you start thinking the dyno machine and/or business has no idea what they are doing, make sure you know what you're talking about. And like Powerfreak suggested, you will always use the gear that is closest 1:1 ratio, which would be your 4th gear.
Hope I cleared the muddy water for you.... :thumbsup: