62nalide, regardless of who tuned your car and how the dyno was setup (both are dynojets so I can trust the configuration to a better degree than some other type of dyno), I fail to see why you don't think something is wrong with your car. ANY coyote with those mods auto or stick should be minimum 400 rwhp and probably around 420 depending on gears and transmission...maybe even 430. To be saying one tune is better than the other is pretty flawed IMHO when both tuners aren't working with a car that is functioning right. Post up a datalog of each dyno run with measured Afr both banks, spark advance 2, ltft both banks, stft both banks, rpm, vehicle speed, knock sensor, and lambse both banks along with full list of mods and conditions both dynos were run in and also what correction both dyno runs used (sae or std) and a bunch of us here can help you maybe figure out what is wrong with the car.
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2010 GT500
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