Dyno charts are nice, but unfortunately most are almost useless when comparing minor hp changes. To be meaningful they need to be run on the same dyno by the same operator preferably on the same day with the same conditions. Otherwise small changes may be due to different conditions, not the mod. I've dynoed a vehicle on two different days at the same shop and observed a 15 hp difference - no engine mods. Why? Different conditions. Frankly on a tune which might add just 10 - 15 hp I'm more interested in observations on driveability and feel of the truck. That is the real value of these tunes. They are not meant to shave a second off your quarter mile times.<br />
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I agree wholeheartedly just wish there was a way to prove tangible results.

 

It takes time, money and dedication. Most of us are not willing or able to do a good job to quantify a performance difference. That is difficult to do with power increases of less than 7 percent anyway.



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