Originally Posted by
Azoriano
I just sent them a message with a few questions. I have been doing some research and JH so far has the better and reliable tune. To bad they don't post gains and dyno charts but like I've heard before from JH that can be tampered with to impress customers.
Exactly, so instead of providing dyno charts which are useless for multiple reasons (first and foremost they can be altered and tampered with, but also because dynos are different and some read high, some low, etc. and they don't properly provide the mass air flow of a moving car (that little fan they put in front of cars being dynoed is minimal compared to the forward velocity of a car).
Instead, they provide 1/4 mile improvement numbers as they represent real world acceleration performance. You won't be driving on a dyno. You'll be driving on the streets and highways.
Specifically for the 4.2 V8, JHM pretty much has the market cornered. That's they're specialty.
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