Quote:
Originally Posted by JustinCredibleM
If it did make it slower, then all the intake dynos would show it, but they all show some type of gain to be had. However, if you look at the intake, there is a box around so its enclosed to cool air when the hood is closed. Also, as cmkde mentioned, it should help at the higher boost levels with the JB4 since it'll allow more air to move through.
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OP, I'm not a fan of JB4 or any other piggy back tunes. IMO, piggyback tunes are just not sophisticated enough and/or rely on unreliable sensors like the knock sensor to increase fuel, advance or retard timing when boost dials up or down. Sometimes, things go wrong and you detonate.
Here is a good video that factually describes a piggy back vs a real tune.