Question about modifying can tune

[Jlope014]

Hey guys at Diablosport,
I have the predator for my '02 mustang 3.8 (yes it's a 6'er, leave me alone). I got it with the canned tunes and have been using the 93 octane tune consistently. Since I got this thing, I have added long tube headers, a k&n intake, and true dual exhaust with high flow cats (and a bunch of other non-related crap). I am flowing a good deal more air now versus stock, so I am wondering if it is safe to modify my tune by adding spark or fuel, and which if either I should change. I plan on getting a dyno tune eventually, but am just wondering if I can safely modify the canned one for the time being. I asked this once before (a long time ago) and was told I should never change the canned tunes, but my personal mechanic told me that with the amount of air I have added I should be adding more fuel. Would I need bigger fuel injectors, or is this safe at all?

[Jlope014]

Anyone???

[mikel]

ideally you should never blindly add timing or remove fuel without knowing what the current AFR is and without monitoring spark for peak power and any signs of detonation.

Thanks