Quote:
Originally Posted by AFSNightrod
I have a friend with an '05 GT and he was tellin me it was a pain to modify because you need a dyno tune for nearly every mod you make to get the most out of it. Where you could get away with a cam swap and full exhaust in a 4th gen F-body(not suggested but you could still drive it without it running like total crap and get decent performance), You would need to get tuned for say... a cold air intake and a cat-back. I don't know how true this really is but this guy was pretty adamant about it.
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For the most part he is telling the truth, but it isn't as bad as it might sound since plenty of tuners offer updated tunes without having to get on a dyno and custom tune the car. You just need to have a programming tool, load the tune into the programmer from free downloadable computer software, and load into your car....easy peasy. Of course a custom dyno tune will squeeze out that last bit of potential, but you can do well without.
A tune is necessary for a CAI on a new Mustang, because a CAI actually improves the airflow on that engine so much it screws with the air fuel ratios significantly and the ECU has to be corrected. A CAI/tune combo on a new Mustang will give the new mustang about 20-25 rwhp and 25-30 torque and significantly reduce throttle lag from the stock drive-by-wire programming.
The only exhaust modification that might really need a tune are long tube headers or off-road catless mid-pipes, but it isn't really necessary. The biggest thing a tune would do is make adjustments so that the O2 sensors don't get messed up readings which may or may not happen anyway.