spark setting

05dream

New Member
Feb 24, 2007
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Hello all,
I have a really newbie question here. I have a 05 Mustang GT SCT tuner and C&L with no muffles.If I set the spark to the max on all RPM range 0-2000 -14 Spark - is the only option that I have no + and say 2000-4000 -8 4000-8000 -4. What would it be doing to this car?
Thanks,for your help.:shrug: