if any, how much hp gain would i see if i got my car dyno tuned? I have a diablo tuner but i was just reading that custom tunes are only needed for "modified" mustangs. I guess the other question i have is how modified do you have to be to see gains from a custom tune with a dyno?

 

10-15 hp unless the motor has been worked, usual see bigger gains when heads and cam have been swapped.

 

you wont see much with your mods, your diablosport will hold you over for now.

I had the same question and its just not worth it. im planning on down2/3 pi swap and i might go ahead and get it tuned after that

 

+1
It is not worth it until you put some more mods in your car. JMO

 

yea it wont do much but maybe get better air/ fuel and ignition timing so bout what everyone else said 7-20, 20 ballpark