How badly will CMDPs affect the fuel economy on my 06 Mustang GT? I am considering this mod for the future, but if it's going to hurt the fuel economy a lot then I may not opt to install them.

 

The only time i saw a drastic change was when i loaded the 93 Race tune. When i was running the performance tune there was no real loss in MPG. I acctually saw a gain of 1-2 MPG but when i loaded the race tune i lost about 2-4 MPG

 

The benefit is worth a minuet loss, however the only loss ur gonna get will be from ur foot being in it more.

 

Like Colby said it is worth every penney extra i spend at the pump. The car was ok after i tuned it but once i added the plates the car was screaming down the road. It really woke up some sleeping power in the engine.

 

I didn't see any loss. Heck I haven't seen any measurable loss with the addition of the 4.10's either.

I will say this, even if there was zero power to be gained by doing the delete plates, it's still highly worth it. The car just drives so much better. It does exactly what you want it to do. No sitting around and weighting for the charge plates to decide where they want to be. The car is so much smoother.

There is a pretty noticeably pickup in the mid-range though, which is always nice. I personally didn't notice any loss in torque.