[Mustang Dave]

Originally Posted by leety

Anyone looked into this?

Redline Power Chip myth debunked - FROM THE SOURCE! | eBay

Would love to hear from ya'll about your experience with this.

I lost count of the spelling and grammar errors on that page. Don't waste your money.

That said, I purchased a HyperTech Max Energy Power Programmer for my Mustang in May of 2009. This is far more than a resistor in parallel with the Intake Air Temperature Sensor. It plugs into the OBD-II port and re-programs the ECU to make minor adjustments to air/fuel ratio and ignition timing for more power and torque. It makes a noticeable "seat of the pants" (and dynamometer graph) difference in low-end torque. It doesn't make a noticeable difference in fuel economy unless I program it for premium fuel, which yields lower MPG, primarily because premium fuel has less energy per gallon than 87 octane regular fuel. It cost $360. It won't pay for itself in fuel saving, since it doesn't make a difference in MPG, but the additional low-end torque is worth the price, from my point of view.
YMMV.