WOW, 20% for $35.00... why mess with NOS or a turbo. That would put RT's in the 200-205 HP with the chip and a can.
Most of this "cheap chips" are just a resistor that goes inline with some sensor that changes it's ohm value making the ECU beleive that some parameter ( air/fuel, air temp, air pressure ... etc.) is out of spec and in turn the ecu over fuels or changes timeing curve or both. It may result in a small gain, but not 20%... more like .20%. You are also messing with a value in the tuning that some engineer thought was the correct spec either for performance, reliablity, emissions.. what ever it it your taking a chance.
If you run the motor out of spec and you burn it down, now how much value have you gotten out of that chip. If EFI tuning were a simple thing there would be a 100 companies making them for 19.95. One burned up top end would cost you more then one EFI tuner ( boondocker for example ). Not to mention these types of changes in tuning often result in massive loss in fuel economy.
If they worked as advertised and you could get a 30 HP gain for that price don't you think every one on here would have one?
It's tempting at the price and that's how they get you. Save you money for a can, or controler box.
