G-Force Performance "chip" - what a joke.
 

MAZDA TRIBUTE G-Force Peformance Chip

Clearly just a resister in the IAT sensor wiring. My favorite part:

"The GForce Performance Chip reprograms your air/fuel ratio, ignition timing, and other aspects of your vehicle's engine to SAFELY increase the power, while increasing fuel economy significantly. Our chips are designed and programmed per vehicle. Your car will run smoother, run cooler and more efficiently at the same time. The gains we advertise are real, and are guaranteed with a money back promise. Our chips will not only increase horsepower, but torque as well for more REAL power. It increases power throughout the full RPM range unlike many competitors."

Oh...but it gets better:

"The GForce module installs into your MAZDA TRIBUTE's engine bay and is connected via 2 wires that plug into the IAT sensor. Diagrams are included. The unit is then able to reprogram the ECU thus improving your car's performance."

It reprograms your ECU through your IAT sensor. Wow...I bet a Mazda engineer (or even a NASA engineer) couldn't even do that. LOL!

...does that chip have the imprint "made in China" on it?

It will make the ECU think that the air temp is cooler than it really is which will somewhat advance the engine ignition timing, possibly forcing you to use a higher grade fuel. Definitely not worth it.

Wow, they even make them for my 1972 MGB and my 1981 Mitsubishi.

Actually, now that I have a "Scanguage"....
http://ecomodder.com/forum/showthrea...age-14781.html
....I mucked around with some resistors in my IAT sensor yesterday. I ended up with a 136K resistance between IAT sig and sensor ground to pull the sig voltage down a bit. However, it was cold last night (5C, 23F), so without a WAI this mod is a little pointless to even try. At 5C ambient, my modified IAT showed -35C (-31F). A two way run at 71 km/h, 1475 rpm (OD, TC locked) with and without resistor (total of 4 runs) made about 0.1 L/100km difference, lowering it from 8.3 (28.3mpg) to 8.2 (28.7mpg), but that's well within error margins, so whatever. The IGN timing didn't seem to change with or without resistor, but Again, the actual intake temp was probably way too cold.

This morning I dropped my wife off at the train and it was 14C (57F) outside and my IAT showed -12C (10F). I watched the timing and the knock sensor wasn't impeding on my party. But still, 14C intake air still isn't very warm. Now that it's Fall, I should really make a WAI to get the actual IAT up to "normal" Summer temps of 25C (77F) or so.

It is possible to get a reprogrammer that is external and without NASA.

Some Diesel tuning kits fit between the ECU and the injectors and intercept the signal from the former to the latter to change the fueling and timing. They can be removed and moved from car to car. The one I fancy for my (unbought) C1 is such a kit.

This, however, looks like the ebay resistor again.

I'd love one for my 72 MGB GT though. :)

True. I have installed those myself. I'm a diesel guy. They work AWESOME. They take the incoming injector pulses and modifies them without the ECM even knowing.