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-   -   e39 1997 "g-force" performance chips? (http://www.bimmerfest.com/forums/showthread.php?t=666942)

Matthew540i 12-30-2012 10:29 AM

e39 1997 "g-force" performance chips?
 
Any advice on increasing performance with these type chips?
Do any work without damaging engine?
Looking for better mileage and/or horsepower.
Any info would be appreciated...
Thank you.

the540wgn 12-30-2012 12:24 PM

Quote:

Originally Posted by Matthew540i (Post 7279234)
Any advice on increasing performance with these type chips?
Do any work without damaging engine?
Looking for better mileage and/or horsepower.
Any info would be appreciated...
Thank you.

Don't know any e39ers that have the G-force Chip
Most of these "chips" are complete garbage

http://forums.bimmerforums.com/forum...07&postcount=6

http://www.bimmerfest.com/forums/sho...51&postcount=8

Better mileage -> higher octane fuel
More hp -> VF supercharger or M5

waehrik 12-30-2012 06:09 PM

That's exactly right, it is a resistor. These types of things are quite popular for the BMW motorcycle crowd since the older oilheads tend to run lean from the factory and surge. They're installed not as a power booster but to mitigate the surging condition.

The website even acknowledges they are installed using two wires to the IAT (intake air temp) sensor. It's a NTC (negative temperature coefficient) resistor that increases in resistance as the air gets cooler. By installing an additional resistance inline to the sensor, you make the engine think it's cooler outside and it runs richer. With O2 sensors it does absolutely nothing since the ECU will adapt. And our engines don't run overly lean anyways.


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