Same thing as installing a specific value resistor in place of the Intake Air Temp Sensor (IAT), except that it is variable. The idea is that you fool the ECU into thinking that the intake air temp is cooler than it actually is and then the ECU allows more ignition advance.
This can work, to a degree, in some applications. I used a 4.7K resistor on my LS1 and it did indeed work ... to a degree. It made the ECU think the intake air was something like 57 or 60 degrees (as aI recall). It would initially add some advance, but eventually would default since the temp never varied.
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Gordon Arnold
New Hampshire
2003 268 Vista ..................................................................Prior: 97 245 Sundowner
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