How can we trick the car into running richer?

marlinspike said:

Perhaps you could replace the air intake temp sensor with a high resistance resistor? Though this would also retard the timing.

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why would it retard timing. Isn't timing a leard fuction via the knock sensor?

anyway take a look at this mixture control

marlinspike said:

Bugszrt, it's cause he's got aftermarket headers on.

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My brother just got headers on his charger. He is going to the dyno and will have the A/F charted. I believe headers will make a speed density system run a little leaner but from what I've seen these cars need to be leaned out some.

I will post the before headers and after headers A/F readings.