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Old 08-02-2012, 03:50 PM   #1 (permalink)
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Afc tuning

So I just wanted to be sure my thinking is correct here in reguards to tuning the afc. The smoke screw handles pre boost fueling, the star wheel sets max fuelling correct?

So if my truck smokes at idel or before boost is obtained I need dial the screw back to get less fueling pre boost. Now if it smokes under acceleration I need to turn the star wheel so that it pushes my max fueling to a higher psi correct? Or am I way off base here?

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Old 08-02-2012, 08:30 PM   #2 (permalink)
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The smoke screw is your zero boost fuel. You want to back this out about all the way then drive the truck. After each "test drive" turn the screw in about 1/8 of a turn. Keep doing this and after a while you will hit a sweet spot that will spool your turbo very quickly. Its easier said than done and takes some time so try to be patient. Next is the starwheel. Its your "midrange" fueling. Its all really personal preference. Similar to the smoke screw their is a "optimal spot" The fuel plate is what takes over at wot. Hopes this helps.
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Old 08-03-2012, 12:14 AM   #3 (permalink)
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So how do I know the star wheel is in the optimal spot? What should i look for?

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Old 08-10-2012, 09:48 PM   #4 (permalink)
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Really its all opinion, after you get the smoke screw dialed in, turn the starwheel towards passenger side of the truck. Turn it a bit and drive it (from stock position) and drive it. Like the smoke screw their is a "optimal" spot, its really trial and error. It will smoke more and should pull a little harder, keep turning it until your happy with it. If you go to far it will be laggy and spool slower because you are giving it to much fuel and basically "putting out the fire"
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Old 08-10-2012, 11:59 PM   #5 (permalink)
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Spend some time reading this

afc tuning explained

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