green machine

Does anybody have any mods to the afc or p pump that will increase fuel mileage. I know it doesn't help im running 35's but besides that is there maybe a fuel additive or something to increase mileage. Thanks

displacedtexan

Bumping the timing is by far the best thing you can do to increase mileage.

Setting things for a minimum of smoke helps as well.

drolex

What exactly does bumping the timing do?

green machine

like drolex what is bump the timing do and how do you do it

Need95-00CTD

Bumping the timing is making the injectors begin there pulse sooner, so instead of injecting the fuel at 11* or whatever before TDC, it injects fuel at 16* TDC...This gives the fuel more time to burn, and means that 90% of your fuel is being used for power instead of 70%.

If you have to ask how to do it, take it to someone who knows what there doing, but make sure its ok if you watch them. If you can find a good reputable mechanic who will let you watch as he works, your golden, its nice to watch someone with experience to learn from, they already know all of the tricks to keep your knuckles from bleeding, and your mouth clean (if you know what I mean).

displacedtexan

Advancing the timing will...

Decrease exhaust temperature
Increase cylinder temperatures/pressures
Increase fuel economy (yes, economy is better)
Increase your output of NOx (a pollutant)
Decrease your output of Hydrocarbons (a pollutant)
Increase the amount of black smoke at peak torque

drolex

How could it increase cylinder temps but decrease exhaust temps? How can it increase fuel efficiency while increasing black smoke?