[GTBeginner]

I Just put a vortech supercharger that is running 9 lbs of boost on my '02 GT, and I can't seem to get the tune right with my Special Forces tuner. Does anyone have any experience with this tuner, or any advice on the timing or the fuel curve adjustments?

[EagleAutosports]

I'm not familiar with that particular tuner, but I know on a blown engine you want to get as close as possible to an 11.5:1 air/fuel ratio. You'd have to fatten up the fuel and cut back on the timing a bit. You should be able to monitor the a/f on there.

[GTRaptor]

Reduce your timing around 7°, but only where you have BOOST, this is a tricky part since boost only builds on certain LOAD and RPM conditions (throttle applied - rpms).

The same applies for fuel.

Think of your map fuel and timing maps as something like this:

RPMS -------------------->>>
LOAD
|
|
|
V

Think of load as the Volumetric efficiency (air in the engine)
A supercharged car has a VE>100% (when there is boost)
So the trick is to add fuel and reduce timing where VE starting at around 85% and above.

Some chips do give you more control than others, in your case i wouldnt know though.

Also important is being able to measure your AF, but more important is your EGT (gas temperatures), with both you can tell not only if its rich or lean but also if there is too much or little timing. Too little timing increases EGTs which are killer to engine components.

Good luck.