the S-AFC tuning thread, tuning the 6GC Options

[ghostdog]

Hey guys. I got my S-AFC 2 installed and I know several other people have them as well. I know some of you must have some good settings so lets share the knowledge and see how much we can get out of our respective engines.

Here are some links I've found that talk about tuning:

http://www.roadraceengineering.com/newafcsetting.htm
http://www.10south.net/~mprobins/eclipse/3gfaq.html
http://www.saturnspeed.com/hardcore_tech/s.../safc_setup.htm

Note: as we all know the safc should be tuned by a trained professional for optimum performance, however it doesn't hurt to experiment. so lets share the knowledge and see where it takes us.

[SpedToe169]

I'm in cali right now so I can't give you exactly what my map is but it really looks pretty similar to sikboys. All of my tuning was guesswork using a ****ty o2 sensor but it seems to work ok. Like you all know, it has to be done on the dyno with a wideband to be done correctly. It should be realitively easy to do it in like 45 min and will cost less than $100 if you come prepared.

The stock 7a map does seem to be really rich, so leaning it out gives gains, but be careful and don't go too far. Anything past about -20% and you're asking for trouble. I didn't mess with the low throttle map at all but if I had it to do over I'd probably lean the whole thing out about 20% and see how it looks on the wideband. The idea behind that being fuel economy. Low throttle really won't effect much. The throttle points seem a little weird on sickboys map...the SAFC interpolates between them so to use it to its max effectiveness the points should be farther apart. Mine are 30% and 70%. This basically allows you to make a crude 3d map based on throttle position, and rpm, instead of just rpm (like sikboys map).

All that being said...GO TO THE DYNO!! Its worthwhile for the power you get out of it and what you'll learn. Make sure they have a wideband o2 sensor, sometimes they charge a little more for this but its worth it. Just as an example...we were tuning the World-Challenge cars the other day and had an exhaust leak where the header collector and exhaust meet. The o2 sensor was located downstream of this point and the leak was pulling fresh air in and throwing the sensor off. We completely mapped the car and were really disappointed with the results. We went back the next day after discovering the problem and made 10 more hp with a correct map in the car. The difference in the 2 maps wasn't very big.

Oh and if you're really creative and ambitious, play with intake length while you're there. We've found a LOT of power in having the correct tuned length intake.