Tuning your own car?

[Race94]

People charge a pretty good amount for tuning a car so i was wondering if people here tuned their own cars?

As i understand you go to a dyno and make a run, then check your A/F ratio and try to adjust it to have an optimal ratio

I can't understand a few things tough, how do you do this at an S-AFC, also what ratio are you aiming at?

Can someone for example post a dyno chart and explain to me what you would do with an S-AFC regarding the chart and whatnot, just to see if i can understand this.

Also what's the logger for? to avoid dyno trips?

 

[IHeartTurbo]

People charge a pretty good amount for tuning a car so i was wondering if people here tuned their own cars?

yup Don't even need a dyno to do it.

As i understand you go to a dyno and make a run, then check your A/F ratio and try to adjust it to have an optimal ratio

I can't understand a few things tough, how do you do this at an S-AFC, also what ratio are you aiming at?

Can someone for example post a dyno chart and explain to me what you would do with an S-AFC regarding the chart and whatnot, just to see if i can understand this.

Just getting an a/f gauge isn't gonna do you shit for tuning, unless you have a wideband o2 sensor. You're gonna need some way to log. Whatever tuning device you get will come with instructions on how to tune with it. I don't know how with an safc, as I don't have one, but I konw how with the GM MAFT, it's essentially the same. On the MAFT, you go for a cruise, logging certain data, and make adjustments to the base knob until it's where you want it, not running too lean or too rich. Then you do a couple short pulls, read your data and adjust the mid knob. Then you do some WOT pulls, log, and adjust the WOT knob. It's pretty easy to do once you understand it all.

Also what's the logger for? to avoid dyno trips?

It reads the data from the ecu, such as fuel trims, a/f ratio, o2 volts, injector pulse width, etc. Check this out - www.pocketlogger.com You're gonna need it whether you are tuning on the dyno or on the highway.