Just back from dyno, good power but REAL RICH

[Nosjunke]

I went to a local car show today and they had a mobile dyno, so I wanted to see how the talon was running, and paid the money to check it out. I got three runs with A/F. Below is my chart. My car is stock except for the MAS little honey comb hack and backed out the plastic screw. I also cut my airbox open so the K&N can breath a little better. Oh, I also took out the silencer. If you can't read the chart my runs were as follows:
1st: Max power 192.0 max torque 187.2
2nd: 185.5 178.4
3rd: 180.2 171.6

So I'm pleased considering I've got over 150,000 miles, and other than a new set of plugs, fresh oil change, and thermostat that's all that done.

So my question is, can I adjust my A/F without and S-AFC or similar device? I want to lean it out a little. You can see by the graph that once I got on, the A/F chart went south. Although I still made power, I think I may have made more if I was a little more lean. I picked up over 25hp and 15torque on my old supercharged mustang, but I had an adjustable fuel pressure regulator, and we just turned it a 1/4 turn until it leaned out right. If you need to know, I run only 93 octane fuel and the car is a 94 Talon TSI FWD 5spd

 

[kpt4321]

It looks like your A/F ratio drops to around 10:1. That's pretty normal for a stock DSM, and that's really also ok. I wouldn't worry about it too much.

Those are good numers for a stock DSM, congrats.

 

[Violater101]

Good #'s

 

[Frontwheeler]

Good run,

Man, if your car is putting down numbers like that stock, wait till you start modding that thing.

 

[GSXpower]

To answer your question for future refrence, there is a way to alter your a/f ratio. On the bottom side of your MAFS, there is a plastic screw with some silicone over it. You can scrape off the goo, and turn the screw out for leaner, or in for richer. What it does is let more or less un-metered air past the MAS.

 

[Nosjunke]

Hmmm....Okay, I'll remember that next time I tear into it.
Thanks