Ignition timing question

[Alexiskayak_7]

I've started to burn a few eproms and check the behavior of the PY unit.
I burned a chip and i added ignition timing (about 5-6 degrees) @ cruise loads, without adding fuel.
The afr was still 14.7-15 at part throttle, but i noticed that my fuel consumption has increased.
My question is why it has increased and afr stayed at the same numbers?
 

[Yoof]

How are you measuring fuel consumption, average over a tank?

[Andy]

Have you had a timing light on it to be sure you've actually added advance?

[Alexiskayak_7]

@Yoof: Yes

@Andy: I haven't checked it, i'll do it, but it feels much better at cruise speeds

[petegt]

I have been wanting to do this on my gt to take full advantage of high octane fuel hope you get this sorted and maybe could help me 

[Alexiskayak_7]

Why don't you try? Increase ignition step by step, always keep afr at safe numbers, go for a ride or get your gt to a dyno. You will understand a lot of things by seeing the dyno graph

[petegt]

I replied to your pm. Im just getting started with this I have downloaded tunerpro, winols and have an eprom read/writer + electronically erasable 27sf512 eproms in the post 

[Alexiskayak_7]

Have you had a timing light on it to be sure you've actually added advance?

Andy, yes it does.
I am unplugging the lamda sensor and i am emulating
Andy, how far can i go, tuning the ignition timing ,map and runing on stock motor, boost and 95oct fuel?
Can you give please an idea here?


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6502   35.9   35.9   39.8   39.8   40.9   40.9   35.9   35.9   35.9   30.7   24.0   24.3   18.0   16.9   16.9   16.9
5901   35.9   35.9   40.9   40.9   40.9   38.7   35.9   35.9   37.0   31.0   25.7   25.0   18.4   18.0   18.0   18.0
5300   35.9   35.9   40.9   40.9   40.9   38.7   35.9   35.9   34.9   30.0   25.0   21.9   19.8   19.8   18.0   18.0
4701   35.9   35.9   40.9   40.9   40.9   37.0   35.9   32.8   30.0   28.9   22.9   20.8   19.8   19.8   18.0   18.0
4101   35.9   35.9   40.9   40.9   38.7   34.9   34.9   32.8   32.1   28.9   22.9   19.8   18.7   16.9   16.9   16.9
3501   31.0   31.0   35.9   34.9   32.8   27.8   26.8   25.0   27.8   30.0   22.9   18.7   16.9   14.8   14.8   14.8
2900   31.0   31.0   35.9   34.9   32.1   27.8   26.8   22.9   25.7   24.0   19.8   18.7   15.9   14.8   14.8   14.8
2500   27.8   27.8   27.8   27.8   27.8   25.7   25.7   20.8   22.9   24.0   18.7   18.0   15.9   15.9   15.9   15.9
2100   25.7   25.7   25.7   21.9   26.8   20.8   20.8   20.8   19.8   18.0   16.9   12.7   12.7   12.7   12.7   12.7
1700   21.9   21.9   21.9   21.9   24.0   20.8   18.0   15.9   19.8   15.9   12.0   12.0   12.0   12.0   12.0   12.0
1300   12.0   12.0   12.0   12.0   16.9   14.8   16.9   12.0   12.0   9.9   6.0   6.0   6.0   6.0   6.0   6.0
1100   3.9   3.9   3.9   3.9   7.8   14.8   11.0   6.8   12.0   8.9   6.0   6.0   6.0   6.0   6.0   6.0
900   1.8   1.8   1.8   1.8   6.0   9.9   15.9   12.7   9.9   3.9   3.9   3.9   3.9   3.9   3.9   3.9
700   6.0   6.0   6.0   6.0   6.0   11.0   11.0   7.8   7.8   3.9   3.9   3.9   3.9   3.9   3.9   3.9
500   6.0   6.0   6.0   6.0   6.0   11.0   11.0   7.8   7.8   3.9   3.9   3.9   3.9   3.9   3.9   3.9
300   6.0   6.0   6.0   6.0   6.0   11.0   11.0   7.8   7.8   3.9   3.9   3.9   3.9   3.9   3.9   3.9