what NOT to do when tuning.. spreadsheet inside

[blcknspo0ln]

my first SAFC settings were pretty good with 16* timing advance at 5800 rpms.. i decided to skip a couple notches on the SAFC to lean it out and this is what happens car pulls, but not nearly as hard as it was. DO NOT tune in increments of 4%...

and the moral of the story is to NOT tune that SAFC without a logger. I could have leaned out my motor and blew it up before I knew it if I hadn't checked my logger tonight the bottom one is the settings I currently have and will be logging tomorrow. needless to say they're 2-4% richer.


.05.12.05

1k 2k 2.6k 3k 3.6k 4k 4.6k 5k 5.6k 6k 6.6k 7k
LO:
-12 -12 -12 -12 -12 -12 -12 -12 -12 -12 -12 -12
HI:
-25 -25 -25 -25 -27 -29 -29 -29 -29 -29 -29 -29

RPM o2 Volt. Timing *
3196 0.93 8
3332 0.95 7
3500 0.95 7
3716 0.95 9
3872 0.95 10
4084 0.95 9
4252 0.95 10
4420 0.95 10
4624 0.97 10
4800 0.97 10
4992 0.97 11
5104 0.97 13
5200 0.97 14
5476 0.97 14
5588 0.97 14
5808 0.97 16

05.16.05

1k 2k 2.6k 3k 3.6k 4k 4.6k 5k 5.6k 6k 6.6k 7k
LO:
-15 -15 -15 -15 -15 -15 -15 -15 -15 -15 -15 -15
HI:
-27 -27 -27 -29 -31 -33 -34 -35 -34 -32 -32 -32

RPM o2 Volt. Timing *
3872 0.93 9
4088 0.91 6
4340 0.91 7
4580 0.91 8
4804 0.93 9
5044 0.91 9
5260 0.91 9
5516 0.91 9
5696 0.91 7
5896 0.91 8
6056 0.91 9
6284 0.91 7
6400 0.91 9

1k 2k 2.6k 3k 3.6k 4k 4.6k 5k 5.6k 6k 6.6k 7k
LO:
-15 -15 -15 -15 -15 -15 -15 -15 -15 -15 -15 -15
HI:
-27 -27 -27 -29 -30 -31 -31 -32 -31 -30 -30 -30

RPM o2 Volt. Timing *

 

[Dan-TSS]

-Sorta the same reason why you shouldn't Jump out of plane at high altitude w/o a parachute.
OR
-Kinda why you shouldn't drive at night w/o no headlights.

*I'm glad you figured it out......common sense in my book.

 

[blcknspo0ln]

I think you missed my point. I obviously know the effects of tuning, but my main point was to forewarn those who are NEW to tuning.. and to make them aware that leaning 4% can cause MANY problems..