LS1_USER

TPS RPM KR Timadv A/F Clnt IAT

20.3 1262 0.0 21.0 14.6 201 106
25.8 1583 0.0 24.0 14.6 201 106
30.5 1931 0.0 25.0 14.6 201 106
39.1 2328 0.0 26.5 14.6 201 106
81.6 2816 0.0 19.5 14.6 203 106
99.6 3329 0.0 19.0 11.9 203 106
99.6 3863 0.0 20.5 11.8 203 106
99.6 4397 0.0 20.0 11.7 203 104
99.6 4884 0.3 21.0 11.7 203 104
99.6 5352 0.2 21.0 11.6 203 104
99.6 5794 0.1 22.5 11.5 203 104
99.6 6198 0.1 24.0 11.4 203 104
25.4 6206 0.0 25.5 11.4 203 104
00.0 5418 0.0 10.0 14.6 205 104
28.1 4062 0.0 12.0 14.6 205 104
99.6 4603 0.0 22.0 11.7 205 104
99.6 4796 0.0 20.5 11.7 205 104
99.6 5033 0.0 21.0 11.7 205 102
99.6 5270 0.0 21.5 11.6 205 102
99.6 5497 0.0 22.0 11.5 205 102
99.6 5695 0.0 23.5 11.4 205 102
99.6 5887 0.0 24.0 11.4 205 102
99.6 6075 0.0 24.0 11.4 205 102
99.6 6029 0.0 25.5 11.4 205 100

Here we have a 1st and 2nd gear WOT run for a 2002 M6, with a little granny shift in between. I'm thinking that the timing advance is a little low and that the A/F is a little rich. Any help would be appreciated.

KGSloan

your timing does seem a little low. however, from what i've heard, the 2002's have less timing from the factory. you car is about the same as my car was before i got it tuned

jimmyblue

iTrader: (11)

You should log O2 mV, not AFR, since AFR is either
a computation with "mystery constants" or the
"commanded" AFR. Not To Be Trusted.

IAT is a little warm, some form of cold air would
be a bonus.

LS1_USER

OK...I logged the O2s on a 3rd gear run in some cooler air. This was in 75 degree air, so the stock IAT is just a few degrees above ambient...on the highway, anyway.


RPM TPS B2S1 B1S1 adv Clnt IAT
2536 99.6 915 910 17.0 198 82
2704 99.6 905 930 17.0 198 82
2863 99.6 910 915 17.5 198 82
3036 99.6 915 920 18.0 198 82
3198 99.6 905 920 18.0 198 82
3373 99.6 915 910 19.0 198 82
3542 99.6 905 920 18.5 198 82
3709 99.6 920 925 18.5 198 82
3876 99.6 920 925 18.5 198 82
4068 99.6 905 920 19.5 198 82
4252 99.6 910 925 20.0 198 81
4408 99.6 905 920 20.5 198 81
4580 99.6 905 905 20.5 198 81
4739 99.6 910 915 20.5 198 81
4912 99.6 910 920 21.0 198 81
5078 99.6 905 905 21.5 198 81
5241 99.6 915 915 22.0 198 81
5397 99.6 910 915 22.5 199 81
5532 99.6 910 910 23.0 199 81
5659 99.6 910 920 24.0 199 81
5802 99.6 900 910 24.5 199 81
5937 99.6 905 900 25.0 199 81
6059 99.6 895 900 25.5 199 81
6156 99.6 905 905 25.5 199 81

I'm looking for about 3 more degrees of timing. How can I get some more timing out of this thing without using something like LS1 edit or an HPP? Will a MAFT and a cooler thermo help me do this?

How's that fuel looking? Thanks guys...

jimmyblue

iTrader: (11)

Fuel looks dead-nuts on (as well as can be told,
from a standard O2).

As far as I know, the only way to fool timing
forward without a programmer (HPP3, Predator)
or laptop & software (LS1-Edit) is the IAT
"timing tricker" resistor mod or its uptown
sister, the thing that SLP sells. This puts
you more at the mercy of ambient conditions, if
you did get too warm an inlet air stream the
IAT would not correct for it. But I think in
your case, with good looking fuel, it's worth
a 39-cent try.

MAFT will only affect timing as a byproduct of
false airflow reporting. This would take your
fuel from a good place to a bad place, in order
to get that spark. Bad trade, sez I.

Cooler 'stat will let you tolerate more spark
and less fuel. But, until you bump up against
spark / KR limits, a hotter 'stat gives you
more efficiency without costing you significant
power. You do not have the cylinder pressures
(power level) th run into that problem yet,
from the looks of things, so a colder 'stat
may actually cost you power (efficiency is
a power term, too - only when your mods stuff
the cylinder more, you may gain ultimately from
trading efficiency for absence-of-knock).