Cypher2k

Timing pull like a MF and throttle cut.

With the car fresh, i could manage 3rd gear and half of 4rth before the car would cut out and fire flames out the back.

took some logs. 15 degrees of CF on cylinder 5

and on the "clean" runs, 12-13 degrees of pull.


Id say the new cams, combined with the higher boost are proving too much for this file that was tuned to the edge with a nice boost taper from 20psi to 15 at redline.


It was a chilly night too. Not like driving around in the heat or anything.

here are the logs:

run 1
-1.5 degrees of timing, 3rd and 4rth gear.
Sunday 14 May 2006 1:57:47
8D0 907 551 H 2.7l V6/5VT G04 0002

Group A: '020 Group B: '021 Group C: '006
Cyl 1 Cyl 2 Cyl 3 Cyl 4 Cyl 5 Cyl 6 Bin. Bits Bin. Bits Engine speed Engine load Intake air temp Altitud Corr Factr
TIME TIME -50.2 TIME -50.2
MARKER STAMP CF CF CF CF STAMP CF CF STAMP /min % °C %
0.3 2.3 2.3 0 3.8 0.71 5.3 4.5 1.1 3640 191.7 27 -1.6
1.5 11.3 15 7.5 8.3 1.91 14.3 12 2.33 4320 191.7 29 -1.6
2.75 10.5 14.3 7.5 8.3 3.17 14.3 11.3 3.62 5000 191.7 33 -1.6
4.07 9.8 13.5 6.8 7.5 4.53 13.5 10.5 5 5560 191.7 39 -1.6
5.48 9.8 13.5 6.8 7.5 5.96 12.8 10.5 6.45 6080 182 45 -1.6
6.94 9 12.8 6 6.8 7.31 12.8 9.8 7.77 5040 113.5 45 -1.6
8.2 12 12 13.5 13.5 8.64 0 0 9.07 4160 9 45 -1.6
9.46 0 0 0 0 9.86 0 0 10.27 1880 11.3 44 -1.6
10.67 0 0 0 0 11.06 0 0 11.46 1080 24.1 40 -1.6
11.88 0 0 0 0 12.27 0 0 12.68 960 25.6 38 -1.6


Second run, -6 degrees 3rd gear only. but already heatsoaked i guess despite a couple minutes of cooldown.

Sunday 14 May 2006 2:03:07
8D0 907 551 H 2.7l V6/5VT G04 0002

Group A: '020 Group B: '021 Group C: '002
Cyl 1 Cyl 2 Cyl 3 Cyl 4 Cyl 5 Cyl 6 Bin. Bits Bin. Bits Engine speed Engine load Injection time Mass air flow
TIME TIME TIME 80-105C 2-5/1.6-5ms 2.8-5.6/10-15g/s
MARKER STAMP CF CF CF CF STAMP CF CF STAMP /min % ms g/s
0.78 0 0 0 0 0 0 0 0.38 3520 69.2 4.76 72.28
1.99 11.3 11.3 10.5 13.5 1.19 15 11.3 1.58 3960 191.7 21.42 228.61
3.25 11.3 11.3 9.8 12.8 2.41 15 13.5 2.82 4520 191.7 30.6 281.72
4.59 10.5 10.5 9.8 12.8 3.69 14.3 12.8 4.14 5080 191.7 40.8 287.25
6 9.8 9.8 9 12 5.05 14.3 12.8 5.52 5480 188 65.62 288.69
7.37 0 0 0 0 6.45 13.5 12 6.91 5360 14.3 2.38 18.75
8.61 0 0 0 0 7.8 0 0 8.21 3680 10.5 0 11.61
--------


The first run didnt catch the 15degrees of timing pull but the second did. Blame my ancient copy of vagcom.

Whats puzzling was that pulling timing out with lemmiwinks seemed to have NO effect on WOT.

Can anyone confirm?

Cypher2k

sorry the data is a bit hard to read...

mbox

I generally pull 1 degree for every CF over 10 just to get it in the green. Once it drops < 10, add as needed. Wash, Rinse, Repeat.

Cypher2k

you are talking about pulling over 12 degrees with lemmiwinks at this point. thats a hell of a lot.

Ochlockonee

My car in daily driver pump gas trim has CFs of around 2-6 at WOT. I drained the tank until the fuel pump wouldn't pump anything else out and put in some leaded 117 motor octane gas. I took my car out for some quick logging to verify it would be safe to add timing. To my suprise my CFs were identical. I took it out again and did a 3rd-4th gear pull to redline. In 3rd the CFs still hadn't changed, but after pulling in 4th they slowly kept creeping down until redline.

I have to conclude that CFs are "learned" by the ECU a little more than I had once thought. The ECU can probably give CFs instantly, but it taketh away the CFs after a little more thought. Moral: clear the codes after pulling timing or adding octane.

mbox

i really don't care if you do it or not.

mbox

I've noticed this on almost every occasion. CF's are generally always lower and the second and third pulls indicating to me that they are, in fact, learned.

Cypher2k

that could be why the second pull with an additional 5 degrees pulled did no better.

Mike2kS4

I noted this back when I was K03/X and a nearby gas station sold 100oct. The midget gnawed on my ankles on that one like crazy until other people confirmed it.

Captain Matt, I be

do you happen to have a wideband? i'd be interested to see what your AFR looks like up top