3.3TT Map 3 Log-Check

[celebrate333]

Hi, currently wondering how Map 3 settings compare to my current fuel mix: does it appear to be slightly too aggressive (ethanol content at local pump indicates large deviations), and would a different map w/ the same fuel be safer + more optimal?

My main issue here would be the high Ign Adv. readings @ low RPM, coupled with the relatively large difference when under load, that I'm getting from my Map 3 log. Boost #s also seem a bit higher than what I'm seeing on other members' also on Map 3. To my noob self, trims and AFR seem ok; and am supplying fuel pressure readings to see if I actually have the issues reversed. Hoping to have this behavior explained to get a better picture of the causative processes. Attached is the Map 3 log from a 3rd gear pull. can supply more info and logs, if needed. Thanks!

Run: plugs gapped to 0.02, CAI, supposedly ~96 octane.

 

[AWDGT2]

Can't do much with this capture...
1. You should attach the csv file
2. Avg ign isn't enough to go off of, we need to see the rest of the ign 2-6, see #1.
3. If you truly gapped at .02 instead of .022-.026 your probably too close

Ign will be high before a WOT... normal. It will drop and slowly climb as boost slowly drops. Seeing 20psi on map3 with high octane is not abnormal, 6psi over ECU 13ish+ puts it right there. Again, csv file will help.

 

[celebrate333]

My mistake! Also, specific gap is 0.022; sorry for the oversight in communication-- here is .csv

 

[AWDGT2]

Very short log... 2 things.
1. Multiple gears is always better, it shows how the throttle reacts to the shift and the WGDC is functioning.
2. You were only at WOT for under a split second, by the end of the pull you were at 52% pedal. You have to hold it WOT, part throttle doesn't give us much to go off of.
Other than that Timing, AFR, and, Trims looked OK.

 

[celebrate333]

Thanks for the advice and input; trying to get a feel for it all. Verified ‘ok’ is something I can come to nuance. I'll attempt getting a more controlled-for and holistic log --for the sake of conclusiveness-- (& probably on a better-fit testing area),later on.

Is it correct to assume: the very high timing before WOT is just relative to the fuel needed for operation on this map, esp. towards the upper-end of the load spectrum?

 

[celebrate333]

Also, excuse the dumb question: what places/inconsistencies should one look to induce an ideal octane range for the map (both in terms of calling less/more fuel demand)?

iirc timing retardation could happen if low octane/knock is picked up, and low octane issues r indicated if any of ign_1-6 (1) consistently keeps being pulled @ certain points while RPM increases, or (2) if one of the readings lays low in between gear shifts.

so then if higher octanes r represented in more ign adv: could less efficiency from an un-optimized ign_timing for higher octanes be indicated by these logs? aka is there any way to understand what the optimal delta ign adv would b when coming into WOT? perhaps, in terms of patterns throughout the RPM range or ign_1-6 fluctuations between gear shifts?

ofc assuming fuel injectors match the fuel, too. considering oem fuel injectors, one would probably have to look out for lean AFRs and FP_H for dangerous fuel demand signs, as well, right?

 

[AWDGT2]

The Spike I imagine on the initial WOT pull is probably an anomaly, I see it in my logs and everyone else's. You're asking the App and the JB to do a lot in milliseconds to capture that. It's nothing to be concerned about but Terry might be able to chime in. 100's if not 1000's of numbers are being thrown once the WOT starts recording and until things start settling, what comes before that is not worthy of dissecting. BMS always tries to shoot for 11.9 ARF, it's dynamic so it has to adjust constantly in just split seconds. You will see it hit that goal as the WOT pull progresses. The biggest thing on Timing and Ign is watching 2-6. If there are variances that spread over 3.5 degrees between those cylinders then you probably have octane issues or plugs not gaped properly. Trims should start around 40ish then taper down to low 20's. If they are not, or there's are huge difference between Trim1 and trim2 then the fuel wires are not installed correctly or there is a bad connection. The bigger the variances between 2-6 the worst the Oct, or you need to step down a Map. Keep in mind Ign1 and the rest are sampled from different locations so they will never follow the same line. High pressure fuel should hang around 10, if it gets below 7 it will crash and close your throttle but that rarely happens unless you are running an VERY aggressive tune in Map6, or you run too Heavy E85. If you're looking for trends or pattern, As boost goes up, timing drops, as boost drops, timing goes up. Sort of an egg shape in your log and you have that now.

 

[celebrate333]

The Spike I imagine on the initial WOT pull is probably an anomaly, I see it in my logs and everyone else's. You're asking the App and the JB to do a lot in milliseconds to capture that. It's nothing to be concerned about but Terry might be able to chime in. 100's if not 1000's of numbers are being thrown once the WOT starts recording and until things start settling, what comes before that is not worthy of dissecting. BMS always tries to shoot for 11.9 ARF, it's dynamic so it has to adjust constantly in just split seconds. You will see it hit that goal as the WOT pull progresses. The biggest thing on Timing and Ign is watching 2-6. If there are variances that spread over 3.5 degrees between those cylinders then you probably have octane issues or plugs not gaped properly. Trims should start around 40ish then taper down to low 20's. If they are not, or there's are huge difference between Trim1 and trim2 then the fuel wires are not installed correctly or there is a bad connection. The bigger the variances between 2-6 the worst the Oct, or you need to step down a Map. Keep in mind Ign1 and the rest are sampled from different locations so they will never follow the same line. High pressure fuel should hang around 10, if it gets below 7 it will crash and close your throttle but that rarely happens unless you are running an VERY aggressive tune in Map6, or you run too Heavy E85. If you're looking for trends or pattern, As boost goes up, timing drops, as boost drops, timing goes up. Sort of an egg shape in your log and you have that now.

Thanks so much for the thorough write up . Still obv have much to research and naturalize on my part, but your helping out cleared up my q’s and is very appreciated