Ok, to rehash the details: 05 MR with K&N panel filter and S-AFC. I'm using a basic Palm m100 and Palm'n'Stein to datalog.

Temp 69, Humidity 62%, all 3rd gear pulls, 93 octane, TPS 99 throughout

Pull 1: Pull 2: Pull 3:

RPM---02v--Tmng--RPM---02v--Tmng--RPM---02v--Tmng
3082--.91---6-------3027--.85---17-----2964---.87---7
------------------------3203--.89---10-----3199---.89---5
3406--.93---3-------3472--.89---6-------3535---.91---3
3765--.93---3-------3828--.91---4-------3875---.91---7
4132--.91---8-------4222--.91---8-------4257---.91---7
4546--.93---9-------4585--.89---8-------4628---.91---8
4910--.93---10------4953--.91---9-------4988---.91---9
5246--.93---10------5355--.91---9-------5343---.91---8
5625--.93---10------5722--.91---12-----5699---.91---11
5941--.93---14------6062--.91---14-----6035---.91---15
6285--.93---18------6398--.91---17-----6371---.91---18
6625--.93---21------6734--.91---17-----6691---.91---19
6937--.93---20------6988--.93---19-----6988---.91---19
7203--.93---21------7261--.93---19-----7261---.93---20
Karman--1626------------------1595-------------------N/A

My mistake was in not writing down the initial settings so that I could more easily remember the slight changes I made between each run. I was on my way to work, so I wasn't fully prepared, and it's hard for me to get 3rd gear pulls safely, so I just had to take my opportunities when they arose. The good thing is that I was only making 1% changes between runs, so we're not talking drastic changes. From these logs, I would guess that ANY of them are acceptable, but I'd like some input on what you think is best.

Pull 1: This first log looks great from an O2 perspective, since it's at .93v the whole time I'm in boost, but the Timing is kinda weird, because it starts flat (8-10 for 1500rpm), then jumps up really fast (10-21 in 1k rpm).

Pull 2: All i did was lean it out by 1% at 5k rpm in hopes that the O2 would stay where it is while the timing would increase from 10 to 12 to 14 instead of 10 10 10 14. Instead, I ended up with a lot of .91vs, but the Timing advance is very nice and smooth, plus it maxes out at 19 like it's supposed. I was flowing less air (max) as you can see by the max Karman reading, and the pull felt slower, so I dunno. Remember that this run was not too long after the first run, which was done right after the car warmed up. I'm not sure how much effect this had on the 2nd run, which was after 30mins of highway driving.

Pull 3: On this one, I tried to correct the .91v (not dangerous, but not optimum either) by adding 1% fuel to every setting from 3500-6500 (3.5, 4, 4.5, 5, 5.5, 6, 6.5). This one has amazingly consistent O2 readings, but unfortunately, they are all .91 instead of .93. This may not be a problem, but I was kinda hoping for .93 to be safe. If I'm not mistaken, .91v isn't unsafe, but I wouldn't want to go any lower. The timing curve is very nice, and my richening at 3500 seems to give me an early jumpstart with 7 timing at 3875 rpm, but then there is a single dip at 5343. Maybe I need to add 1% more fuel here to smooth the timing curve, since it's knocking slightly? There's also another big 4-pt jump from 5700-6000rpm, but the rest is very smooth and maxes out at 20 without dipping again, which is great.

Thoughts?

 

What AFRs are you assuming those narrow band O2 readings equate to? I haven't compared factory O2 readings to wideband readings on my Evo (I could, just haven't), but on my Camaro I'm pretty sure that my factory O2s are in the 900s and I tuned that car (naturally aspirated) into the 12.5:1 range using a wideband, so .91 or even .93 sounds pretty lean to me. Do you know what the readings were with the SAFC zeroed out?

 

11.5-11.8. .92-.94 is the ideal tuning range for these cars. I thought that was common knowledge, but maybe not for those who don't come from DSM roots. I plan to dyno the car with these settings to make sure that the power is there and that the AFR is where I think it is. It would be nice if I found someone local with a wideband logger, though.

 

u do that blue wire mod or is that log from a wideband?

good consistancy and smoothness on the 3rd pull.

I really can't wait until i get my logger.

 

No, I made sure not to do the blue wire mod. The log is from my pocketlogger: Palm M100 with Palm'N'Stein software, so it's just narrowband.

 

you tell them [QUOTE=Warrtalon] I thought that was common knowledge, but maybe not for those who don't come from DSM roots.

 

on a friends car with a wideband and pocketlogger,

11.7 = 0.92 o2's
12.0 = 0.90 o2's

we tuned for 92's all across, just like dsm's
car runs very smooth, it was 96 98 before the tune. On a flash (cough cough)

 

Wow, that is excellent data to know. Thanks for sharing...

My 12.83@106.3 read .95-.97 across the spectrum in every gear despite my negative S-AFC settings, so maybe I have more power to gain. I'd rather not keep leaning it out without wideband, though (only have a pocketlogger).

Very interesting that the flash was rich (not surprising, though) and that .90 hurt you, too. .3s can be driver error, though, so can you share the MPH of those runs?

 

this is some great info......my PLX R-500 is on it's way so i can tune my AFC.....i can't wait to play

 

I can't wait to hear all about it.

 

[QUOTE=EVOLUTIONIZE]



it was 96 98 before the tune. On a flash (cough cough)

 

[QUOTE=EVIL MR]
My car was flashed also, and before SAFC i was getting almost 0.98's all across, i know they say their flashes run rich just to be safe but thats way too rich IMO., at 98 o2's my spark plugs will be wasted by the 4th week . 0.92 seems to be the sweet spot as that ended up being an 11.7 afr that was on 93 octane BTW. I have the same settings in my FILE 2 by 2% richer just for the day time with my night settings on a hot day i see 0.88 0.89 so i had to use file 2 for daytime settings, hope that helps

 

With stock boost levels based on your karman reading 11.5-11.7 seem ok.
Timing is strong, low humidity is good.

Higher boost levels I would shoot for 11.5's or knock retard threshold.

I currently run about 11.3's w/ 1951hz. I think that is about all the turbo can do with the current mods.

 

I tune for about 11.3-11.4 on my wideband. That shows as ~.94v on the factory O2s. Very low 11s show as .96. My timing maxes out at about 19 degrees using a Dynoflash mail-in tune.

 

So why the huge timing hit from 3400 to 5200rpm? Knocking perhaps. I find this interesting as my custom dyno tune by Al, I am running either 10:1 a/f or below from 3.5k rpms to 5.5k rpms, which is pretty much the exact same range where there appears to be some knock on your car....unless that is how the factory ecu runs timing. I am planning on getting an S-AFC 2 to correct this problem and just lean her out to a still safe 11.0:1 in that little area.