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Discussion Starter · #1 ·
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?
 

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2964 .87 7
3199 .89 5
3535 .91 3
3875 .91 7
4257 .91 7
4628 .91 8
4988 .91 9
5343 .91 8
5699 .91 11
6035 .91 15
6371 .91 18
6691 .91 19
6988 .91 19
7261 .93 20

I think this last one looks good. Add a little at 5300 and you should be staright. :thumb:
Your .91 voltage should be fine since your on 93 octane. Do you regularly run 93 oct.? The higher the octane, the lower voltage you can get away with. The .93 volatge guideline is mainly for us Californians who get the watered down, "lite," sorry a$$, 91 octane.
 

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Discussion Starter · #3 ·
turbolarry said:
I think this last one looks good. Add a little at 5300 and your staright. :thumb:
Your .91 voltage should be fine since your on 93 octane. Do you regularly run 93 oct.? The higher the octane, the lower voltage you can get away with. The .93 volatge guideline is mainly for us Californians who get the watered down, "lite," sorry a$$, 91 octane.
Yes, I run 93 always. The only other octane I'd run would be a mix of 93 and whatever octane I can get at the track (rare).

Looks like I'm dialed in nicely...now to find out if it makes any difference in MPH in the 1/4.
 
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