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View Full Version : 100 octane tune w/Safc2 and MBC



SJCoruja
04-05-2006, 05:08 PM
I am finally ready to try working on my 100 octane tune. I will be eventually dynoing it and having Mike fine-tune my settings, but really want to try to learn more and see what I can come up with before taking it in. I have spent the last 4 days doing constant logging to get the hang of it and make sure I had a solid base to start from. All my values seem to be in odd numbers, and my TPS reads at 99% at WOT. My most recent pull was today at lunch, but this is pretty consistent with the last few days. My MBC is set currently at 20psi. (spikes at 21.5psi)

RPM O2v Timing
2574 89 5
2796 89 2
3039 91 1
3316 91 2
3605 91 3
3882 93 3
4203 93 4
4492 93 4
4796 93 6
5082 93 7
5378 93 7
5648 93 9
5902 93 10
6167 93 12
6421 93 13
6667 93 16
6886 91 17
7101 93 17
7308 93 19
7500 93 20


My thoughts are to richen up the 2.8k to 3.8 range to make sure I don't get knock when I turn the boost up a bit. So, am I right to shoot for 0.89v on the O2 and maybe go up to 22/23 psi on pure 100 octane? If no, what rough #s should I aim for?

earlyapex
04-05-2006, 05:46 PM
So this log is with just your ecutek tune? No safc changes? Is this log with 100 octane or 91 octane?

Where you able to up your sample rate from the pocketlogger?

Also, post your mods again.

evoredy
04-05-2006, 05:57 PM
just some thoughts, let me know if they are obsolete,

looking at your chart, i can't tell much because I'm not familiar with the EVO's voltage readings. according to your numbers, you are running rich, right?. i think you'll still be running rich with 100 octane and at boost levels at 22/23ish psi (rough guesstimate).

To get a better tune, you should opt for a good EGT probe/gauge because tuning with the AFC is best when you know that your hot exhaust runner is not going over 1600 F MAX. (1600 points straight down on mine lol)

i guess you can cross-ref some readings and figure out what you think is best for your vehicle and mod-package.

can you post your AFC hi/low injector correction map and NE points and mods?

oh yeah, about the TPS, if you push hard on the pedal it should read 100.

SJCoruja
04-05-2006, 07:15 PM
So this log is with just your ecutek tune? No safc changes? Is this log with 100 octane or 91 octane?

Where you able to up your sample rate from the pocketlogger?

Also, post your mods again.

This log is with 91 octane with a couple 1% changes. I will head back out in a few minutes and get the settings/nepoints. I figured out that I actually don't have "pocketlogger", but it is the Tunerstein software so no way to up the sample rate. Mods are 264/272 cams, 720cc injectors, fuel pump, TBE w/Helix HFC, Evo IX turbo, Ecutek flash.

evoredy
04-05-2006, 11:15 PM
So this log is with just your ecutek tune? No safc changes? Is this log with 100 octane or 91 octane?

Where you able to up your sample rate from the pocketlogger?

Also, post your mods again.

This log is with 91 octane with a couple 1% changes. I will head back out in a few minutes and get the settings/nepoints. I figured out that I actually don't have "pocketlogger", but it is the Tunerstein software so no way to up the sample rate. Mods are 264/272 cams, 720cc injectors, fuel pump, TBE w/Helix HFC, Evo IX turbo, Ecutek flash.

720cc injectors are huge and if you've got a 255lph fuel pump, depending on your ecutek tune, you should have lots of room to lean out--even at high boost levels. again, i'm not sure what ecutek's rich/lean safety margin is--but it looks like your on the way to figuring it out!

SJCoruja
04-05-2006, 11:21 PM
Did some more runs tonight and started playing with the settings. This is on 100 octane with the MBC set at 22.5psi.

2558 .89 11
2710 .89 8
2894 .91 5
3152 .91 2
3417 .93 4
3738 .91 4
4042 .91 4
4378 .91 6
4679 .91 6
4988 .91 7
5277 .91 8
5562 .91 9
5843 .91 10
6140 .91 13
6378 .91 14
6656 .91 16
6894 .91 17
7109 .93 18
7304 .93 20
7515 .93 21

Good as is? Back the boost off a bit and go for .89? Lean out the top end a bit? Thoughts?

evoredy
04-05-2006, 11:46 PM
Did some more runs tonight and started playing with the settings. This is on 100 octane with the MBC set at 22.5psi.

2558 .89 11
2710 .89 8
2894 .91 5
3152 .91 2
3417 .93 4
3738 .91 4
4042 .91 4
4378 .91 6
4679 .91 6
4988 .91 7
5277 .91 8
5562 .91 9
5843 .91 10
6140 .91 13
6378 .91 14
6656 .91 16
6894 .91 17
7109 .93 18
7304 .93 20
7515 .93 21

Good as is? Back the boost off a bit and go for .89? Lean out the top end a bit? Thoughts?

don't back the boost off! nooooooo

what are your throttle points? hopefully around 20 low and 80 high. watch the spike and the associated ne-point under high throttle. lean out your mixture across the board maximizing the curve after 3-3.5ish and account for the spike if you want. get the car as smooth as possible from ne-1 to ne-max after you decide what your target o2 voltage is.

GST
04-06-2006, 12:37 AM
Well at least my timing map is consistent...

Let me know when you want to bring her in, I'll drive you tune (much cheaper that way) and you can see what she makes.

Mike

EvoKid
04-06-2006, 02:15 AM
I might be wrong, but I though tuning off the stock O2 voltage wasn't a great idea. Shouldn't he use a wideband???

SJCoruja
04-06-2006, 08:28 AM
Well at least my timing map is consistent...

Let me know when you want to bring her in, I'll drive you tune (much cheaper that way) and you can see what she makes.

Mike

Awesome Mike! I must say it has been alot more than the timing map being consistent. I was just using this as an experiment to learn on a bit, but since day 1 the 02s, stft, ltft, and timing have all looked great and at most I did a 1% change (which probably didn't really make that much of a difference) on fuel at the start just to learn. Now that I have moved up to 100 oct, it has made it (too) easy to just make a few minor adjustments more or less across the board for the higher octane. Thanks! :thumbsup:

SJCoruja
04-06-2006, 08:30 AM
I might be wrong, but I though tuning off the stock O2 voltage wasn't a great idea. Shouldn't he use a wideband???

Yes, ideally I should (and someday will) be using a wideband. I am going conservative though and only trying to get close before I take it to the dyno and use the equipment there to really dial it in. :D

evoredy
04-06-2006, 01:38 PM
Well at least my timing map is consistent...

Let me know when you want to bring her in, I'll drive you tune (much cheaper that way) and you can see what she makes.

Mike

Awesome Mike! I must say it has been alot more than the timing map being consistent. I was just using this as an experiment to learn on a bit, but since day 1 the 02s, stft, ltft, and timing have all looked great and at most I did a 1% change (which probably didn't really make that much of a difference) on fuel at the start just to learn. Now that I have moved up to 100 oct, it has made it (too) easy to just make a few minor adjustments more or less across the board for the higher octane. Thanks! :thumbsup:

1% on your setup doesnt do crap with an afc2. don't forget the egt because 8 burned exhaust valves suck. you have lotsa room to lean out, but you'll never know short of a lot of clacking or an egt/o2 sensor combo.