08-05-2020, 07:52 PM | #1 |
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Did some data logging from 3rd gear 2000 rpm to redline. Not sure what to look for tho lol. Maybe someone can help me.
Recently went to stage 2 93 oct. I have a FTP charge pipe a CTF intercooler, AEM air intake, Wagner high flow downpipe. It feels faster but I feel like there should've been more of a jump in performance. The parts were expensive lol. https://www.bootmod3.net/log?id=5f2b...0b435eae16a362 https://www.bootmod3.net/log?id=5f2b...0b435f34cb1326 https://www.bootmod3.net/log?id=5f2b...90c641c9357f2e Thanks |
08-05-2020, 08:24 PM | #2 |
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You're in luck as i did a writeup just for this purpose. Read here:
https://f30.bimmerpost.com/forums/sh....php?t=1732327 |
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08-05-2020, 08:31 PM | #3 | |
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Timing doesnt look great... Its not the worst but you have corrections pretty much across the board on all cylinders and up to 5 degrees being pulled from cylinders. There's definitely some power loss from that. What plugs are you running, what gap, and how many miles on them? Its looks like just fuel quality issue, but plugs can be a factor as well. You have a couple options, assuming its fuel quality - Get higher octane fuel (either in general or with E85 or addatives); Run the 91 map for more consistent timing, but that's not really going to help the butt dyno; Continuing running 93 map and accept the corrections and inconsistent power. |
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08-05-2020, 08:32 PM | #4 | |
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08-05-2020, 08:34 PM | #5 | |
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If you have questions about your specific datalogs, you can keep those in this thread. I posted some initial responses above. |
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08-05-2020, 08:38 PM | #6 | ||
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08-05-2020, 11:57 PM | #7 | |
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08-06-2020, 12:01 AM | #8 | ||
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08-06-2020, 03:11 AM | #9 |
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curious, when you say options of running 91 octane to clean up timing or keep running 93 and live with the corrections... would the performance be basically the same? as in the timing being on the 93 map pulled meets 91 octane standards, or would cleaner, but less, feel better power wise?
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08-06-2020, 11:11 AM | #10 | |
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Some people run boostane or other additives, but generally not something you want to do long term and i personally feel thats more of a band-aid/temporary solution. E85 is a good long term solution if you are OK with spending the extra time/effort to do it. I think with your timing you could get away with probably 3 gallons of E85 per tank on the 93 map. It would take a little trial and error. If you were going to go the E85 route you could also just run the actual E map, which will make more power than the 93 map. In that case you would want to actually test your E85 ethanol content and do a 'proper' mix to target E30, rather than just adding a few gallons to 93 to up octane. |
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08-06-2020, 11:15 AM | #11 | |
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As a simple example lets say the 93 map is targeting 8 degrees of timing at 5000 rpm, but its pulling 3 degrees or more across cylinders. If the 91 map is targeting 6 degrees of timing with no corrections, its going to make more power. This happens because the DME typically pulls a little more timing than might be needed (safer), then feeds it back in, rather than only pulling a little bit and potentially still getting knock for example. The other factor is how consistent your power delivery is. If your tune is operating right on the octane limit of your fuel you might have alot of variation in power between pulls if you get one clean timing pull then one with alot of corrections. I felt this a LOT running the 91 map with 91 California fuel, especially in summer vs winter temperatures, and it was clear in the logs with sometimes massive timing corrections when IATs were higher. With the E20 map running E30, theres not only more power, but the power is always there. |
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08-06-2020, 04:42 PM | #12 | ||
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08-06-2020, 05:42 PM | #13 | |||
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https://www.bootmod3.net/log?id=5f2c...90c602250958e1 Felt good, timing looks good too now after the octane booster |
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08-06-2020, 05:50 PM | #14 | |
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Timing looks mint in the log though. I am honestly surprised the octane booster made that much of a difference. How long after the original flash to stage 2 were the first set of logs? If not long (in terms of miles), there also could have been some adaptation going on. Either way i would put some more miles on it and log again to confirm this wasnt a (good) fluke. Also, are you measuring 0-60 with dragy or what? |
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08-06-2020, 05:58 PM | #15 | ||
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08-06-2020, 06:14 PM | #16 |
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I would say just log again near the end of this tank, then with a fresh tank with no octane booster and see how it looks.
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08-06-2020, 06:32 PM | #17 | |
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Also I really appreciate the info and the help you gave me. Means a lot! Thanks |
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