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All COBB Tuning AccessPORT Flash for N54 335i Discussion Here
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07-07-2013, 03:55 PM | #8009 |
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E30 3rd gear data log
FBO. Put in 4 gal e85 and 10-11ish gal 93. Attached is the log on e30 map. What bothers me is the Timing Cor. of -6.75 Should I switch back to Stage2+FMIC?
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07-07-2013, 04:07 PM | #8010 | |
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regarding your timing corr. at -6.75, i was seeing this when my coil was bad. If you are not getting misfires, then you may soon. I did. Run the new blend and take a look at your corrections. if your cyl 2 is still giving you fits, swap coil and see if the corrections follow. If it follows then you know its the coil. when was the last time you changed your plugs? your LPFP looked OK. Don't want to drop below ~50 EDIT: Oh and its normal to see high correction post shift. no worries there. Reset Data Log Lists. We want to see your Pedal Pos. and Throttle Pos. I don't know when you hit WOT and if you have any throttle closures.
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07-07-2013, 04:23 PM | #8011 |
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AT or MT? if AT launch from 2nd Gear. you will shave tenths.
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07-07-2013, 04:41 PM | #8012 | |
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Plugs were changed 2 days ago. Walnut blasting was done same day also. I have 60k+. I had a little more than half tank so I assume that was 8.5 93 gal. I then put in 4 gal e85 and 3 gal 93, in that order. Didn't do like what you said. Thanks again and will report back result next weekend with all of your suggestions. |
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07-07-2013, 04:43 PM | #8013 |
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07-09-2013, 10:37 PM | #8014 |
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Can someone look at this datalog and help make sure that everything is running ok? 3rd gear pull, stage 1 sport, completely stock besides tune, running 93oct. Car feels like it runs well. Plugs haven't been changed yet, car has 31k miles.
Thanks!
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07-11-2013, 08:44 AM | #8015 |
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Remove old flash?
Hi guys! I have order a cobb and my car is flashed before. can i connect the cobb and put in new flash or do i have to have the car reset before i can use the cobb?
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07-11-2013, 08:47 AM | #8016 | |
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07-11-2013, 08:50 AM | #8017 |
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Took my car to DEQ for emission testing with the COBB flash installed. The VIN was not my VIN on my MSD80? Doesn't the AP store the VIN? Why would I have the VIN from COBB's test car on my car. Sloppy if you ask me.
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07-11-2013, 08:55 AM | #8018 |
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Sweet thank you Then i don't have to put more thoughts in how I'm gonna remove the old flash
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07-11-2013, 09:25 AM | #8019 |
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that is interesting. Anyway I could check?
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07-11-2013, 09:37 AM | #8020 | |
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you got some throttle closures around ~4100, looks like due to overboost. Other members on here can help you clear that up. Other than that looks good. bump up to Agg bro! you got 93. oh and no need to redline like that, 6500 - 6700 is good enough. Power drops after ~6200 or so.
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07-11-2013, 11:33 AM | #8021 | |
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Thanks, I won't take it all the way to redline next time . Flashing to aggressive this evening, and will take another log.
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07-11-2013, 01:46 PM | #8023 |
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yes, i should have mentioned that. Have traction control completely off. Be safe
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07-11-2013, 08:51 PM | #8024 |
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-3, -6, -9 timing corrections cruising around ?
Currently running a mildly aggressive E20 map with 2.5 gal E85 balance 93 octane per tank.
Just wondering if anyone is experiencing this: During WOT runs, 2000 to 6500 rpm, no timing corrections. But cruising around town, see sometimes -3, -6, and -9 timing corrections, at around 2000 rpm in one cylinder.... Usually cylinder 1 in my case.... Any idea what's going on?
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07-11-2013, 08:51 PM | #8025 | |
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Alright, here is my second data-log. This is running stage 1 aggressive, 93 octane, traction control completely off. Based off what I know so far, car isn't running as well according to the log but it still feels just fine driving.
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07-11-2013, 09:10 PM | #8026 | |
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07-11-2013, 09:54 PM | #8027 |
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Hmmm... I would think all this "knocking" could potentially damage the cylinder, even at partial throttle. I was wondering if it's a sign of a coil going bad? Also, I don't get any fault codes, so apparently I haven't misfired (yet).
BTW- To get a "global average" of the timing correction frequency per cylinder I'll do a ca. 10 minute log while driving home from work...lots a varied driving styles...stop and go, WOT, etc. Then I'll find the average of each cylinder's timing correction by opening the log file in Excel. For me, cylinder 1's timing corrections are listed in column L, so the average for 14,486 data points (about 10 minutes) collected during the run is calculated as "=sum(L2:L14587)/14586". I do the same for cylinders 2-6, stored in columns M-Q, respectively. My averages have been something like -0.06, -0.04, -0.01, -0.02, 0.00, -0.04, respectively, for cylinders 1-6. Cylinder 1 always seems to be the worse. Less E85 makes these numbers higher (more knocking presumably for lower octane). Indeed, I can surpress most of these partial throttle timing corrections with more E85, like another gallon per tank. I suppose I can do the Cobb coil switch test. But that takes like an hour... So as long as I don't get any misfire codes I probably don't need to change coils? (I'm at 37,000 miles with new plugs about 6,000 miles ago.) Thanks in advance for everyone's comments.
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07-11-2013, 10:23 PM | #8028 |
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The DME uses small corrections when cruising, you are not doing any damage to your motor. For that matter even under WOT, as long as you aren't seeing large corrections across multiple cylinders, you're probably OK on that front. Timing corrections happen, the DME is extremely sensitive to the conditions. If you are logging clean at WOT and not throwing any codes, your car is fine.
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07-11-2013, 10:34 PM | #8029 | |
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MHD Self-Tuned Scaled FlexFuel Map | M-Boost | N20 Tmap | Helix IC | Fuel-It Stage 2 LPFP | BMS DCI | BMS Thermostat Delete | CP-E Charge Pipe | Tial-Q BOV | Apex Arc-8 Hyper Silver | Michelin PSS | Cool Carbon Brake Pads R/T | SS Brakelines | ECS 2-Piece Rotors F/R | xHP Stage 3 | xDelete Sport | KW-V1 Coilovers | Turner Strut Brace | Lux Angel Eyes | CF Kidneys | Scoops
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07-11-2013, 10:41 PM | #8030 | |
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Regardless, did you have a previous tune? Did you ignore the message about detecting another tune and loss of data? We absolutely keep the vin intact while tuned. Of course its recommended to uninstall if you're going for an inspection or visiting the dealer. We do not set readiness codes, so inspection would likely be an issue anyway (unless they only read vin and DTCs I guess). Feel free to contact me or our techs if you have any questions about our process. -Josh |
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