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2010 2011 BMW 5 Series Forum F10 Should I be running two tunes in tandem? |
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View Poll Results: Should I be running two tunes in tandem? | |||
Yes | 4 | 33.33% | |
No | 8 | 66.67% | |
Voters: 12. You may not vote on this poll |
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10-01-2013, 03:18 PM | #1 |
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Should I be running two tunes in tandem?
Hello everyone,
Been thinking about this for a while. As some of you might know, I had the N55 JB4 stage 1 installed and then went ahead and bought the race chip. I have been happy with the performance of the race chip overall but miss the explosiveness that came with the JB4. I have been thinking for the last week about running both tunes in tandem, with the base tune being the race chip and the override with BMS stage 1. I was a bit scared that this maybe a bad idea, as it may not be the safest thing to do. I gathered my courage and did this today. I have not pushed the car at all, I just wanted to see if there would be any CEL thrown, and guess what.... It runs just fine! Now before I go punching the pedal to the metal, I would appreciate if anyone here, who is more technical than me, could give some sound advise whether I should be doing this to start with! For your information the car is owned, so I don't want to ruin it/damage the drivetrain... Please chime in.. MBA |
10-01-2013, 03:24 PM | #2 |
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Running two tunes without any logging just sounds like a real BAD idea.
You don't want the tunes to stack boost over each other because the car won't be able to adjust the fuel/timing enough to compensate for it. I've seen people stack a piggyback tune over a flash tune before but not two piggy back tunes. Alan
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10-01-2013, 04:29 PM | #5 |
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I'd have thought you're either going to get one over riding the other, or two combining/interfering and causing unknown issues. I'd leave well alone and stick with one or the other. Its all very well having a quick car for 5 minutes and then a 20K bill to repair an engine and/or gearbox.
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10-01-2013, 09:47 PM | #6 |
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Went for a spin, didnt push the limits or anything. Car is gone insane! The DTC wouldnt stop flashing up to 3rd gear!! I am astounished at how this is working. The guys at BMS must not be pushing limits at all if this is what I am getting out of the tunes. Thankfully no CELs thrown so far or limp mode activated. Curious to know how much power I am generating now!!
MBA |
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10-01-2013, 11:14 PM | #7 | |
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10-02-2013, 05:45 AM | #9 |
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You could try running higher octane, but you would need to know where you are in terms of boost, timing, EGT, and A/F ratio to determine whether it's "safe" or not.
With more boost, and/or timing, it may increase the octane requirement above 93, so adding more may add a little protection... Ideally you would dyno/log the parameters and see if you are "safe", or try adding higher octane to see if it can get you into the "safe" range where EGTs aren't too high, A/F is ok, etc. Good luck! |
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10-02-2013, 08:51 AM | #10 | |
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MBA |
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10-02-2013, 08:55 AM | #11 | |
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10-02-2013, 09:37 AM | #13 | |
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I'm hoping to install the tune tonight, they initially sent me the wrong connectors and just got the correct one yesterday. Looking forward to it. |
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10-05-2013, 12:43 PM | #15 | |
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