03-16-2015, 01:15 PM | #1 |
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Money Shift(s) at track...
First, a positive note: The M Lap Timer app kicks ass! What a useful tool with telemetry data and the ability to scroll your way through the laps to find events.
Note: 6MT F80 On to my issue... I knew of one money shift at my track day yesterday. I was coming in hot 120mph on the front straight at Atlanta Motorsports Park. This was the fastest speed of the day for me. I had been shifting by ear the entire day and truthfully it was a bit hard to hear my stock exhaust over the wind noise with the windows down and the general sounds of the track. That time I saw as I was in the braking zone and downshifting that I had gone into 2nd far too early in the braking process and watched the needle go deep into the red. Fast forward and I looked back at my telemetry data for the day and found 2 more over-revs that apparently I did not notice. Both in the same place...the end of the front straight. The car is not making any noise nor is it behaving any differently as far as I could tell. Whether it was wise or not I continued the last 2 sessions after the one money shift I was aware of and my lap times remained within a half second or less range of my best laps for the day. So by that evidence, I have to believe my engine is OK...but I just can't imagine the motor taking an extra 800rpms without detriment. Here's the telemetry data at the moment of the 3 over-revs: (8427rpm is the highest of the 3) Last edited by Accel Junky; 03-16-2015 at 01:28 PM.. |
03-16-2015, 01:24 PM | #3 |
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03-16-2015, 01:24 PM | #4 |
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03-16-2015, 01:27 PM | #5 |
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You may wanna remove this thread in case you need to file a warranty claim at any point... just a thought.
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03-16-2015, 01:27 PM | #6 |
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03-16-2015, 01:28 PM | #7 |
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Yikes, I saw the thread title and who made it, and all I thought was "shit." Its iffy man, lets hope that no damage was done; BMW FSE's can pull all of the over-revs and they may decline a warranty repair due to them...
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03-16-2015, 01:40 PM | #10 |
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03-16-2015, 01:41 PM | #11 |
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Whoa! That 8247! At least it was in the braking zone, and not under acceleration.
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03-16-2015, 01:44 PM | #12 |
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Yeah, I was in MDM with Efficient throttle so rev match was on.
That is true, throttle off completely and braking rapidly but it felt like slow motion when I saw that one overrev that I witnessed. |
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03-16-2015, 01:50 PM | #14 |
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[QUOTE=Accel Junky;17573203]Yeah, I was in MDM with Efficient throttle so rev match was on.
QUOTE] How is that on the track? I've always had Japanese manual cars when I drive on the track and it's a WHOLE lot easier heel-toeing when the accelerator pedal pivots from the top of the pedal assembly rather than the way our German cars are set up pivoting from the bottom. So when my F80 6-spd arrives it's gonna take some getting used to I'm sure but hopefully the auto rev match feature works great? I guess we'll see. |
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03-16-2015, 01:55 PM | #15 | |
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Engaging the wrong gear would be the only way IMO.
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03-16-2015, 01:59 PM | #16 |
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no lift shifting?
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03-16-2015, 02:06 PM | #17 |
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First note, this is not a Money Shift (at least not yet). It is simply an over-rev. Your car is still running fine, isn't it ?
Second, I suspect you are doing the same mistake I see many students do. You probably are trying to get rid of the shift in a haste too early in the braking zone. I also had the same problem in my early years. I was so stressed out, barreling down the straight towards a corner, thinking I had to downshift and heel-and-toe that I just wanted to get rid of the downshift as fast as I could so I could focus on braking and hitting my entry point. Until someone pointed out the obvious to me, and it became a revelation: Focus on braking first. Bring your speed down and then you have all the time in world to do your downshift as you are approaching the corner at a lower speed . Further, the lower the road speed, the less rev increase is needed to go in the next gear, so the heel-and-toe is also faster and easier to execute. While with auto-rev-match you don't need to worry about heel-and-toeing, I would still recommend that you wait as late as possible in the braking zone to complete your downshift.
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03-16-2015, 02:07 PM | #18 | |
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MDM on the other hand was very intrusive accelerating out of turns. Lagged for days before I got my full acceleration back. BUT DSC off was just too much for me to risk after I tried it for half of a lap. So MDM stayed on the whole time. I think it did its job well of letting me go balls deep without much worry. |
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03-16-2015, 02:08 PM | #19 |
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Isn't there a cutoff at 7600RPM?
Unless the engine is mechanically driven, I don't see how it (over-rev) could be done with the throttle only...
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03-16-2015, 02:12 PM | #20 | |
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OP, check if there is any oil loss or if anything is wet. |
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03-16-2015, 02:13 PM | #21 |
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With a stick shift it is 100% possible. It's still mechanical when you throw it into a gate that'll cause it to overrev
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03-16-2015, 02:14 PM | #22 | |
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