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06-12-2016, 06:58 PM | #1 |
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Chasing Down/Passing an M2
I realize that in the hands of a more skilled driver that the M2 should have beaten me, but regardless, being able to chase down and pass a vehicle with 5 more HP and 60 more lb/ft of torque than my M Coupe definitely brought a smile to my face. And this was probably the 3rd time that happened over the track weekend.
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06-12-2016, 09:20 PM | #2 | |
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06-13-2016, 03:55 AM | #3 |
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Very nice
Care to disclose how your getting the track data superimposed on your cam vid? cheers
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06-13-2016, 04:48 AM | #4 | |
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Hey Vanne, I was using Harry's Lap Timer (Petrolhead edition) on my iPhone. It records video and telemetry automatically, and then you just press a button to merge the two after the run is complete. It's a great app, and even allows you to integrate multiple camera feeds as well as pull car data from an OBD dongle, if you like. I had the phone mounted on a magnetic dash mount that I use every day, but most of the shakiness was due to forgetting to lock the focus, as well as the wind rushing in and playing havoc with the mount. Not a bad result for a $20 app, though.
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06-13-2016, 06:25 AM | #5 |
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Lol, i have that app, and use it to record my runs.. how on earth do you combine both?
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06-13-2016, 07:17 AM | #6 | |
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06-13-2016, 07:19 AM | #7 | |
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I think what happens is you stop looking ahead (past the car ahead) and start looking at the ass of the car you are chasing.
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06-13-2016, 07:24 AM | #8 | ||
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06-13-2016, 10:07 AM | #9 |
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I find that happens with a great number of students. I had told more than one to "drive your line" don't follow the car in front of you. When run sessions were over I've had more than one student be mad at the student I had because they thought my student was going to hit their car.
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06-13-2016, 08:54 PM | #10 | |
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06-13-2016, 09:50 PM | #11 | ||
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I spent some time today reviewing my video from various sessions and comparing them to videos from more experienced drivers with similar vehicles (mostly E46 M3s,) and I was able to identify several turns where I can shave a good amount of time off by either carrying more speed into the turn, or downshifting prior to the turn to accelerate faster post apex. I also need to work on braking later, but with more force. Being my first track event, I'm still getting comfortable with just how quickly the vehicle can stop from track speeds, as well as the traction limit of the tires. Based on telemetry, I ended up taking most of my turns at .9 Gs, but I noticed that on the final two turns I rarely pushed it past .7 Gs, which is in part due to feeling less confident because of the slightly downhill nature of those turns, but I'm sure I could add 5-7 MPH without pushing it past .9 Gs and still remain safe. So much to learn, and I'm thankful for it.
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06-14-2016, 09:46 AM | #12 |
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Proper braking is HUGE, and not just braking harder & later.
It's still the thing I work on the most.
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06-14-2016, 01:51 PM | #13 | |
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06-15-2016, 03:59 AM | #14 |
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Our cars can outbrake most cars, even with oem claws. Its where i make up most ground after getting blasted on the straight.
Last edited by Vanne; 06-15-2016 at 04:29 AM.. |
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06-15-2016, 04:04 AM | #15 |
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My instructor said something similar. I suppose I just need to keep pushing the envelope. Putnam Park will be good for that, as even if I end up braking too late, I'll just slide into the grass (not that I'm eager for that to happen.)
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