Quote:
Originally Posted by ja1217
I was wondering if you could take a quick look at some data for me...
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My take is that the other car has a somewhat better power-to-weight ratio than yours does. I think that partly from looking at the data, and partly because I don't think you're leaving 1.56 sec. on the table - more like .5 to .8 would be my guess. You'll find that time by being more consistent.
Some thoughts:
0) Your line is very good; I only saw a couple of places where I'd make or consider making a change (see below).
1) Because he's braking earlier, he likely has his car more settled at turn-in. You're frequently a bit abrupt at turn-in. I'd leave the late-braking to others, and concentrate on being as smooth as possible all the way through the corner with the goal being to go flat at the apex and stay flat after it (in the corners where that's possible). You can then play with adding entry speed, which is easier when you've got your major braking out of the way and the car is settled.
2) As was mentioned, he's got way more torque than you do (~200, I would guess), and because his HP is greater than his torque, he's not having to pay a price for that advantage. If you solve that, I suspect you'll no longer be in TTD.
3) You're aggressive, and that's good - for example, I really like the way you use all of the track coming out of T10. I would focus now on being as consistent as you can be. You might have to reduce the aggressiveness to nail that, and then add the aggressiveness back in as you take it back up to 9-10/10ths.
4) Except for the exits of T3, T9 & T10, on that track I can't think of a curb that it helps to be up on. Of course, YMMV. As part of increasing consistency, I think you'll want to ensure that you've got the car exactly where you want it to be in every part of every corner on every lap. Absent that, you're shortchanging yourself.
Another way to help achieve that consistency is to install a race chair and a harness, assuming that's an option. That would make the car much easier to drive at those corner speeds.
5) Your line through T5 looked good on L8 - I wonder if that isn't the line you should be aiming for on every lap. (You'll have a much better idea of this that I do.) If you try it, you might have to move a bit further to the right before turn-in to make that line consistently.
6) You're turning in early at the end of the main straight. Fast drivers do a sort of very minimal Scandinavian flick at the end of the straight to widen the arc of the turn. I'm guessing that you're a couple of feet right of that line (ex.: ~6:31 in the video). In the screen shot below, you would turn left such that your left front tire travels towards the dark asphalt on the left side of the white line (see red arrow). Some drivers get over the line, some just go up to it. It's all over with in a hurry, and then you're headed to the apex on a much better line due to the wider arc.
7) I'm wondering if you can't get more from T4 turn-in to T5 turn-in. T4 has more camber than is generally realized, and when I walked it last year it also had a really grippy surface from the repave. There have been some bad accidents in T4, so make sure you stay off the inside curbing.
8) You ran faster on every lap - good job!
Some questions:
1) Can you post a graph of both of your laps (like the one below) showing speed, throttle, and brake with the x-axis showing distance as it is now?
2) Do you have the adjusted weight-to-power for both of the cars?
3) Did you ask the TT Director to see Marc's classification sheet - unless you already know what's on it. It's always interesting to see what others are turning in.
4) How many heat cycles were on your tires? Do you know how many heat cycles before they go off? (They didn't appear to be off, and if so they certainly didn't go off during the session.) Any idea how many cycles were on Marc's tires?
