I will give one of those seemingly useless lengthy replies when a simple one could still do it.. I just feel like it.
It's a good thing you uploaded the lap to lfsw, easier to explain. Lets for now only focus on the last turn, the hairpin with the bumpy downhill approach. Say you want to improve your speed at the finish line. This turn is the place that descides that speed.
(I'll assume you haven't used this tool before, so I don'w have to explain it later
) Compare you lap with Juergen1975(click c after you name then c after his and then the hotlap analyzer button, if you're not sure how).
In the window that pops up we will only focus on the squigly line in left buttom corner(if you haven't changed the original layout). Make sure that "sync" is activated(bright blue), you can find it on top of the window third after Juergens name, click on it to change it's status.
NOw click around randomly in the speed graph you see a vertical line appear, if you click hold and drag it will "play" that part of lap. Go to the last turn, it's the big dip on the right of the graph. Check who's red who's blue and notice how your speed is much higher right at the entrance to the turn. In fact if you were to compare yourslef with Worm on that exact spot(just open another of analyzer window, you're still faster there(other racers can get away with that, but forget that for now).
What this does is make it harder for you to be early on throttle in the turn. To illustrate it simply: just record another spr that you will analyze. But this time in the last turn focus on braking in a straight line waaaay longer then you alawys do... just riddiculously "miss" the turn. Simmilary to what I do in the lap I uploaded, I overdid it and also did a poor job of it, but you get the point.
Eventhough I'm slower then you there, I still end up going faster at the finish line.
yepp all that to say you gotta be earlier on throttle to go faster after turn, but i also wanted to show how you can look for such things yourself play around with the hotlap analyzer it's an awesome tool, I for one enjoy it quite a bit.
It's not that you have to be early on the throttle, this is obvious, but how to do it and what's stopping you is the tougher bit to see, this tool lets you see that.
Then of course just being fast out of a turn is not all that there is, see how my last turn is still slower then yours? I loose all of it in the braking. So what you really want to do is to shift the speed balance a little bit. Less in to the approach and more out of it... this automatically makes you go on throttle earlier.
BTW: there's no need to brake longer in a straight line, the line is not important the speed is.