This exactly reminds me of my post before about an year or so...
Anyways try getting a wheel if you can or try the mouse because they are way faster and give you more control indeed.
But if you are not in for a wheel at the moment : and the mouse makes no sense to you(like it never did to me)then use the KS option and try playing around with three options i.e steer rate, return rate & button control rate till you think they work the best for you.
There are times when you think you can do no better and the solution is to just stop driving and go around doing some research. Firstly, go download some KS & KN hotlaps from LFS world to watch the way the top 3 or 4 guys drive. Note their lines, their braking zones, their speeds through corners just note each and every detail. Download Replay Analyzer its a very very good tool.Read all threads on this forum that may help you drop your times.Go read the LFS Manual. Read about trail braking. Read about setups. Poke your nose just don't sit htere wondering how its going to happen...
After you've done all the research, start experimenting. Its not necessary that the WR set or the fastest KS racer's set may work for you. You have to spend hours trying new things with control settings and setups till you end up doing a lap that you never thought you could do...your new PB.
After that you'll start doing you pb in every other lap that you race online and you hit the roadblock yet again...back to the drawing board
)))
Its a process where you need "EVOLVE" with time. Just stick around and keep trying...your times will drop soon.