Your engine propels you around the track creating acceleration forward, laterally and when breaking.
G forces centripetal force, etc., because your turning.
Turn sharper or travel faster in the turn or any of the above and you make more "on track forces".
Your tires take advantage of available grip to allow you to apply what ever available hp you have and what ever momentum you build anywhere on the track.
Fast is about applying available hp to the track for forward acceleration and maintaining momentum between where you can apply available hp.
It's the forces created by your moving racer on the track which cause you to be able to operate your chassis.
Reduce or limit the forces available to you on the track and you either have to make your chassis work easier or do something to take advantage of more on track force.
The rest is up to your drivers skill applying the above and their racing experience and talent.
___________________________________________________________________
Looking at the track on the web you might suggest or talk about this with your driver.
Racers talk about hitting their points on the track to get things done.
It's a mindset thing about either hitting your marks or using an >>area<< of the track to accomplish something.
Never ever think of a "Point" as a real dotted point on the track which needs to be driven to.
You don't drive to a point you "travel" to an area where you will begin to accomplish a task.
Driving to a point, an example of is where you will enter a turn will put your driver in a mine set to take a straight line to the needed "point".
In the case of turn entry the straight line "will" cause them to do what's called chopping off a corner.
Chopping off a corner is driving straight to a point of entry which then leads too driving straight past their point of entry.
Straight past the point of entry is most always followed by too much driving straight after the point of entry which prevents the driver from completing enough of the turn soon enough.
If you don't get enough turning needed for a turn or end of the track soon enough, you will either have to slow down to complete the rest of the turn or "PUSH" on exit. The more acceleration you do on exit while still turning the more the exit push will be enhanced.
The track I saw on the web IMHO because of it's rounded ends of the track will easily cause a driver to chop off part of it by choosing to enter an end of the track driving straight past a point instead of using an area of the track to enter.
sorry if I confuse, I tend to be clear as mud ...