Performance went down at the half of the distance

Hello guys,

I've got a big problem. I've driven two drivers the first two races and in these two races, there are the same problems: after the half of the race, the performance went down massively. At the end, I'm almost half a minute slower than the other one. On the second race I lead the race in lap 20, but afterwards the performance went down and I finished finally on P19 and P20. What's going on there? The car and its parts are okay, so there shouldn't be the problems there and the physis of my drivers are strong, so this can't be the problem as well. So does anybody have an idea, why the performance decreases so much during the race?

Last race its "Pretty much" you ran a 14 lap stint, then 14 laps, and then attempted 26 laps [so you had twice as much fuel as every1 else so lost a lot of time because of that, and then it looks like you run the tyres down to such a low % you were far too slow & you got a puncture] If you look at your first 2 stints your fastest lap of the stint is the 1 before you pit [as you are on the lowest fuel] if you look at your 3rd stint you did 9 laps after your fastest lap meaning most probably your tyres were down about 40% or so

http://igpmanager.com/play/?url=race-result/64774/13570 [You can check your fuel/tyre % here & post the screenshot if you want]

Over the last 4 laps you lost 2minutes and 2 seconds, so your car either had red parts, or you were driving around with wrecked tyres

Your first race is due to the same, you did 13laps, then 7 laps on softs, then did 30laps on hard tyres, doesnt look like you got a puncture [that would have cost you a lot more time, but due the carry 3times as much fuel as every other car you will be slower by a mile]

Thank you. So next time I should stop 3 times driving hard tires?

I've got also another problem: I've got DRS, but not KERS. How can I activate KERS?

Have a look to see what other people are running in your league[or other leagues for comparison], i wouldnt run a 2stop in a 100% race though... a 3/4/5/6 stop would all be an improvement

KERS is purchased in facility's / research, you need to be Level 6 [as opposed to level 4 for DRS]