254,803 -- Tier 1
Whew... managed to loop it. That last race is quite the endurance run.
Made it 4 levels into the second cycle, so Stage 28.
The guys just got too fast and all ran away from me at once.
On a two lap race there was just no getting it back.
Also, I strongly suspect that the enemy upgrade mechanic is almost entirely based on how many times that specific car has been killed by you. And it is cumulative across the entire game.
Basically to REALLY rock the game (like making it through two cycles, if that is even possible) you probably can't EVER attack the enemy and you have to win on raw racing prowess.