Over the year's i have done a huge amount of testing and tuning on lots of different racing game's.
I run clean consistent laps when testing, i can definitely say it's not down to better, faster driving.
I understand in some cases upgrading cars can unsettle it and make it slower,
i have done engine upgrades on three different cars now without any difference in speed or lap times.
Others on my friends list have said the same thing, maybe its just the cars i have tested or maybe the engine upgrade
just doesn't work!
I think the tuning and upgrades are neither here nor there, if i can run a 123.7 fully tuned and a 123.4 stock
something is wrong, i would say a good tune should account for a second or so, same with upgrades,
its just not the case tho.
Don't get my wrong am loving the game and think its the best racer for PS3,
just think its a area that could/should be improved.