hi, all
when I play offline, I have ~50 fps.. but, when I add 2 AI, I've got only 40 , and when I add more AIs (7-8) my pfs decreases to 14 same porblem is online.. is my processor too slow to simulate AI, or my video card is poor? 1700 Celeron and 128 FX5500 I know it's not very good, but what want to know why I have low fps (sorry for english:nod

Your CPU is definitely too slow to calculate physics. For every car on the screen is calculated complex physics. And when there are more cars, CPU is downed by it.
Your GFX isnt a problem really, LFS isnt highly GPU-power dependant.

but what about online? my pc doesn't have to simulate other vehicles, is it?

Of course it has to.... it is impossible to send all the physics data via net. LFS sends just info about basic motions(speed, X,Y,Z moves, acceleraton...) and your PC that calculates how the other cars moves using this data.

Dunno, maybe you expect some miracle performance tips, but LFS has a problem, they simple doesnt exist. In games like FarCry, Doom3 or HL2 you can boost performance by lowering details and so on. But in LFS you just cannot turn off tyre heating calculations, suspension bend or something like that. There are lots of necesarry calculations which you cannot get rid of. LFS need about 2.5GHz CPU to run good.... physics is physics....

thanks for assitance mate.

If it is of any help I have a link on my site (see link below) which gives some information on what task you could turn off while racin.
I have a similar problems and this was about the only thing that worked for me (after reducing setting as mush as I could

Give it a go - I know how frustrating it is to have low frame rate