I get aroun 70-80fps usually, but at race starts and things it goes down to about 35fps.
Not too bad.
I got
Intel Dual Core 2.8ghz
ATI Radeon X800GTO 512mb
512mb RAM
So, pretty good considering my fairly low memory.
It's what i love about LFS, it doesn't need insane power to play well.
My old PC had 191mb of ram, a 700mhz intel celery processor, sorry i mean celeron. I got a whopping 3fps.