vehicules in boatescape5

One of my friends, who runs a newly set up zombiemod server asked me how to get the player controlled vehiclues on boatescape5 to work (instead of glitching everyone through the bottom like they used to on our servers).

He has these in his cfg.:

sv_turbophysics 1

phys_pushscale 3

sv_pushawayclientside 1

sv_pushaway_force 35000

sv_accelerate 10

sv_airaccelerate 100

any ideas?

sv_turbophysics 0

i wasn't sure if it was supposed to be 0 or 1, thanks