the key is to keep the exhaust free - keep moving, but you are right, too fast could throw water up into the air intake - trouble is with deep water is you don't know if any of the road has been washed away - Not Good!

__________________
Mark _______________________________
2001 X5 4.4i topaz blue/sand Sport, complete Dinan S2 , hitch, V1, tint, BSW Stage 1, Alpine INA-W910BT
___________
Life is not fair!
You can't protect people from their own stupidity!
Laughter makes life worth living