this is not surprise at all. GM canceled the ABS as a standard equipment on all its America models couple of years ago, because of the poor performance and constant issue it created. GM claimed the user still can buy it as a option, but GM does't take any responsibility if anything happened. It is the user responsibility to put the ABS on the vehicle. Hard to understand, isn't it? Funny N. New Bedford, MA http://www.AuElectronics.selfip.com ----- Original Message ---- From: Carl Denk To: Microcontroller discussion list - Public. Sent: Saturday, January 26, 2008 9:00:50 AM Subject: Re: [EE]:: ABS increases stopping distance by typically 20%+ on gravel surfaces Sure decreases stopping distance in certain conditions, take a sheet of ice, compare just standing on the brakes with and without ABS on a straight stop, or with one side wheels good traction. A skillful (how many of those do you know) driver may be able to better the numbers. And yes the ABS is great on turns, but not the answer.Was just the other day with 2002 Cougar, front wheel drive, big engine, ABS and traction control, was making tight (maybe 50' radius) turn at low speed on ice. Was at no throttle, tranny in drive, front start sliding, a little throttle ans front sliding friction turned to static friction, and turn completed on planned track. Neither ABS or traction control helped there. To add enough throttle for those to become active, and the remainder of the turn would have been too fast for anything to help. William "Chops" Westfield wrote: > On Jan 25, 2008, at 11:08 PM, Apptech wrote: > > >> A competent authority has assessed that ABS brakes INCREASE stopping >> distances on gravel (metal) surfaces by typically 20+ percent. >> > > Is that a surprise? I thought the point of ABS was to increase > CONTROL (steering) during heavy breaking, not so much to decrease > stopping distance. In fact, I'm surprised that ABS *ever* decreases > stopping distance... > > BillW > > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist