Martin, Please don't take me wrong here, I'm not picking on you... you are just wrong. Changing caster from negative to positive helps on uneven surface? NO, you are wrong. Unless pretty much all of the world engineers designing car suspensions are wrong. Think about the setup as a whole. Let's say that a you hit a pothole in the road. The LCA moves back and causes the caster to become positive. At the same time the distance from the frame centerline and the lower ball joint becomes shorter causing the wheel to be pulled in at the bottom (positive camber). The steering arm is now at an angle causing shortening and that causes the wheel to toe in. How can that help on uneven road?? The weight is transferred to the outside edge of the tire and pointed in (toe in). How come rally cars have very stiff suspension components that do not allow any change in caster or camber? Negative caster causes self centering of the steering wheel because the weight of the car pushing down causes the wheel to want to track straight. Changing caster to 0 or even further causes loss of traction and unpredictable "wander" in the front end as well as neutralizes the self centering of the steering. That's the reason why new cars are being design with A arms that do not allow any change in caster. That includes rally cars or even off-road cars. Take care, Greetings from Poland! Tom Niemczewski Vin 6149 plus 2418, 3633, 5030, 16473, 17086 Google earth: 52°25'17.66"N, 21° 1'58.40"E -------------------------------------------------- From: "Martin Gutkowski" > No you are wrong, the changing from negative to positive castor serves to > track the car straight over an uneven surface. This is what Mike Loasby > said. And I've now said it twice. > -----Original Message----- > From: "content22207" > > The LCA wiggling back and forth obviously serves no useful purpose. It is > an unfortunate consequence of making the sway bar try serve as a backwards > thrust arm -- a task for which it is totally unsuited. > > --- "Tom Niemczewski" wrote: >> >> From: "Martin Gutkowski" >> >> > Ed's setup attempts to restrain the fore/aft movement of the arm >> > altogether when there is a reason for it in the first place. >> > Martin >> >> Martin, >> What is the intended fore/aft movement in the LCA? What's the reason for >> it >> and what good does that movement do? >> >> I can't see any advantage in having LCAs so sloppy. To me this setup is >> nothing short of a disaster. Under braking when the arms move back they >> compress the springs unevenly, put unnecessary strain on the shocks and >> the >> most important thing it destroys the entire geometry of the suspension >> system - caster becomes positive, camber becomes positive, toe goes way >> in. >> If the goal here is to loose grip and destroy the tires then this setup >> is >> perfect. >> >> Am I missing something? Please put me on the right track. >> >> Thank you >> >> Greetings from Poland! >> Tom Niemczewski >> Vin 6149 plus 2418, 3633, 5030, 16473, 17086 >> Google earth: 52°25'17.66"N, 21° 1'58.40"E >> ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: dmcnews-digest@xxxxxxxxxxxxxxx dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/