If you see the feathering on the tread [post above] the feathering is on the inside edge. To the novice this would indicate too much toe-in. It can also be not enough positive caster [or some negative caster] Normally too much toe-out combined with positive castor will wear the outside of the tyre....But the feathering will be on the outer edge of the treads. If the toe-in is within spec and there is a slight amount of positive camber...... try dialing in a bit more positive caster [lean the axle back a bit] Toe-in [or Out] is needed to counteract camber thrust, which is basically two cone shaped wheels driving apart [or towards] each other. Whereas Caster is needed to counteract drag caused by scrub radius. Every adjustment will have consequences elsewhere in the settings. On a hotrod you cannot use factory settings, but "applied research and development" [aka: "lets try it and see"] A good allignment guy and a tyre pyrometer is your friend here. Personally I would recommend finding a guy that sets-up [races]old Formula Ford 1600's. These guys are constantly playing with alignments to get that perfect set-up. Traction always has a trade-off with tyre life, We're use to measuring tyre life in Laps [not years]
The Jalopy Journal
