Quote:
Originally Posted by Dominik
Excellent reply - thanks! Nobody really paid attention to this “minor” detail.
Morris changed the whole thing.
He took the toe chance (bump steer) out (which was wanted in the 60s), but 15” tires are so much more fogiving and the 17” need such “gimmicks” much less.
I check once my next car is on wheels. I need to research toe curve a bit... But by the progress I am making, I have plenty of time for research ;-)
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Original 427's had a rubber mount on the front of the drag link and a rod end at the rear. Under acceleration they would toe in because the rubber would deform making them more stable but causing lots of understeer under throttle in a corner. Geometry and torsional stiffness are very important no matter what tire you are using. Bump steer can be used to advantage but only in specific cases because it makes the car unpredictable under other conditions. It is much better to get it right and then tune with springs, bars, roll axis, shocks and aero ( if you can). One reason that modern Mustangs, Camaros, Corvettes and Vipers are much better than older Muscle cars including Cobras (on the same tires) is that manufacturers are paying attention to suspension geometry now.