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Contour and Focus
SVT Focus
SvtF Handling Question??
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<blockquote data-quote="Primaris" data-source="post: 5500350" data-attributes="member: 9053"><p>It depends on the tire. When I first started to autocross I was using the stock conties. The sidewall was so soft on those tires I had to run 55 psi+ to keep from wearing off the lettering on the side of the tire. With the Avon Tech R's I can run 40's hot. You can verify how much the tires are rolling over by marking the sidewall of the tire with chalk or white shoe polish. Regardless of what happens to the contact patch you never want to be driving on the sidewall. So while you would think adding pressure would cause under steer if you are rolling the tire over you are not getting full traction anyway. So when this is happening adding more pressure actually gets rid of under steer.</p><p></p><p>The class I compete in doesn't allow the suspension modification you are talking about. But, yes if you have the money and the rules allow there is much you can improve with the Focus. Namely a LSD and 2.0 to 3.0 degrees of front camber. The addition of front camber would allow the use of normal tire pressures.</p><p></p><p>The 615's are a great tire autocross, but they over heat way to fast on the open track and become greasy.</p></blockquote><p></p>
[QUOTE="Primaris, post: 5500350, member: 9053"] It depends on the tire. When I first started to autocross I was using the stock conties. The sidewall was so soft on those tires I had to run 55 psi+ to keep from wearing off the lettering on the side of the tire. With the Avon Tech R's I can run 40's hot. You can verify how much the tires are rolling over by marking the sidewall of the tire with chalk or white shoe polish. Regardless of what happens to the contact patch you never want to be driving on the sidewall. So while you would think adding pressure would cause under steer if you are rolling the tire over you are not getting full traction anyway. So when this is happening adding more pressure actually gets rid of under steer. The class I compete in doesn't allow the suspension modification you are talking about. But, yes if you have the money and the rules allow there is much you can improve with the Focus. Namely a LSD and 2.0 to 3.0 degrees of front camber. The addition of front camber would allow the use of normal tire pressures. The 615's are a great tire autocross, but they over heat way to fast on the open track and become greasy. [/QUOTE]
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Contour and Focus
SVT Focus
SvtF Handling Question??
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