Switching Tires Hoosier to Racers

[kevpow]

I usually run Hoosiers but have several American Racers that I got when I bought my car. Big race coming up and was thinking about giving them a try. They are similar in compound to my Hoosiers but I was wondering what or if any changes my be needed when changing tire brands?? Any help would be greatly appreciated. Thanks

[phenom08]

Racers tighten the car up a bit