I have a 97 Formula with a 6 speed, pretty much stock. My dad just bought a new 2004 Silverado with a 5300 Vortec, How much faster is my car. Also, I know a kid with a 96 Eclipse ESX who says he can take me, can he. I know it is turbo, but i think I can take it. Finnaly, I blew out one of my tires so I bought a generic Z Rated tire, will this mean I can't go as fast.

 

"My dad just bought a new 2004 Silverado with a 5300 Vortec, How much faster is my car."

Much faster!

"I know a kid with a 96 Eclipse ESX who says he can take me, can he. I know it is turbo, but i think I can take it."

Its GSX, and yes if it is STOCK you can absolutely destroy it (mid 15's stock)

"Finnaly, I blew out one of my tires so I bought a generic Z Rated tire, will this mean I can't go as fast."

You can go as fast, but you might blow that tire up doing so! Not worth the risk to me, just keep the speeds reasonable until you can replace it with a Z-rated tire.