<P> Rusty Wallace tested a car at Talladega Superspeedway without a restrictor plate in 2004 , reaching a top speed of 228 mph ( 367 km / h ) in the backstretch and a one - lap average of 221 mph ( 356 km / h ) . While admitting excitement at the achievement , Wallace also conceded , `` There 's no way we could be out there racing at those speeds ... it would be insane to think we could have a pack of cars out there doing that . '' </P>
<P> Rusty Wallace tested a car at Talladega Superspeedway without a restrictor plate in 2004 , reaching a top speed of 228 mph ( 367 km / h ) in the backstretch and a one - lap average of 221 mph ( 356 km / h ) . While admitting excitement at the achievement , Wallace also conceded , `` There 's no way we could be out there racing at those speeds ... it would be insane to think we could have a pack of cars out there doing that . '' </P>
how fast would nascar cars go without restrictor plates
how fast would nascar cars go without restrictor plates
228 mph ( 367 km / h )
228 mph ( 367 km / h )