1991 IMSA supercar series race results

[Rrider]

First race of the season, first win!
http://www.racingsportscars.com/results/Lime_Rock-1991-05-27s.html

When did they put the 300 pounds on them? They did poorly in 92 and they are gone in 93. The rest of the results..

http://www.racingsportscars.com/championship/IMSA%20Supercar.html

[GLHNSLHT2]

based on the results I'd say after Portland in 91. But that's just a theory.

[Reaper1]

They were gone by '93 because they got banned!

[looneytuner]

They were gone by '93 because they got banned!

Sounds likely. Faza racing in Daytona got banned about '72 because their Abarth Fiats didn't lose a race in 2-3 years.