1981

Daytona – 1/31
sebring – 3/20
road atlanta – 4/12
riverside – 4/26
laguna seca – 5/3
lime rock – 5/25
mid ohio – 5/31
brainerd – 6/14
daytona – 7/2
sears point – 7/26
portland – 8/2
mosport – 8/15
road america – 8/22
road atlanta – 9/13
pocono 9/27
daytona – 11/29