Disqualifications Nelson Piquet finished first and Keke Rosberg finished second, but both were disqualified after the cars were found to be underweight. As a result, the
FOCA teams boycotted
San Marino two races later. The problem was with a "ballast water tank", ostensibly used to cool the brakes. This would gradually empty during the race and then be replenished at the end so as to pass post-race scrutineering. The FIA Appeals Tribunal upheld the disqualification seven weeks later and these tanks were permanently banned.
Race classification ==Notes==