in 1982 Prudhomme and crew chief Bob Brandt bolted up a fake nitrous bottle with a clearly plumbed line running from an nitrous bottle to the fuel pump– and the team made a great show of “turning on” the bottle on the starting line in front of everyone – the bottle was empty, the system a ruse

Even though there was a clearly plumbed line running from an nitrous bottle to the fuel pump – and the team made a great show of “turning on” the bottle on the starting line in front of everyone – and even though they had done basic experimentation with nitrous in testing, Prudhomme and crew chief Bob Brandt

The fake setup was a smoke screen to mask the new vane-style aircraft fuel pump – as opposed to a traditional gear pump -- that the team had begun running

https://www.nhra.com/news/2012/1982-indy-nitrous-nationals-or-not