We were trying to get it down. First 5 runs were on the 2.8, we tried to tune out some of the knock, enrichen it a bit, but then they realized their sniffer wasn't picking up the air fuel ratio right, so then we took away some timing, one run he messed it up somehow ( the run that put down 22x something), then it got two decent pulls the 297 and 296. Both knocked still so we put a 3.0 on and added some timing. Still knock, put timing back to stock, still knock.
So we were watching, and trying to tune it out. That and the experience they have had with that sh1tty gas station led them/us to believe it must be a sh1t batch of fuel, plus heat, a little trans slippage (maybe), plus bad luck?
She normally runs basically knock free. I also had it all over SC and NC this last weekend and put 800 miles of sketchy not my home station E85 in it. And drove it for about an hour and a half today right before the dyno.
It seriously was spur of the moment. They had a spot, i took it.