Q: Will lowering tire pressures help over bumpy surfaces?

Q: “I am driving a 2000 Porsche Boxster S at Porsche Autocross events and when I drive my Boxster over a bumpy section my Traction Control comes on and slows my car. I don’t have a switch to turn off the TC. To help with traction should I lower the tire pressure? Would raising the rear spoiler help with this issue as well? The spoiler raises at 75 mph but I can raise manually.”