Dave

Pretty obvious for other teams to spot though. I think weight would be the most likely. Last stint have more fuel and heaviest driver on the team finish it out. Other sessions be underweight.
What Kirk said .... Plus

Page 5 / S P E C I A L . E V E N T . R U L E S / 7. Car Modifications
With the exception of consumable items (fuel, oil, water, tires and brake pads), nothing may
be added or changed on the car in the last hour without the permission of the Chief Steward or representative.

This provision was added several years ago after a team was observed placing a spare tire in their car with about an hour to go. The car was weighed with and without the spare tire in post race impound. Much to the relief of the crew, the car made weight by about three pounds without the spare tire. We do what we can to level the playing field.

See ya at races

Terry