"(It is) straightforward and it is easily reversible if you decided that the quality of the racing was hurt by it," Roush said. "If they want to take 100 horsepower off … reduce horsepower significantly, the least expensive and most palatable way to do that is with a restriction on the intake side."
Today's Cup engines, limited to 358 cubic inches, produce approximately 850 horsepower. Speeds have increased, in part due to a new rules package and the continued development of the Generation-6 car, now in its second year. While officials with the three auto manufacturers currently involved at the series' top level, Chevrolet, Ford and Toyota, have been a part of the discussions, they say it is too early in the process to respond to potential engine changes.
"From an owner's standpoint, NASCAR has got to be mindful of … what it costs," Roush said.
"The race teams can only afford to change so many things at a time. With the expanding technology and the engineering costs that everybody has with the pressure for sponsorship and investment in the sport, a dramatic or unnecessary engine change would not be welcome in my world." More at NASCAR.com