NASCAR should not switch to hybrid cars because they would be able to do the long races and go the distance that they go now. without the hybrid cars they just add more gas and it can go finish the race and with hybrids the race would be allot longer because having to recharge the car half way through the race. and NASCAR started using regular cars off the streets and those cars were powered by good old fuel injected motors and why should that change now
Any argument based on a hybrid reduced performance shows a lack of knowledge about the technology. Most hybrids today do not need to recharge. A hybrid would not sacrifice any peformance to gas only cars, but would in fact be superior. Hybrid cars by Audi and Toyota (diesel hybrids!) have finished AT LEAST first and second at the 24 hours of Le Mans every year since 2012 (some years, 1-2-3). Like Nascar vehicles, these FIA racers go over 200mph. Their combined electric and gas engines produce over 700HP, again just like a Nascar vehicle.
The only argument against use of hybrids is adherence to some vague sense of tradition, recalling a time when Nascar vehicles BASED ON full-size American gas-guzzlers (which were carbureted, not fuel-injected). But this tradition has been long dispensed with: Cars are no longer made of steel. Now Nascar races trucks. And some of the cars and trucks are Japanese (with Korea soon to follow). The obvious evolution is to utilize the newest technology "off the streets" to increase race car performance.