Well, I learned long ago that trying to believe -any- race series is technologically below another is just ridiculous. It's racing. To compete you must use the highest technology allowed or your competitors will and beat you! NASCAR has very stringent specs. mostly designed to keep the costs reasonable while at the same time generating revenue for the racers (sponsership) and giving an exciting event for the spectators. "In the beginning" they used cars off the lots. As speeds rose and as we got smarter (and that's all of us, not just the so-called "rednecks") it became clear that real "stock cars" as driven on the street were just too dangerous to drive at 150-200 MPH! So tube frame cars -looking- like "stock cars" were brought in. The brakes also had to evolve, as a 3500 lb car traveling at 150 to 200 MPH was just overpowering the brakes of the day. They now use "state of the art" brakes, but not the crazy expensive carbon-carbon ones of F1. Even with all this costs began to creep up, so now they have the "car of tomorrow", now the "car of today". These cars are all the same, but for sponsorship purposes, are made to look like "stock cars" using decals. They are the safest cars in racing. The only difference between cars is the engines. They have GM, Chrysler, Ford, and Toyota engines, all V8s of fairly large displacement. Restrictor plates are used to limit HP in an attempt to keep the cars on the ground on certain tracks. It IS cutting edge technology being used, just affordable cutting edge technology. Now after all this, you may think I'm a fan of NASCAR racing. Personally I will sometimes watch "circle track" racing, but I'm not all that interested. But put those cars on a "road track" and I'm there with bells on! Very entertaining watching the drivers try to control a 3500 lb car on a road track! Oh, and make no mistake, most of the NASCAR drivers are very good. They are no better or no worse than F1 drivers. It's just in NASCAR their driving job is going to last much longer than in F1, due to costs and the level of fitness required to withstand the forces the cars impart on the drivers (F1 cars could actually drive on the ceiling due to the high "downforce" they generate, but they cost millions of dollars each, whereas a NASCAR racecar is in the $150,000 area). There is one major reason "circle track" racing is so popular though. From the stands you can follow the car all the way around the track.