why dont race cars like nascar use mufflers ?
145223
So you can hear the cars even production based races will modify the exhaust to make some noise plus power even though some back flow pressure is good for a engine
1134526
I'm pulling for the Audi's---to prove that auto racing will remain exciting, even as we have to use new technologies to race.  The Penske Porsches are not running LeMans--only in the US.  Plus in P2 on a wide open course like LeMans they would only win by attrition.  The Mulsanne straight is about 3 miles long---they give away too much power to the P1 cars.  Their agility and weight doesn't help here.
1177813
no they don't. check this...\nTreadless Design\nNASCAR tires look completely bald, but that's not because they are worn out. It is by design. On a dry track, tires can generate more traction if more of their sticky rubber is in contact with the ground. Putting a tread pattern on the tire helps in wet weather, but in dry weather it is better to have the whole tire touching the ground. That's why NASCAR races stop whenever the track is wet.
243685
I think Nascar needs the following improvements:\n\n1) A track that isn't ALL lefts or rights! Mix it up some, fellas!\n2) Land Mines\n3) Concrete pillars that randomly eject up from the track\n4) Speed bumps\n5) No more yellow flags! They're professional drivers - let 'em navigate around car parts!!!!
1105380
some do..some don't. it depends on the kind of racing.. kind of be stupid to put them on something that it's just going to get knocked off of.
645597
The cars are set up for qualifying to put out the most power for a short period of time for qualifying, since the car can be qualified essentially in one lap.  But, for the race, we "de-tune" the car so that the engine and transmission will last the entire race. You cannot win if you do not finish.  If we tried to run the entire race on a qualifying tune-up, the engine will "blow".
261110
So other drivers can see the car ahead of them through smoke from tyres, or from water spray.\n\nHitting another car at 140 mph is never fun.\n\nIt is not as many people think, a brake light, they are not road legal cars, so they do not need one, or indicators, or fog lights etc. etc.
232819
You can't go wrong with a high flow exhaust and a high flow air filter, it helps the engine breathe a lot better and should also increase economy.  It might be a bit louder though...
654427
Modified exhaust is illegal...that is, when it increases the decibl level. \n\nMotorcycles are exempt.\n\nMuscle cars get pulled over just as much. You just happen to drive a Honda
249346
It is more fun on a small track live.  I have been to Daytona and you can't see the whole track.  Plus, they go by so fast you only see a blur.  Small tracks are better because you can see everything.
1182630
Some NASCAR sites claim that it is for the safety of the driver, racing that way keeps him as far away from the wall as possible.  But a lot of sites claim that car and horse racing are counter-clockwise as a protest to the British from years back...\n\n"It is felt that the American practice of racing counter-clockwise began at this track, in response to anti-British feeling at the time. The British raced in a clockwise direction."
682473
Cars are aerodynamic to reduce wind resistance but this does not create the Bernoulli effect necessarily.\n\nIn fact cars, especially race cars, are designed like upside down aircraft.  Instead of lift, they use the Bernoulli principle to create a down force.\n\nIf cars were round on the bottom and flat on the top then the Bernoulli principle would kick in and create lift.  Probably not enough lift to make the car fly but probably enough lift to make it uncontrollable on the ground.
237691
depends on what muffler u get. many do a great job, look at ones from Flow master, Borla ,Hooker just to name a few. They all have specs on what they sell. After market Headers will inprove the over all flow of exhaust gas as long as u upsize the down pipe and main pipe all the way back to the muffler. Use only stainless steel and stay away from the cheep crap.  also get a NEW o2 senser so the computer can know what is going on. Bosch makes a good one.
340344
I went to the race in Martinsville just a couple of weeks ago, and to a certain extent, you are right. It used to be a very enjoyable experience. Now, it's kinda iffy. Way too many people are crammed into the little bleachers and the weather can be tricky in April. Since the NASCAR season goes almost all year long, there are some times when you fry at a racetrack and there are some times when you throw snowballs at each other. I go to see the speed and smell the exhaust. Two things that the TV cameras cannot bring into my home. I have always said that alcohol should be banned inside gates, but that may never happen because of the promotion of beers on the track. However certain tracks (like Charlotte) have a section of grandstands that are "family friendly"; no smoking or drinking in those areas. You may want to look into those next time.
1073979
Nascar will never shut down. It's fan base is huge, it's interest by driver's, owner's, manufacturer's, and sponser's is waaaay to big. \nIt will only grow bigger and bigger. As the generation the grew up on it ages the numbers might shrink some, but you'll see a surge shortly therafter.
134370
I agree....remember, thats why people race manual cars. Because they want speed not torque..Common sense right
111157
to many controls put on the drivers takes away from the ability to race. and can make for dangerous situations. like restricter plate races.  where bumpdrafting is needed to pass puts the drivers in a very dangerous position. and the wrecks can take out severval cars at one time.