Decades of race experience go into the development of these engines. They tach higher and have unique ways of porting air into and out of the engine. This is what gives F1 and IndyCar engines the different sound. … The difference is because NASCAR uses engines with large combustion chambers and lower rpm engines.
Why do cammed cars sound different?
“Cammed” means that they put in a different camshaft. The sound changes because the cam is the heart of the engine. It dictates how much air is taken in and put out and for how long, to put it bluntly.
Why are race cars so loud?
Why Are Race Cars So Loud? Race cars don’t have mufflers. … It’s because the way mufflers work slows down the airflow out of the engine. You can’t put air into the engine until the air from the last cycle is exhausted.
Why do F1 engines sound different?
The difference in noise is present for a variety of reasons, from engine layout to the fuel used, gear ratios, the exhaust layout, age of components and other smaller details. What’s even more surprising, though, is that cars using the same engine sound different too.
Why do drag cars lope?
This is due to valve overlap. The exhaust and intake valves stay open at the same time longer on a muscle car engine than on a normal car engine. This helps with scavenging where on high rpms the exhaust gasses leaving the cylinder help draw the intake gasses into the engine.
Does adding a cam increase horsepower?
Performance cams increase the duration and timing of the valve openings during the engine stroke, increasing horsepower and making your car accelerate more quickly. You’ll idle slightly rougher with a performance cam, but get a throaty rumble that’s desirable for some gearheads, depending on your vehicle.
How much HP does a cam add?
Toward the end of the powerband, it adds about 20 RWHP. This is without tuning. I’m sure more could be eeked out of it with some good tuning. Other cams can add as much as 50 HP or more, but the more power you get from a cam, the higher up the powerband the power usually starts.
How many decibels can kill you?
150 decibels is usually considered enough to burst your eardrums, but the threshold for death is usually pegged at around 185-200 dB. A passenger car driving by at 25 feet is about 60 dB, being next to a jackhammer or lawn mower is around 100 dB, a nearby chainsaw is 120 dB.
How loud can a human yell?
Human screams can be quite loud, possibly exceeding 100 dB (as of March 2019, the world record is 129 dB!) —but you probably want to avoid that because screams that loud can hurt your ears!
Why do guys rev their engines?
Its an attention getting device, revving the engine is used to encourage you to look over to see what’s happening, doing this will allow the driver to see your face, thus identifying you, unless the same driver repeatedly does this to you it should be accepted as no more than that.
Why did F1 get rid of V8?
First of all, FIA, the governing body, decided at one point, that 3.0L V10 engines were too strong and wasteful, so they decided to reduce them to 2.4 V8. … Engines were reduced again, to 1.6L turbocharged and had another batch of limitations slapped on them.
Why are F1 engines so high pitched?
F-1 engines can rev up to 20,000 RPM. The high velocity and flow of air and fuel, combined with the high frequency rate of detonation of the pressurized fuel/air mix, the crisp resonation of the exhaust, all operating at extreme levels make that high pitch sound.
Why are there no V12 engines in F1?
FIA president Jean Todt says Formula 1 cannot return to louder V10 or V12 engines in the future, because he believes the move would “not be accepted by society” … “I’m sure if you said, ‘let’s go back to engines from 10 years ago’, many manufacturers would not support such a move.
What gives a cam a choppy idle?
Overlap causes misfires at idle and that makes the lope or choppy idle. It causes a lot of intake reversion which causes the engine to basically choke on it’s own exhaust during idle. The more the overlap the more the lope will be.
Why do old muscle cars sound better?
Old muscle cars are large displacement (lots of air) pushrod V8 engines. They were simple, crude, and worked. They make that sound as a single valves opens to exhaust the air. Making the blub, blub, blub sound.
What makes a cam lumpy?
what makes the cam have that lumpy sound? The overlap of the exhaust valve closing and intake valve opening causes the engine to be inefficient at low speed which results in the lumpy idle. The closer the Lobe Seperation Angle the more the overlap, the more duration the more (typically) the overlap.