| Understanding Sound In the racing world today, there are many race tracks throughout the country that are under siege from neighboring communities. These communities are trying to close down our race tracks because of noise pollution. It’s time that all of us in the racing community start becoming pro-active by policing ourselves when it comes to noise pollution. .... Click here to continue
How much HP will I lose? With the proper mufflers for your engine there should be no horsepower lose. In most applicatons we have found there is a horsepower gain thru the mid range of the power band.
Why does it cost More? True performance mufflers cost a little more because of the material that they are made of. The small amount of the additional cost is more than worth it. You don't want to spend all that money on building an engine and give away horsepower when you install it in the car and put cheep mufflers on it. Alway remember it's the horsepower at the rear wheels, that makes a winner - not the horsepower on the dyno.
Backpressure When it comes to an exhaust system, backpressure typically reduces performance. “The backpressure on the exhaust flow can help to reduce sound, but at the same time, it limits engine power. “This power reduction comes from an inefficient burn in the combustion chamber, where spent exhaust gasses are backed up into the combustion chamber and contaminate the next burn cycle.” What causes backpressure? “It is often the result of restrictions to exhaust flow,” which results in pressure buildup in front of the restriction. Turbulence entering or leaving a system component or abrupt changes in the direction of exhaust flow may also add to backpressure in the system.” A second problem associated with backpressure is heat buildup. ... The heat builds up in the muffler and then backs itself up through the entire exhaust system to the exhaust manifold and engine. This heat retention can cause damage and horsepower lose.
Bigger Is Not Always Better
When an engine has too big of exhaust tubing and mufflers, it was cool the exhaust gases down and actually slow down the exhaust speed - creating a loss of horsepower. Too small of an exhaust system will create back press creating back pressure.
Racing vs. Street Mufflers Many racing series now require mufflers, so it’s only natural that manufacturers have created some ultra-high-performance race-only designs. The good news: Bolting mufflers on a race car doesn’t have to harm its performance. Uninterrupted highest flow design allows straight-through design has been tested again and again to actually out-flow a straight piece of pipe.” Running mufflers on a race car also has been shown to reduce driver fatigue, which is important in longer oval track and road course events. Plus, with a quieter exhaust, you can better hear what the rest of your race car is doing. Most racing mufflers feature a straight-through absorption design, but there are some cancellation-type mufflers available, too. Racing mufflers typically come in round and oval. Durability is another concern. Running at high rpm’s for a prolonged period can be tough on a muffler, so some race mufflers feature durable materials inside and out plus a completely welded case. Weight is always a big issue, we offer so of the lightest racing mufflers avaiable. Check our list of Distributors or call us at 805-584-2984 Monday-Friday 8-5 PST. |
