This Web site is not just dedicated to building pimped out cars and custom cars, but to building and tuning fast modified street cars and even faster modified race cars. Custom-car.us will provide you with all the information and articles about modified cars, car customization and car modifications that you will need to build really fast modified cars for street use or for track racing. Our aim is to help you modify your car and its engine to improve engine performance and handling by providing you with all the information, tips and advice you would need to select the correct high performance auto parts for your car, to install them correctly, and to tune them. It doesn't matter whether your car modification project entails building really cool custom cars, fast modified race cars, cool modified street cars, or even pimped out cars we will provide you with the information you would need.
Information about engine tuning and car modification can become quite technical, but we attempt to bring you this information in plain English. We make the information as easy to understand as possible so that even the novice can learn about car tuning and car modifications, as well as how to increase engine power. We also guide you through engine tuning, performance tuning and car modifications for all makes of cars, including BMW, Honda, Ford, Nissan, and much more, with detailed, step by step tuning and modifying tips. And if you do get stuck with a technical term, there's always our glossary of modified car terms that you can checkup the term. If that doesn't help, you can always send us a message through our feedback form.
We discuss various techniques of car customizing and various car modifications, as well as the different car tuning methods you can use to increase engine power, maximize car performance, and build great modified cars; including:
The main purpose of an exhaust system is undoubtedly to route the spent exhaust gas out of the car's engine. Along the way the exhaust gasses may be used to drive a turbocharger and now-a-days it will most definitely incorporate a catalyst converter to reduce carbon dioxide emissions. But on a high performance car, such as a modified street car, or a modified race car, the exhaust system is much more important as it has a direct affect on engine performanceengine power. As a result, the exhaust system, and particularly the exhaust header design, plays an important part in both engine tuning and car tuning.
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In general terms, an exhaust system consists of an exhaust manifold (which is sometimes called an exhaust header), a front pipe, a catalyst converter, a main muffler or silencer, and a tail pipe with an exhaust tip. In terms of tuning the exhaust system, the muffler is the easiest to deal with it's simply a matter of replacing the stock muffler with a free-flow or high performance muffler, such as a Flowmaster muffler. The result is a free flow exhaust system. However, the performance muffler must have an inlet and an outlet pipe that is the same size (diameter) as your front pipe and your tail pipe. Your front pipe and your tail pipe should also have the same diameter. The rest of the exhaust system is much more complicated as you need consider back pressure, your engine's power band, and your engine's maximum usable RPM.
In general terms, a supercharger, which is also commonly known as a blower, is nothing more than a large air pump that is driven by a belt that runs off the crankshaft of an engine. Superchargers have been used on car engines for more than a century already, with the German car manufacturer, Gottlieb Daimler, being credited as the first person to patent a supercharger system for an internal combustion engine. His design was based on the twin-rotor air pump designed by the Americans, Philander and Francis Roots in 1859 and patented in 1860. The first production vehicles to use superchargers were built by Mercedes and Bentley in the 1920's.
Superchargers have become quite common in the car performance industry in recent years, and are even installed as original equipment on some new high performance cars. They have become popular because of their cost efficiency and reliability, but mainly because of their performance. Indeed, supercharging a car engine results in huge power increases between 50%100%, making them great for racing and car customizing. In fact, back in the 1980's, there was probably nothing that shouted 'hot rod' louder than a Chevy V8 with a large Roots supercharger sticking out through the hood. But supercharging has come a long way since the 1980's when superchargers were rather inefficient and struggled to make 3 pounds of boost. Today you can walk into any performance parts shop and order any number of efficient Roots supercharger and centrifugal supercharger kits designed specifically for your engine. And with supercharging technology being so advanced, those superchargers could easily double the horsepower of a stock car engine! That's more horsepower than you would ever need! and
A more pertinent consideration should be what supercharger to use, especially with all the different types of superchargers available these days. Choosing the best supercharger for your particular engine can be a bit of a challenge as no single supercharger can be described as "the best". All superchargers work well, and they all have their strengths and weaknesses. What you need is an idea of what you want from the supercharger and an idea of what to expect from each type of supercharger. Especially as different vehicles and different engines may benefit from one type or another; so it's important that you know what you're looking for.
The ignition system is one of the most overlooked elements when it comes to engine and car tuning. Most people think that once their car modifications are done, all they need to do is get the ignition timing right and turn the ignition. But it's much more complicated than that. For one, the spark must be strong enough to ignite the air/fuel mixture. That might sound obvious, but what's not so obvious is that air molecules act as an insulator, and when you modify your car to get more air into the engine, the spark from the stock ignition system might be too weak to effectively ignite the air/fuel mixture, particularly if you're using a forced induction system. In fact poor spark quality can have as negative an effect on engine power as poor ignition timing. In addition, an air/fuel ratio of 11 parts air to 1 part fuel, which is a fuel rich mixture, is most conducive to spark ignition. However, the air/fuel ratio for the proper burning of the fuel is 14,7 parts air to 1 part fuel. Thus, the air/fuel mixture is not ideal for a spark ignition system, particularly during cold start conditions where fuel vaporization is not as effective.
Once the air/fuel mixture is ignited, the rate at which the flame passes through the combustion chamber becomes important if you want to unleash the maximum power from your engine. If the flame travels too fast, it would place too much load on the pistons, conrods and bearings; if the flame travels too slowly, not enough force would be generated to create maximum power at the wheels. There are three things that influence the rate at which the air/fuel mixture burns and the flame passes through the combustion chamber:
Nitrous Oxide (N2O), or NOS as it is commonly referred to, is a quick and easy performance boost for any motor vehicle, regardless of whether it's a car, a bike, a boat or a plane. In technical terms, Nitrous Oxide is a chemical compound that consists of two Nitrogen atoms and one Oxygen atom. However, Nitrous Oxide does not occur naturally as a chemical compound but has to manufactured by applying heat and a catalyst to nitrogen and oxygen compunds. Nitrous Oxide was first discovered by the British chemist, Joseph Priestly, in 1772 but it wasn't until 1942 that Nitors Oxide was first injected inon an internal combustion engine to boost the power output from the engine. Nitrous Oxide is not combustible and is in liquid form when under pressure. When it is released into the combustion chamber the pressure is removed and the Nitrous Oxide becomes gaseous, releasing extra Oxygen that allows your engine to burn more fuel during the combustion process. At the same time, the chemical process of changing from a liquid into a gas absorbs lots of the heat from inside the combustion chamber, reducing the chances of detonation and pre-ignition. NOS thus provides an instant but relatively safe performance boost.
The major advantage of NOS is that it is relatively cheap when compared to all the other forms of car modification and the amount of work involved to install a full nitrous system is far less than that of installing high performance cam shafts, turbochargers or superchargers. The only drawback is that you must refill your Nitrous Oxide tank. Nitrous Oxide is stored in a pressurized tank to keep it in a liquid state. Unfortunately, Nitrous Oxide refills are not as freely unavailable as gasoline and must be purchased from an authorized dealer. The relative low cost15° angle to ensure that the last of the gas is used and none is wasted. The plumbing is also very intricate and can be very tricky to a first time NOS installer. of installing a NOS system makes it an ideal power boost project for anyone who can read and understand a little simple physics. As with anything in life, if you don't do it right, you're going to get problems. There is also more to installing NOS than just bolting a NOS tank to your trunk and connecting a long tube to your engine. The bottle has to be mounted at a
None the less, in this custom-car.us NOS guide, we will explain the physics of nitrous oxide injection and show you how to install a NOS kit and how to test and tune NOS.
Custom-car.us is all about engine tuning and car performance; so if you want to know about car tuning, how to increase engine power and how to modify your car, then you've come to the right place. However, before we can start talking about engine tuning and increasing engine power and torque, we first need to have a basic understanding of how an internal combustion engine produces power. Therefore, over the next few pages of this section, we'll discuss the various basic concepts and principles of the internal combustion engines and the common terms used to discuss engine modifications, such as volumetric efficiency, engine displacement and air density as all of these influence engine power and performance. We also have a glossary of car modification terms that you can check for the meaning of some of the terms we use on this site. Once we have a clear understanding of how a four stroke engine produces power, we can move on and start make our P.L.A.N.s to increase engine performance.
Although there are two types of internal combustion engines, namely the two stroke enginefour stroke engine, we're only interested in car performance and since the two-stroke engine is not used on cars, we won't be discussing that engine here. Instead we'll focus out attentions soely on the four-stroke engine because custom-car.us is all about car tuning and because cars use the four-stroke engine and not the two-stoke engine. If you're looking for information about the two-stroke engine, you could try How Stuff Works or WikipediaThere are also numerous derivatives of the four stroke engine – diesel engines, petrol engines, four cylinder engines, straight sixes, boxer engines, rotary or wankel engines, turbocharged engines, supercharged engines, etc. With the marked exception of the rotary engine, all four stroke engines have a common basic design – they all consist of individual cylinders with pistons that are connected to a flywheel by a crankshaft, and they all make use of what is known as the Otto Cycle. This makes it fairly easy to discuss basic engine power concepts as we don't need to concern ourselves with V's and straights, boxers and horizontally opposed engines. Instead our discussion can and will be all about the four stroke internal combustion engine. In addition, the deisle engine has had a resurgence in recent years and has become more of a performance engine, especially the turbo-diesel engine. A lot of what we discuss here can be applied to modern diesel engines but there are some aspects of engine modification that are specific to diesel engines; for this reason we'll discuss diesel engines and diesel engine modifications on their own. and the
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