Car Tuning

Car tuning

Car tuning is both an industry and a hobby, in which a car is modified in order to improve its performance and handling and improve the owner's driving style. As most cars leave the factory set up for average driver expectations and average conditions, tuning has become a way to personalize the characteristics of the vehicle to the owner's preference. For example cars may be altered to provide better fuel economy, produce more power at high RPM or the ride comfort may be sacrificed to provide better handling.

Car tuning is related to auto racing, although most performance cars never compete. Rather they are built for the pleasure of owning and driving such a vehicle. Another major facet of tuning includes performance modification to the car exterior. This includes changing the aerodynamic characteristics of the vehicle via side skirts, front and rear bumpers, adding spoilers, splitters, air vents and light weight wheels.

Areas of modification

Engine tuning

Main article: engine tuning

Engine tuning as of late has been marketed as the replacement of basic engine components with after-market versions that perform the exact same functions as those replaced while promising an increase in power output.

Suspension tuning

Suspension tuning involves modifying the springs, shock absorbers, swaybars, and other related components of a vehicle. Shorter springs offer an improved lowered look and a lower center of gravity. Stiffer shock absorbers improve the dynamic weight shifting during cornering and normally have shorter internals to stop them from bottoming out when shorter springs are used. Stiffer sway bars reduce body roll during cornering improving the grip that the inside tires have on the surface thus improving handling response. Other components that are sometimes added are strut bars which improve the body stiffness and help better maintain the proper suspension geometry during cornering. On some cars certain braces, anti-roll bars, etc can be retro fitted to lower spec cars from sports models.

For offroad vehicles, the emphasis is on lengthening the suspension travel and larger tires to increase ground clearance.

Lowriders with hydraulic/pneumatic suspensions use another unique kind of suspension tuning in which the height of each individual wheel can be rapidly adjusted by system of rams, even to the extent that it is possible to "bounce" the wheels completely clear of the ground.

Body tuning

Body tuning involves adding or modifying spoilers and a body kit. Sometimes this is done to improve the aerodynamic performance of a vehicle, as in the case of some wings or bumper canards or to lighten the vehicle through replacing bodywork components such as hoods and rear view mirrors with components made from lighter composites such as CRFP. Cornering speeds and adhesion can be improved through the generation of down force which becomes effective at speeds of 120kmh and over.

More often however, these modifications are done mainly to improve a vehicle's appearance, as in the case of non-functioning scoops, wide arches or any aesthetic modification which offers no benefit to performance. Very rarely does an after market body kit improve performance, the majority add weight and increase the drag coefficient of the vehicle and thus reduce its overall performance.

Increasing the wheel base through spacers and wide body kits enhance the cars cornering ability. Lowering the center of gravity is another aim of body tuning dealt with via suspension modifications.

Detuning

Detuning involves returning a modified car to its original factory status. It is akin to automotive restoration. The term Detuning can also refer to the reduction or decrease of performance in a particular area of tuning. An example of this could be where the engine tune is "detuned" to allow for increased traction on a day where the track grip is not sufficient.

Terms

"Streeted" or "Tuner Cars" are Japanese imports, such as a Toyota Supra, Mazda RX-7, Subaru Impreza, and the Mitsubishi Lancer Evolution series. These cars are most commonly modified with the more expensive mods available. The most popular modifications include suspension upgrades, exhaust systems, and turbos.

Legal requirements

Many countries have legal requirements in regard to what car owners can and can't do in relation to vehicle modifications. For example, all vehicles in Victoria, Australia, must conform to construction standards to ensure vehicles provide drivers and passengers with a maximum level of safety.^[1] There are also restrictions for P Plate drivers which can prevent young drivers from driving modified vehicles.^[2]

In the United Kingdom and the Netherlands it is illegal for any car to have blue lights as they are used by the emergency vehicles.

In Scotland and Denmark, it is illegal for any car to have neon underlights on a car as it distracts other drivers. In the Netherlands neon is allowed under the car but only when the car is on display, if the car is on a public road the lights have to be switched off.

Recently, Belgium issued a new law which describes that bodykit parts need to be approved for safety issues.

Sanctioning organizations

Many organizations involved in competitive motorsports establish safety guidelines that far exceed legal requirements when viewed in terms safety. The NHRA, IHRA and SOLO programs all require that vehicles pass inspection to ensure that all regulations are being complied with.

Source from : www.wikipedia.org

History of custom car

History

A development of hot rodding, the change in name corresponded to the change in the design of the cars being modified. The first hot rods were pre-World War II cars, with running boards and simple fenders over the wheels. These were modified by removing the running boards and either removing the fenders entirely or replacing them with very light "cycle fenders". The object was to put the most powerful engine in the lightest possible frame and body combination. The suspension was usually altered to make the car lower; the front was often made much lower than the rear. Much later some hot rods and custom cars swapped the old solid rear axle for an independent rear axle, often from Jaguar. Only rarely was the grille of one make of car replaced by another; one exception was the 1937 Buick grille, often used on a Ford. The original hot rods were plainly painted like the Model A Fords from which they had been built up, and only slowly begun to take on colors, and eventually fancy orange-yellow flamed hoods or "candy-like" deep acrylic finishes in the various colors.

With the change in automobile design to encase the wheels in fenders and to extend the hood to the full width of the car, the former practices were no longer possible. In addition, there was tremendous automotive advertising and subsequent public interest in the new models in the 1950s. Hence custom cars came into existence, swapping headlamp rings, grilles, bumpers, chrome side strips, and tail lights, as well as "frenching" and "tunnelling" head- and taillights. The bodies of the cars were changed by cutting through the sheet metal, removing bits to make the car lower, welding it back together, and adding a lot of lead to make the resulting form smooth (hence the term "lead sled"; lead has been replaced by Bondo). By this means, "chopping" made the roof lower; "sectioning" made the body thinner from top to bottom. "Channeling" was cutting notches in the floorpan where the body touches the frame to lower the whole body. Fins were often added from other cars, or made up from sheet steel. In the custom car culture, someone who merely changed the appearance without improving the performance substantially was looked down on.

Paint was an important concern. Once bodywork was done, the cars were painted unusual colors. Transparent but wildly-colored candy-apple paint, applied atop a metallic undercoat, and metalflake paint, with aluminum glitter within candy-apple paint, appeared in the 1960s. These took many coats to produce a brilliant effect — which in hot climates had a tendency to flake off. Customizers also continued the habit of adding decorative paint after the main coat was finished, of flames extending rearward from the front wheels, scallops, and hand-painted pinstripes of a contrasting color. The base color, most often a single coat, would be expected to be of a simpler paint. Flame jobs later spread to the hood, encompassing the entire front end, and have progressed from traditional reds and yellows to blues and greens and body-color "ghost" flames.

Once customizing post-war cars caught on, some of the practices were extended to pre-war cars, which would have been called fendered rods, with more body work done on them. An alternate rule for disambiguation developed: hot rods had the engine behind the front suspension, while customs had the engine over the front suspension. The clearest example of this is Fords prior to 1949 had Henry Ford's old transverse front suspension, while 1949 models had a more modern suspension with the engine moved forward. However, an American Museum has what could be the first true custom, built in 1932, amongst its exhibits.

With the coming of the muscle car, and further to the high-performance luxury car, customization declined. One place where it persisted was the U.S. Southwest, where lowriders were built similar in concept to the earlier customs, but of post-1950s cars.

Customizers

Examples of notable customizers around 1960 were Bill Cushenberry, the Alexander Brothers, Darryl Starbird, and Pete Chapouris. Several customizers have become famous beyond the automobile community including George Barris (1960s and 1970s) and Boyd Coddington (1990s) thanks to their proximity to Hollywood; Barris designed TV's Batmobile, while Chapouris built the flamed '34 five-window coupé in the eponymous telefilm "The California Kid". Another Barris creation, Ala Kart (a '29 Ford Model A roadster pickup), made numerous appearances in film (usually in the background of diner scenes and such), after taking two AMBR wins in a row.

Notable customs

The most coveted award for customizers is the AMBR (America's Most Beautiful Roadster) trophy, presented annually at the Oakland Roadster Show since 1948. This competition has produced famous, and radical, customs, notably Silhouette and Ed Roth's Mysterion, some of which were turned into Hot Wheels cars, among them The Red Baron.

Others became notable for their appearances in film (such as Ala Kart, The California Kid five-window, or the yellow deuce from "American Graffiti") or television (such as The Monkeemobile, the "Munsters" hearse, or, more recently, Boyd's full-custom "Tool Time" '34, or Pete and Jake's '33 three-window, Eliminator, built for the ZZ Top video). Specialist vehicles, such as the T/A, KITT, from "Knight Rider", are not usually considered customs, but movie or TV cars, because they retain a mostly stock exterior.

Gallery

Rodded '57, typical of late '50s and early '60s. Note the wide rear rubber.	Henry J custom, with hood spike and door pulls painted contrasting color	'56 Ford pickup with Appleton spots	Chrome aircleaner, custom-milled with flames
Flush-mounted Miata doorpull	Custom door lock knob	'56 Crown Vic taillight with '59 Cad spike	Oval LED taillight
Custom oval LED front turnsignal

Source from : Wikipedia.org