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UPS
20.03.2008, 10:19
pt. pasionati..

Drifting refers either to a driving technique, or to a sport based on the technique; this article deals primarily with the sport. When the rear slip angle is greater than the front slip angle, and the front wheels are pointed in the opposite direction to the turn (e.g. car is turning left, wheels are pointed right), and the driver is controlling this, the car is drifting.

Drift cars are usually light to moderate weight, rear-wheel-drive passenger cars. In Japan and worldwide, the most common drift machines are the Nissan Silvia/180SX, Toyota AE86, Mazda RX-7, Nissan A31 Cefiro, Nissan C33 Laurel, Nissan Skyline (RWD versions), Nissan Z-car, Toyota Altezza, Toyota MZ20 Soarer, Honda S2000, and Mazda Miata. US drift competitions feature local versions of those cars (such as the Nissan 240SX and Toyota Corolla GT-S) as well as American performance cars such as the Ford Mustang, Dodge Viper, and Pontiac GTO. Drifters in other countries often use local favorites, such as the early Ford Escort (UK and Ireland), BMW 3 Series (other parts of Europe), Porsche, early Opel cars, or Volvo 700 series (Sweden).

Drifting techniques

The basic driving techniques used in drifting are constant, though each car and driver will employ some subset of these techniques. They include:

Beginner Techniques

These techniques don't use weight transition, so are typically the first thing the novice drifter learns. However they are still used by the most experienced drifters, and require skill to execute properly.

* Hand-brake or Emergency brake drift - While the clutch is depressed, the hand-brake is pulled to induce rear traction loss. As soon as traction is lost, the driver releases the clutch, depresses the accelerator, and countersteers. This is generally the main technique to attempt to drift a FWD car (clutch unnecessary). Also, this technique is used heavily in drift competitions to drift large corners, or to trim the car's line mid-drift.

* Power oversteer or Powerslide - This drift is performed when entering a corner at full throttle to produce heavy oversteer through the turn. The excess power causes the drive wheels to lose traction in a RWD or AWD car. This is the most typical drifting technique for all-wheel drive cars.

* Shift lock - Initiated by downshifting (usually from third to second or fourth to third, and using a very fast shift) instead of braking, without rev-matching, causing the drive wheels to lock momentarily. Helpful for very tight corners, allowing the driver to approach the corner at a slower speed and lower revs, while allowing quick acceleration when exiting the corner. This technique can be very damaging to the engine if mis-used as the ECU is unable to rev limit when the engine is oversped by the rear wheels. Premature downshifters are called "Rod Stretchers".

* Clutch kick - This is done by "kicking" the clutch (pushing in, then out, usually more than one time in a drift for adjustment in a very fast manner) to send a shock through the powertrain, upsetting the car's balance. This causes the rear wheels to slip.

Weight Transition Techniques

* Braking Drift - This drift is performed by braking into a corner, so that the car can transfer weight to the front. This is immediately followed by throttle in a RWD car causes the rear wheels to lose traction. FWD cars can also use this technique as it does not depend on the rear wheels being driven.

* Inertia (Feint) drift, or Scandinavian flick - This is done by transferring the weight of car towards the outside of a turn by first turning away from the turn and then quickly turning back using the inertia of the rear of the car to swing into to the desired drifting line. Sometimes the hand-brake will be applied while transferring the weight of the car towards the outside to lock the rear wheels and help the rear swing outwards. This type of drifting causes the car to accelerate faster afterwards, because of momentum built up while drifting.

* Kansei, Lift off, or Taking In - By letting off the accelerator while cornering at very high speeds, cars with relatively neutral handling will begin to slide, simply from the weight transfer resulting from engine braking. The drift is controlled afterwards by steering inputs from the driver and light pedal work, similar to the Braking drift.

Other Techniques

* Dirt drop - This is done by dropping the rear tires off the sealed road onto dirt, or whatever low-grip surface borders the road, to maintain or gain drift angle. Also colloquially called "Dirt Turbo". [10]

* Choku-Dori - This is done by swaying the car's weight back and forth on straightaways, using countersteer and throttle to maintain a large angle. This is a show maneuver that usually involves many cars following the same line.
Drift Tuning

Drive Train

A proper mechanical limited slip differential (LSD) is essential for drifting. Open diffs and viscous diffs cannot be controlled during a sustained slide. All other modifications are secondary to the LSD. Popular drift LSDs include OS Giken, KAAZ, & Cusco.

The most popular form of LSD for drifting is the clutch type, in "2-way" form; this is preferred for its consistent and aggressive lockup behavior under all conditions (acceleration and deceleration). Some drift cars use a spool "differential", which actually has no differential action at all, the wheels are locked to each other. Budget drifters also use the welded differential, where the side gears are welded to give the same effect. This makes the car very easy to slide at high speed, but difficult to park, and is hard on the driveline. Torsen (available on cars such as S15, FD3S, MX5, JZA8x) diffs are adequate, but not generally available aftermarket.

The clutches on drift cars tend to be very tough ceramic brass button or multiple-plate varieties, for durability, as well as to allow rapid "clutch kick" techniques to upset the balance of the car. Gearbox and engine mounts are often replaced with urethane mounts, and dampers added, to control the violent motion of the engine/gearbox under these conditions.

Gearsets may be replaced with closer ratios to keep the engine in the power band. (Japanese drifters confuse the "L" and call these "cross-mission".) These may be coarser dog engagement straight cut gears instead of synchronised helical gears, for durability and faster shifting at the expense of noise and refinement. Wealthier drifters may use sequential gearboxes or sequential adapters to make gear selection easier/faster.

Suspension

The suspension in a drift car tends to have very high spring and damper rates. Sway bars are upgraded, particularly on the rear. Caster is often increased to improve the car's controllability during a slide. Most cars use an integrated coilover/shock (MacPherson strut) combination. This type of suspension allows the ride height to be adjusted independently of the suspension travel. There is no perfect height setting or spring/shock combo for any car, but each driver will have their own personal preference. Many suspension manufacturers offer suspension tuned specifically for drifting, allowing many people to enter the sport competitively.

Bushings can be upgraded with urethane parts. Most Nissan vehicles have a floating rear subframe which is usually fixed in position with billet aluminium or urethane "drift pineapples", to prevent the frame moving during drift.

One suspension tuning method, still popular in Japan, is known as "Demon Camber". It involves setting the suspension with extreme negative camber in the front to reduce slide. Negative camber on the rear would only induce understeer, making the car more difficult to drift. The front of the car having better grip and less tendency to slide, it is easier to swing the rear of the car around to get a good drift angle. However stability, grip, and overall ability to control the car are compromised. It has thus fallen out of favor as a serious performance-minded suspension setup. However, many cars built for show (such as those driven by bōsōzoku) still use this style of suspension setup for its aggressive look. A few degrees of toe-out on the rear wheels in some vehicles (leading edges angled outward) can improve turn-in, and make setting up a drift a little easier.

Generally drifting consumes tires rapidly and multiple sets may be necessary for a single professional event.

Cockpit

Because of the large sideways forces, the driver must be retained firmly by a bucket seat, and preferably five point harness. This allows the hands to merely turn the wheel, as opposed to bracing oneself against the wheel. The steering wheel should be relatively small, dished, and perfectly round, so that it can be released and allowed to spin through the hands as the castor returns the front wheels to center. The locking knob on the hand brake is usually replaced with a spin turn knob, this stops the hand brake locking on when pulled. Some drivers move the hand brake location or add an extra hydraulic hand brake actuator for greater braking force.

Engine

S13 Silvia bay with typical drift mods - including oil cooler, front mount intercooler (pipes only visible), remote oil filter mount, strut brace, camber strut tops, high mount turbo, glove over brake master cylinder.

S13 Silvia bay with typical drift mods - including oil cooler, front mount intercooler (pipes only visible), remote oil filter mount, strut brace, camber strut tops, high mount turbo, glove over brake master cylinder.

Engine power does not need to be high, and in fact if a car has too much power, it can be very hard to handle during a drift. Each driver has their own preference, and drift cars can be found with anything from 100bhp (74kW) to 1000bhp (745kW). Typically, engine tuning is oriented towards achieving linear response rather than maximum power output. Engines also must be equipped with upgraded cooling systems. Not only are the engines pushed very hard, creating lots of heat, but being driven at an angle reduces the airflow through the radiator. For turbocharged engines, intercooler efficiency is similarly reduced. Oil coolers are almost essential. V-mounting the intercooler and radiator improves flow through these components, and keep the expensive intercooler out of harm's way in the inevitable offs.

Steering

With increased steering angle it is possible to achieve greater angle with the vehicle, it will also aid in spin recovery. This is often done with spacers on the steering rack, custom steering racks, custom tierod ends, or machining the spindles. Increased steering angle often requires other modifications as at some point the tire or wheel will come in contact with other suspension pieces or the inner/outer fenders.

Body

Cleaning up severed bars during Drift meet.

Chassis preparation is similar to a road racing car. Roll cages are sometimes employed for safety, and to improve the torsional rigidity of the car's frame, but are compulsory in events that involves the 2+ cars tsuiou runs in the event of a side collision. Front and rear strut tower braces, B-pillar braces, lower arm braces, and master cylinder braces are all used to stiffen the chassis. The interior is stripped of extraneous seating, trim, carpet, sound deadening; anything that is not essential is removed to reduce weight.

Body kits are usually attached with cable ties. When the body kit meets the wall or curb, the cable ties snap, releasing the part, as opposed to breaking it.

As drift cars are pushed faster, aerodynamic tuning becomes more important as well. Rear spoilers and wings usually are useful only in large, open tracks where the cars develop enough speed to create a need for more downforce. Wheel arches are often rolled or flared to allow the fitment of larger tires. Airflow to the engine is critical, so the hood is often vented.

Tires

S13 Silvia - tire stretched over a wide rim, increasing sidewall rigidity. The rim has a high positive offset to increase track.

The cars quite often have different tires on the front and back, and the owner may have quite a few sets. This is because a single afternoon of drifting can destroy a new set of tires. As a rule, good tires go on the front for good steering. On the back, hard-compound tires are used, quite often second-hand ones tend to end up in a cloud of smoke. 15" wheels are common on the rear, as 15" tires are cheap. As a driver gets better, they will most likely want to upgrade the tires used in the rear for a higher grip compound. Although cheap/hard tires are fun purely for their slipperiness and ease of drifting, they quickly become a hazard for high-speed drifts. More advanced drivers require the most grip possible from all 4 tires. Competitive drifters often run DOT approved tires closer to racing tires, which is permitted, with the exception of some major championships including D1GP which only permits commercially available tires that are approved by them. The grip is required for control, speed, and a fast snap on the initial entry. Some companies have started to create tires with special effects for drifting. One such company is Kumho. They recently released tires designed especially for the drifting crowd. These new tires produce colored smoke instead of regular grey smoke when drifted. However these tires are generally not available to the public, and only to drift racing teams at the moment.

UPS
20.03.2008, 10:28
extrem drifting....

http://www.youtube.com/watch?v=S3w3sqVJ8XA


japanese drifting...

http://www.youtube.com/watch?v=viL8A1QCP_U


random drifting...

http://www.youtube.com/watch?v=x7I-EN-xRjs

drifting gone bad...

http://www.youtube.com/watch?v=5083LVMmttw

ENJOY ;)

iZOTOPE
25.03.2008, 12:10
deci nu m-am putut abtine sa nu rad la ultimul filmuletz, arabaii aia is ca popicele pt erhabe :) ahahaha >:)

razvantm
25.03.2008, 14:17
deci e beton ce sa zic =))

J o c k
08.04.2008, 01:11
http://www.youtube.com/watch?v=Utlwrk1IbrE

armando_16V
08.04.2008, 13:31
asta i caca, sa vezi burnout pe 4 roti, asta pe 2 roti e rasuflata, deci bmw u e invechit... :D



http://www.youtube.com/watch?v=JmftpQf8-J0


ia de aci burnout !!

iZOTOPE
08.04.2008, 14:19
http://www.youtube.com/watch?v=_Dfz-FJlRcM

ia de aici :D
audi quattro general lee :D

FNF
10.04.2008, 01:28
"http://www.youtube.com/watch?v=LyWdZNmE5Ek"
nu cred ca exista vreun drift mai spectaculos!

armando_16V
10.04.2008, 10:43
=)) daaa il stiu e si pe la fun ...oricum asta e cel mai criminal drift