Why do front wheel drive 1/4 mile (dragstrip) cars need wheelie bars ?

Answer 1

When the tires spin, centrifical force expands their diameter. The wheelie bars force the weight of the car onto the tires for better traction.

Notice that they don't touch at a standstill, but are close to the ground. Upon launch, the front tires expand and force the wheelie bar to touch. This puts the pressure on the front.

Answer 2

The other posters are wrong. When any car leaves the starting line really hard all of the weight shifts toward the rear of the car. Wheelie bars are set up to push against the ground and force the weight back over the front wheels by changing the center of gravity. Front wheel drive cars don't have to have them but if they didn't then they would never get as much traction on the front wheels front wheel drive cars would NEVER be able to flip over backwards. Some people with rear wheel drive cars also use wheelie bars that are set up a little different in order to make sure that the weight stays over the rear wheels. Some extremely light and powerful rear wheel drive cars do have the ability to lift the front wheels off the ground but only rarely would they ever flip over backwards. Besides a backflip would lose the race and do a bunch of damage to the car.

Answer 3

If your car produces a lot of HP and torque, when you take off at a tree, all the weight is pushed to the rear end of the car. If your back tires hook like hell, then you will be seeing the sky, instead of the end of the track . The wheelie bar is a safety feature, that stops the car from hitting the bumper and tearing up the car or even flipping over. Some people also use these for tuning on the chassis, if you can get a small tire car to barley come back on the wheelie bar, then you can take it off and run in classes without wheelie bars.

But to be honest a real hardcore racer, will ride out a wheelie. That's what the fans are there to see.

Go check out some races from the NMRA. I have seen many cars flip all the way over onto the roof and many stand up on the bumper and lift all four wheels off the ground.

Also there is one track that holds an event just for the purpose of wheelies and to see who can tear there car up. Whoever has the biggest and baddest wheelie wins. Its pretty cool. Check back issue of Hot Rod or Car Craft Magazines for the coverage. I can't remember the name of the track.

Answer 4

No, because the power is pulling not pushing the car. If there is to much power the front tires simply lose traction.
Where as rear wheel drive car are being pushed from the back. So the more power applied, produces more pressure on the drive tires, giving the need for a wheelie bar.

Answer 5

TRACTION The "wheelie" bar keeps the back up and front tires down on the ground. The car's weight stays over the front drive wheels, pushing them to the ground for maximum traction and power transfer. Otherwise, massive wheelspin.

Answer 6

FWD's tend to understeer.Understeer happens while the front wheels start to plow on the instant whether you have the steerage wheel became. front-wheel-tension automobiles are in threat of understeer because of the fact potential is being sent to the comparable wheels that steer the vehicle, and while the tires initiate spinning there’s no grip to lead. in the experience that your front tire tread has ever been packed with snow or airborne dirt and dust, you recognize the sensation of understeer because of the fact, as you turn the wheel, the vehicle keeps occurring the instant... RWD's tend to oversteer. Oversteer is the tendency for the rear end to slip out or fishtail. In accountable in many situations occurring utilising, there’s no reason oversteer could desire to be a project. In rain, snow or airborne dirt and dust, even with the shown fact that, the rear end of rear-wheel-tension automobiles can creep out on you. Traction and stability administration can decrease that fishtailing. The exhibition sport of drifting is an interest that revolves around oversteer; drivers pitch their particularly-outfitted automobiles sideways and smoke the tires at severe speeds. yet while your no longer racing you shouldnt could desire to worry approximately this

Answer 7

Skip waiting rooms. When you have an consultation, check in and then go for a walk until the actual receptionist phones you.

Answer 8

Skip waiting locations. When you have an visit, check in and then go for a walk until this receptionist phones you.

Answer 9

Good question, since the torque is pushing down on the back of the car...

Answer 10

Walk between stores that have been in close proximity (don't drive).