How does a rear spoiler of a car makes the car performs better?

Question

Some car enthusiasts spend a lot of money adding skirts (bodykits) and spoilers. Does it really make a difference in the car's performance as a whole?

Answer 1

aerodynamics

Answer 2

the rear spoiler hepls in a few diferent ways.
# 1 it makes the car a little more areodynamic.
( that is a fixed rear spoiler ).

# 2 it pushes down on the rear end of the car to help the rubber
or tires grip the road better.

# 3 an actual working or moving rear spoiler is hooked up
to the engine of the car, so the faster you go,the more it moves
to a position to keep those rear wheels gripping the road.

if you have ever watched rail car racing the rear spoiler
on these cars move,to accomodate the speed or velocity
of the vehicle.

my cousin had a (general lee ) charger,and the rear spoiler
was not a rigid spoiler but a moving one.

although most cars today have a rigid rear spoiler
because it adds style and looks to the vehicle.

Answer 3

Some people have it right (except for the cooler part) when they say that a spoiler is essentially useless. It's impractical on many cars today, as you really need to be seeing speeds in excess of 100mph for it to even start to make a difference. Even then, it's minimal. On top of that, a lot of the ones out there are for front wheel drive cars...here, it's absolutely useless. In fact, it's actually detrimental to have one on a FWD car as the faster you go, the more force is applied to the BACK of the car. What good is that when the drive wheels are up front? The purpose of the spoiler is downforce, essentially MAKING the wheels have traction, and more-so at high speeds where traction is most important.

As for the body-kits, well, sure, there is some amount of aerodynamics involved, but again, almost all of the cars getting these kits today will never see the speeds that make those kinds of aerodynamics effective. It's more for looks than anything...even though my personal opinion is that almost all of them are ugly as sin.

In general...NO...none of these upgrades are going to make any significant or noticeable performance advantages.

The chicken wire grills, the extra-wide kits, the HUGE foglights and towering (useless) spoilers...man...cars are awful looking anymore. I can't wait for this fad to end.

Answer 4

airdams and side skirts work well, but my feeling on spoilers other than high speed handling, is they just cause drag.
for instance the slalom car, spoiler makes the car turn? no, sway/anti roll bars and a good alignment tech does this.
drags, if your spoiler is working at 45-60, its a boat anchor at 120.
it might give the feeling of the rear being planted, but a good set of shocks and a nice matching camber and maybe antisway adjustment might do the same.
what im getting at is mileage+performance. the natural shape of the car should press it down to the road as it moves(hmm sideskirts do this.you get quite a bit of air under you,choppy at best, and unpredictable.side skirts all but eliminate this.keeping the car low and the chasis loaded. now an aftermarket spoiler or an unadjustable boat anchor of any size, will force the rear down(and drag,dragging aint drag racing),causing the front to raise. the dense air that slips underneath the airdam, will combine with air that cannot escape through the vents behind the hood, warming it all as it mixes and compresses becoming less dense and allowing the rear to drop even further.
hope this helps. if you aint dragging at 112+trap spd, remove the drag and weight.
oh i forgot the cool factor, keep it if you like it, but that airplane aint gonna fly without a prop.

Answer 5

usually the body kits will help prevent air currents and disruptions underneath the car that might break the tires loose and/or create more drag. Spoilers use the force of the air coming over the roof of the car to put down force on the rear of the car pushing the back tires down onto the road for more traction.

Answer 6

In theroy it creates down pressure on the rear of the car allowing for better traction in rear wheel drive models.
Most of the ones you see on the street these days are on bumble bee ricers with front wheel drive and tend to be added based on asthetics rather than aerodynamics.

Answer 7

it makes the car more arodynamic and it will push the back of the car down so it hugs the road better, it you have a rear wheel drive car then it would increase the traction that the drive wheels have.

Answer 8

Unless you are using your car as a race car going well over 100mph all that stuff is just for looks.

Answer 9

at regular speeds, even at highway speeds, the spoiler does exactly nothing (except make your car look cooler!)