First, you should know more about the Car Chassis.
A vehicle’s chassis is the main structures of a vehicle where all the other components are being assembled to the frame. Each vehicle’s attribute were being designed to satisfy the requirements of a desired group of end users.
NORMAL PASSENGERS CARS
Being the most out of street vehicles, normal passenger cars were being formed for a few common goals and comfort is one of them. In order to achieve this, a set of street use suspension and soft spring rate will be fitted. While maintaining the level of comfort, the vehicle would be sacrificing its ride handling.
The vehicle tends to increase in body roll especially during emergency stops which contribute more forces to the front, resulting in poor steering response, stopping power and even result in accidents.
The Differences Between Honda Civic EK3 and Honda Civic EK9
To fit different levels of demand in the market, most of the car manufacturer produce car with different specification. Cars with higher specification often come with enhancements on Power, wheel size, brake system, suspension system and also chassis. The pictures below shows the engine bay of Honda Civic EK with two different specifications. On the top side is 1.6L single overhead cam engine and the bottom side is 1.6L double over head cams with VTEC engine. Higher specification car will come with enhancement on chassis. In this case, you can spot one of the difference is the existence of the front bar, where the main purpose of this bar is to strengthen the chassis.
Honda Civic EK3 without Front Strut Bar
Honda Civic EK9 with Front Strut Bar
Next, you need to know what is Vehicle handling.
UNDERSTEER, the front wheels are likely to slip towards outside of the turn angle, driver can solve it by turning a little more slightly but the handling is reduced, the vehicle’s behavior is less predictable and tires are likely to worn out faster.
Understeer often occurs in front wheel drive layout vehicles.
OVERSTEER, the rear wheels are likely to slide towards the outside of the turn more than the front. The driver must correct by steering away from the corner otherwise the vehicle will tend to spin when it has been pushed to its limit.
Oversteer often occurs in rear wheel drive layout vehicles.
1. As most modern cars go, car manufacturers employ the FF (Front engine, Front wheel drive) setup for improving driver and passenger safety. The natural behavior of an FF car is to have a slight understeer, due to its heavier front end. Understeer happens when the front wheels lose their traction and won’t turn any sharper, even when the steering is being corrected to turn the car more. This will cause the car to go wide instead of following the line. Understeer can be corrected by stiffening the rear end of the vehicle by adding a Rear Strut Bar and a Rear Anti Roll Bar.
2. Oversteer is when the rear tires lose grip and causing the rear end of the vehicle slides out of a corner. This phenomenon happens particularly to FR (Front engine, Rear wheel drive) or RR (Rear engine, Rear wheel drive) cars. Oversteer can be corrected by stiffening the front end of the vehicle by adding Front Strut Bars and Front Anti Roll Bars.
WHAT AFFECTS HANDLING?
When any of the wheels loses contact with the road surface, there will be a deviate in handling; each of the suspension system should keep all wheels on the road surface in spite of hard cornering and in change of steering position. It’s always pleasing that that car can be set for a tiny amount of understeer so that it responds predictably to a turn of a steering wheel and the rear wheels to have a smaller dip angle than the front wheels. However this may not be achievable at all times due to the vehicle load, road condition, weather, speed and this consumes excessive time for the driver to adopt.
STRUT BAR AND LOWER ARM BAR
Part of the shock of impact transfer to the chassis, causing wheel house and lower arm deforming.
Equip with the Ultra Racing’s strut bar and lower arm bar, both side shock of impact will be neutralized.
WHILE ENTERING AT CORNER
The weight transfer and force gathering on one side, causing unstable
handling and increasing body roll.
The force will spread out by Ultra Racing’s strut bar and lower arm bar, stabilize the car and provide solid handling.
The joint between A-pillar and front chassis will be push and twist by the greater shock of impact and drag force, causing damage on chassis.
Ultra Racing’s Fender bar will spread out the force and strengthen the section, prevent further damage and offer stable handling. Recommend for user of sport absorber.
SIDE LOWER BAR
On uneven / bumpy road, center section chassis will have different level of body flex cause by the weight transfer between front and rear.
Ultra Racing’s side lower bar will stabilize the weight transfer between front and rear, it can also minimize the damage from side impact.
ANTI ROLL BAR
When turning in corner, the weight transfer will make the car sway a side, causing body roll and more difficult to turn in to a corner, weaken the steering respond.
The upgrade version of Ultra Racing’s anti roll bar will be more effectively preventing the car sway a side at cornering, greatly reduce body roll and high stability in cornering.
Strut Bars and Anti Roll bars are must if you are looking to improve the handling and safety of your car whether it's for road or track use!