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H&R Coilovers |
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So you have a vehicle that you love to push to the limit at the
TRACK, but you also use the same vehicle to
COMMUTE daily... You want a coilover to enhance your vehicle's
handling performance at the track, but you
fear that your daily commute and comfort will be sacrificed. No worries here, H&R's Coilovers broke away from
traditional twin-tube shock absorbers and engineered a state-of-the-art
mono-tube gas shock construction to bring you the best suspension product
available for your 05+ Audi A3. Using top quality materials, H&R's engineers
modified each coil over shock with a progressive rate spring to provide you with
performance handling and a comfortable drive, all in
one incredible design. |
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Street Performance Coilovers
H&R is the
originator of the true coil over system for the street and continues to
lead the market with an extensive line of applications. Each shock is
tuned with a progressive rate spring that is engineered from its
inception to work with the shockâs valving, creating a finely tuned
suspension system. H&R Coilovers are the suspension answer for
everybody, from daily drivers to the serious tuner.
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Benefits |
- Lowering
range of 1.0 to 2.5 inches on average
- Full threaded
shock body for adjustable vehicle lowering
- Awesome
handling and ride comfort
- Life-Time
Warranty against manufacturer defect
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H&R Exclusive
Rear Height Adjusters
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H&R prides itself on its numerous 'firsts' and
innovations that have revolutionized the suspension industry. One of
H&R's ingenious creations is its exclusive, patented rear height
adjusters. Used for height adjustment in vehicles that have a separate
rear spring / shock setup, the H&R exclusive Rear Height Adjusters in
effect replace the lower rear spring perch with an easily height
adjustable spring seat design. Using a hex key, a simple twist of the
wrist is all that is needed to raise or lower the rear of the car. H&R's
exclusive Rear Height Adjusters accompany some BMW applications.
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Make |
Model |
Chassis |
Year |
Note* |
Approx. Front Lowering |
Approx. Rear Lowering |
Part Number |
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Audi |
A3 2WD, 4 cyl |
8P |
5+ |
Only Fits 5mm Front Strut
clamp, *12, *26 |
1.2 - 2.3 |
1.0 - 2.0 |
29509-2 |
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Audi |
A3 4WD, 6cyl |
8P |
07+ |
Only Fits 5mm Front Strut
clamp, *12, *26 |
1.2-2.3 |
1.0- 2.0 |
29220-1 |
*12 Lowering height will vary on vehicles with factory sport suspensions
such as BMW M-Technik, Mercedes-Benz Sport-line suspension, Audi-Sport
suspension, etc.
*26 When lowering the chassis
more then 1.4", and your vehicle has a 42mm or larger drive shaft your
must use one of H&R's Volkswagen front sway bars to accomplish adequate
drive shaft clearance.
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New Page 2
Coilovers
Q - Will aftermarket coilovers void my
warranty?
A. A dealership cannot "void the warranty on the whole car" just because
you have a CAI (Cold Air Intake) or aftermarket wheels. if they are
trying to deny warranty service, they must prove that the mod caused the
problem. Of course, adding a turbo kit (for
example) can put a lot of stress on the engine itself, as well as to the
drivetrain. Don't be surprised if the dealer refuses to perform warranty
service on a heavily modified car, that's just common sense.
This is all part of the "Magnuson-Moss"
Warranty Act, which protects consumers against shady business practice
by:
"The Act makes it easier for purchasers to
sue for breach of warranty by making breach of warranty a violation of
federal law, and by allowing consumers to recover court costs and
reasonable attorneys' fees."
(In short, if they try to void your warranty and
your mod could not have caused the problem)
More info can be found here
http://www.ftc.gov/bcp/conline/pubs/...s/warranty.htm
THAT SAID, if your mod *did* cause the problem, then it's your problem
and you have to deal with it. |
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Q - What is a Coilover?
A. A coilover suspension
basically gives you a matched lowering spring and shock absorber
combination with the added benefit of adjustable ride height and spring
rates through a moveable spring perch or perches.
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can improve your car's suspension in several ways: |
- Unsprung
mass is often reduced
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Suspension travel is often increased
- The car
can be corner balanced
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Q - Why
are Coilovers superior to a spring and shock combo?
A. As stated above coilovers are a lowering
spring and shock absorber combination, however instead of playing mix
and match, the springs and shocks are designed, engineered, and
developed to work in unison to provide the most optimal performance
possible. Coupled with adjustable height perches, some coilover systems
have the option of adjusting the damping level of the shock absorber
offering even more fine tuning options over an individual spring and
shock combination. |
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Q - Will lowering my car with
Coilovers
cause my tire to rub?
A. Given that the standard wheels and tires are used, there will be no
tire-to-body rubbing. Lowering the vehicle simply relocates the wheels
to a different travel point.
However, when up sizing to bigger wheels and tires it
is important to keep within the original overall outside diameter and
width relative to wheel offset. That is, fitting larger diameter tires
which dramatically increased overall diameter will probably lead to
rubbing. As will increasing width excessively or using the wrong offset.
Simplest rule of thumb is that if it rubs now when loaded, it will rub
even more if you lower it but that's not the coilover's fault. |
Q - Will lowering my car with
Coilovers
cause my tires to prematurely wear?
A. Yes, factory suspension settings are designed to have zero camber,
allowing the whole contact patch of the tire to fully contact the road.
Using an aftermarket coilover system, lowers the car, which in turn moves
suspension arms off factory settings, giving your car negative camber.
This will prematurely wear down the inside of the tires. This can be
fixed however with the use of aftermarket adjustable camber arms, or if
the coilover is equipped with adjustable camber plates. |
Q - Spring Rate, what it is and why is
it important?
A. A spring will be compressed when load is applied.
The distance it is compressed for that given load is referred to as the
spring rate. Spring rate is specified in terms of force applied per
distance of compression. Typically, the units of spring rate are pounds
force per Inch or using the metric Sl system - Newton's per millimeter.
We can just as easily convert the pounds into kilograms and measure the
deflection in millimeters.
If a load of 1 kg
deflects a spring 1-mm, each additional 1-kg will deflect it another mm.
For each kg removed from the load the spring will return one mm toward
its original state. The spring may be loaded at the rate of 1 kg per mm
until it is compressed beyond its capacity. This means the spring will
become damaged and will not resume its original characteristics when the
load is removed. This point is called the elastic limit. A spring loaded
beyond the elastic limit is deformed permanently.
In this example using linear design coils, both
springs have 125 kg's of force applied to them. The standard spring has
compressed 150mm from its original height. It therefore has a spring
rate of 125 kg's per 150 mm, or 0.833 kg's/mm.
The replacement coil however with the same force
only deflects 100 mm. Its rate is therefore 125 kg's per 100 mm or, 1.25
kg's/mm. It is a heavier spring.
Even though the replacement spring is 50 mm
shorter, given the same weight, the ride height will be the same.
However, because the spring is of a heavier rate, it will sag less,
handle greater loads and often perform better in performance
applications. A lowered heavier rate spring may be shorter again to
deliver a lowered ride height with a heavier rate. |
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