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| EXHAUSTS |
Performance Free Flow Exhausts | Catalytic converters
Exhaust branches, headers, manifolds
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| Exhaust
Magic at SAC |
Our exhaust systems
have come a long way from the early eighties. |
Many
hours of development and testing have resulted in
superior quality custom built free-flow performance exhausts, branches, headers, manifolds, downpipes
& silencers. |
Our big advantage in this industry
is that we are able to offer a Dyna
test with the system if required or even a optimisation
"tune" to guarantee best results. |
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| The way we do it |
The existing exhaust
system is replaced with a custom built free-flow
system. |
The new system is routed the same
as the original and is supported by the same hangers. |
Visually the systems may look the same but the difference
is in the diameter of the tubing and the construction
of the silencers. |
The new exhaust system allows
the air to be scavenged from the engine more efficiently,
without compromising the comfort of reduced noise
levels inside the vehicle. |
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| Catalytic
Converters |
The fact being however
that very little people actually understand the
subject or even know how a "Cat" looks. |
Over the past few years, catalytic converters have
been a point of discussion in many workshops, group
debates, arguments, etc. |
Herewith some useful
information. |
The engine's exhaust
emissions can be influenced at three points. |
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The first option
is to adjust the mixture formation |
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The second possibility
is internal modifications in the engine itself
(such as optimised combustion-chamber design) |
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The third alternative
is post-combustion exhaust-gas treatment downstream
from the engine |
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The chief priority
on the engine's exhaust side is to complete combustion
of the remaining unburned fuel. |
This is the function
of the catalytic converter. |
The converter supports
secondary combustion of CO and HC to form non-toxic
carbon dioxide (CO2) and water (H2O) while simultaneously
reducing the exhaust-gas-borne nitrous oxides (NOx)
to neutral nitrogen (N). |
Catalytic treatment is
much more effective than processes such as purely
thermal secondary combustion in which pollutants
are burned out in a hot flame. |
The catalytic converter
assists in converting over 90% of the pollutants
into harmless constituents. |
The three-way catalytic
converter reduces all three pollutants - CO, HC
and NOx - at the same time. It features a tubular
ceramic support surface with a noble metal coating
that usually consists of platinum and rhodium. |
The
platinum and rhodium accelerate the chemical reduction
of pollutants as the exhaust gas flows through the
unit. |
A blocked or destroyed
catalytic converter will definitely reduce the power
output and negatively influence fuel consumption. |
If a catalytic converter is installed, it is essential
that unleaded fuel be used, as lead destroys the
catalytic properties of the noble metals. |
The point
is, leaded fuel and catalytic converters cannot
work together. |
SAC is producing
a Product Information Brochure on leaded and unleaded
fuel. It should be available soon. |
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Exhaust Pipes, Branches, Headers, Manifolds and Wildcat exhausts available for most
petrol & diesel vehicles including Alfa, Audi, BMW, Chev,
Chrysler, Colt, Ford, Honda, Hyundai, Isuzu, Jeep, Kia, Mazda,
Mercedes, Mini, Nissan, Opel, Toyota, VolksWagen and more... |
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