Conversions

Performance conversion is a process whereby the performance of an engine is optimized and due to mass production in the manufacturing industry, most engines seldom perform at its peak in the standard condition.

If a vehicle has been identified with the potential for increased performance, the exhaust system is replaced with a free-flow system to enable the removal of outlet gasses at the fastest possible rate, and the air intake system is modified to ensure optimum air flow through the system.

Carburetor vehicles:  The working of the carburetor is investigated and modified to ensure optimum air flow and fuel mixing in the carburetor.

Fuel injected engines: The engine management system is remapped and fitted with a Unichip that will ensure optimum management of the fuel injection and ignition system.  The gas flow through the cylinder head is analysed by means of a flow-bench.  The gas flow analysis identifies areas of pressure drop due to changes in direction, changes in air-pass cross-section, and misalignment.  Any gas flow “obstacles” in the cylinder head is carefully removed by rounding the corners and polishing the air ways, to ensure the unobstructed flow of air through the cylinder head with minimal material removal.  The valve cams are re-profiled to obtain longer valve opening periods for optimum air intake and exhaust gas removal. The vehicle is finally dyna-tuned for optimum performance.

The engine of your vehicle will produce more power and torque if more air and fuel mixture can be combusted in the engine. By increasing the engine capacity, the engine performance is increased. The performance can also be increased without increasing the engine capacity by increasing the rate at which air/fuel mixture enters the engine and exhaust gas exits the engine (improving thus the engine ability to breathe).

This principal is applied when doing a performance conversion. All obstacles that retard the flow of air through the air intake system are removed and the cam profile is changed to ensure optimum valve opening time for maximum air flow into the engine. In turbo-charge engines the air flow can further be increased by cooling it down to increase the density, before entering the engine. This can be achieved by fitting an intercooler between the turbo-charger and the engine. The removal of exhaust gas is facilitated by altering the exhaust-valve cam profile and fitting a high performance free-flow exhaust.

Performance conversions is not only done on rally vehicles and street race cars, but also on towing vehicles (for extra torque), extra power in safe overtaking, or just overall improved performance for improved fuel efficiency.

Advantages of a performance conversion:

•             Improved fuel efficiency

•             Improved torque for easier towing

•             Improved acceleration for safer overtaking

•             Gain in altitude power loss plus performance benefit