What is Negative Pressure Supercharging about?
Negative Pressure Supercharging is about making mechanically simple carbureted or fuel injected street engines produce...
| • | More torque and horsepower from idle to 4500 rpm using low octane fuel |
| • | Faster acceleration |
| • | More towing power |
| • | More fuel economy |
| • | Lower emissions |
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Lower maintenance
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Lower running costs
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...than today's mechanically complex high rpm wonder engines.
For more details see What is NPS? and Performance Improvements
Negative Pressure Supercharging is NOT about...
Negative Pressure Supercharging is NOT about making street engines rev higher to produce more peak horsepower because the drawback with high rpm engines is they...
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DO NOT produce the wide range of performance improvements produced by Negative Pressure Supercharging
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Cost more than Negative Pressure Supercharging
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| • | Reduce driveability, towing power, fuel economy, idle quality and manifold vacuum
| | • | Produce poor low rpm torque which produces poor low speed acceleration
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Increase emissions, maintenance and running costs
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Must use high octane fuel or expensive high octane fuel additives
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Must use many expensive and heavy duty parts to handle the higher horsepower
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Must use race parts or mechanically complex systems to produce respectable low speed acceleration such as...
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4-6 speed transmissions
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4-5:1 diff ratios
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4000-5000 rpm high stall converters
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Long intake manifolds
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Variable intake manifolds
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Roller cams
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Variable valve timing
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Variable valve lift
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Must use expensive pollution control systems to reduce the much higher emissions they produce such as...
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Catalytic converters
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Exhaust gas recirculation
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Vacuum (smog) pumps
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Secondary air injection
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Computers
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Fuel injection
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Negative Pressure Supercharging is NOT about using supercharger air pumps to produce more peak horsepower because the drawback with air pumps for street applications is they...
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DO NOT produce the wide range of performance improvements produced by Negative Pressure Supercharging
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Cost 3 times more than Negative Pressure Supercharging
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Reduce fuel economy
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Increase emissions, maintenance and running costs
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Require the engine to use high octane fuel or expensive high octane fuel additives
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Require the engine to use many expensive and heavy duty parts to handle the higher horsepower
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Require the engine to use expensive pollution control systems to reduce the much higher emissions they produce such as...
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Catalytic converters
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Exhaust gas recirculation
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Vacuum (smog) pumps
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Secondary air injection
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Computers
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Fuel injection
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Negative Pressure Supercharging is NOT about making street engines more mechanically complex because the drawback with mechanically complex systems* is they...
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DO NOT produce the wide range of performance improvements produced by Negative Pressure Supercharging
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Cost 2 times more than Negative Pressure Supercharging
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| • | Produce only small improvements in power, fuel economy or emissions with each system which require making engines more and more mechanically complex in order to improve their efficiency
| | • | Require using more and more expensive computers to operate the increasing number and complexity of mechanically complex systems
| | • | Substantially increase the already high cost of mechanically complex engines to the point that only the rich will be able to afford to buy and repair them in the near future |
* Multi-cams, multi-valves, multi-catalytic converters, variable valve timing, variable valve lift, variable intake manifold, variable exhaust manifold, variable twin turbo, variable compression ratio and cylinder deactivation.
| Impulse Engine Technology
P/L |
PO Box 986 Randwick NSW 2031 Australia
Ph: (02) 9398 5544
Fax: (02) 9398 5644
International: Ph: +(612) 9398 5544
Fax: +(612) 9398 5644
Email Us
Inventor of Negative Pressure Supercharging
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