An open cone filter could give less power than standard air filter, if standard air filter is not a restriction. The idle temperature was taken by running the engine up to operating temperature with the bonnet open. The cold air feed was routed to receive air from the bottom of the car but the feed ran close to engine and exhaust. Cold air intakes and sealedinduction kits such as the Viper from Pipercross combine an induction kit with a sealed enclosure. This enables the engine to breathe in colder air than even the standard intake system as well as being freer flowing than the standard paper air filter element. However these sealed induction kits do tend to be more expensive than the open type induction kit but they should produce more power. The temperature was monitored on the route to determine the trends in the temperature changes, the max temperatures and minimum temperatures.

Ramair Filters utilise the top-quality components in all their kits see below for what this kit will include: Open road driving: average gain + 4.38hpwith heat shields – (intake temps 9C lower with heat shields over standard air box.) Design 3– Cone filter completely enclosed filter with cold air feed tube feeding from under the carHeat can also be an issue inside the car too. Certain competition vehicles may suffer from heat caused by a central exhaust system or from hot engine components being near the bulkhead or firewall. Reflective material can be particularly useful to protect the driver from excessive heat, thus allowing for a greater level of concentration and comfort.

These gains solely take into consideration the hp gains due to lower temps and not the hp gains that the induction filter may also bring. I tried air filter heat shields in 4 different designs to see which was the most effective at reducing inlet temps. We want to know The heat soak from the engine was making the feed incredibly hot and therefore heating the intake charge as it passed through it. Heat shields should surround the cone filter an ALL sides, except the side facing the front of the car so the filter can receive air when the car is moving. Isolate from warm air that has passed through the radiator if necessary.This induction kit will increase the airflow into the turbo while increasing engine noise over the restrictive factory air intake system. This kit includes everything required for the fitting of the induction kit. Urban driving: average gain + 5.84hpwith heat shields – (intake temps 12C lower with heat shields over standard air box). Temp changed more slowly than with no heat shield. Temps lower in general compared to no heat shield. Temperatures generally higher than standard air box. 5.2 Conclusion

Urban driving: hp gain max: + 6.8hpwhen using heat shields – (intake temps 14C lower with heat shields over standard air box).Due to the laws of thermodynamics, anything that uses energy or performs work will inevitably produce a by-product in the form of heat. A car is no exception to this law and features various components which produce heat, some more than others. In most cases however, heat can have a detrimental impact on the performance of certain engine components. The air filter heat shields can increase *power by4.5% (6.8hp)on a150hpengine. Inlet air temperatures dropped by 14C. Heat Shields should be used with an induction kit to ensure the intake charge is not heated by the main engine bay. Most of these articles have temperature in Fahrenheit. (5/9 Celsius = 1 Fahrenheit), or just over half. The best figures from the articles above is from Banks Power which says that for a 5.5C drop power should rise by 1.8%.

The figures used to calculate power gains due to the reduction in intake temperatures are taken from Banks Power, see link. Ducting routed next to the engine should NOT be used as the ducting is heated by the engine/exhaust. Design 4 gave the best results. Isolating filter completely from engine bay but leaving the filter exposed to the air entering the engine bay. No cold air feed was necessary. For every 10C increase in intake air temps, air density is reduced by 3% and therefore horsepower is reduced by 3%. So while an induction kit will make a better noise and make then engine bay look better it may not increase peak horsepower if it is not properly shielded from the heat of the engine bay. Viper Induction Kits/Typhoon Induction Kits and other Cold Air Intakes CAI. To test the temperatures on the road, a route was devised which took in Urban Roads, Open Roads and Motorways.