Steve Hill Motorsport : Engine Cooling : Accessories

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High Pressure Radiator Cap

Fortified main pressure valve spring and silicon packing are used to raise the pressure inside the radiator for a higher boiling point.

The coolant will not boil easily, preventing air bubbles in the block and radiator core with improved heat transfer.

CUSCO's high pressure radiator cap works at 1.3kg/cm² at zero atmospheric pressure. In practise though, the atmospheric pressure of the road surface (approximately 1.0kg/cm²) is added and the pressure is 2.3kg/cm².

Radiator Internal Pressure and Boiling Point

PRESSURE	BOILING POINT
2.3kg/cm²	126.5°C
2.0kg/cm²	112.6°C
1.9kg/cm²	120.3°C
1.0kg/cm²	100.0°C

1.0kg/cm² (atmospheric pressure) + 1.3kg/cm² (pressure valve) = 2.3kg/cm²

*The atmospheric pressure can vary under road conditions

Type A

Type B

Radiator Cooling Plate

Decreases incoming air temperature.
Better combustion efficiency increases air going through the radiator for more output, thus holding down coolant temperature on track runs and continous high speed drives, preventing over-heating. MATERIAL Light weight aluminium

Water Spray Controller

Decreases temperature for in-going air to the intercooler, enabling better combustion and increasing air intake amount for more power.

USE
It can be set to spray continuously for a span from one to five seconds in one second intervals. Also the spray interval can be set at 3, 4, 5, 7 or 9 seconds. Other settings include continuous spray for a period of 15 seconds to 3 minutes maximum and ability to turn on at a pre-set rpm level. Of course the settings stop automatically when the tank is empty.

ADDITIONAL FEATURE
With the optional Nose and Hose Set fitted, the radiator will can be water sprayed as well.

Subaru Impreza Intercooler Heat Shield

Shields the heat for the intercooler

Subaru Impreza Reinforced Radiator Hose

Prevents overheat on continuous high speed driving

This hose is strong enough not to crush in high-rev, high speed runs with the thermostat removed.

Street Radiator

	Improves cooling efficiency by 40% Optimised with the use of a Spoon Thermostat switch and a Spoon Thermostat Uses standard rad stays
The Spoon radiator core rises from 10mm to 25mm thickness. Whilst using the shape of the normal radiator and maintaining the quality of the standard part, cooling efficiency improves 40%. As for the Radiator Cap, F type suits, and the standard stay can be used. We recommend you combine the use of a Spoon Thermostat switch and a Spoon Thermostat.
Available for CIVIC EG6, EK4 CIVIC FERIO EG9, EK4 CIVIC TYPE-R EP3, EK9 INTEGRA DC2, DB8 INTEGRA TYPE-R DC5, DC2, DB8 S2000 AP1

Radiator Hose

	Maintains water flow rates in tuned engines Preformed for ease of fitting Heat and solvent resistant
When a tuned engine is used hard, the engine rotation causes the water pump revs to go up and down violently, causing a normal radiator hose to collapse under the suction variations of the water pump. Since there is a large amount of water moved (especially when a large-sized radiator is fitted) the tendancy of the hoses to collapse worsens. Moreover, the phenomenon "to shut" is a problem in high air pressure such as when the car is running at high speed at low altitude. Once "shut" the hose will not return quickly to shape and volume, and the engine will then overheat immediately. The Spoon hose are deformation-resistant hoses to also look good! Made with SEP material (Silicon ethylene propylene rubber), whilst many other performance hoses use EP material (Ethylene propylene). The advantages of Spoon SEP hoses are that they have better heat resistance, proof against the cold, are long term season-proof, and have high temperature vacuum stability. For example: heat resistance EP material -- 120°C SEP material -- 160°C.
Available for CIVIC EK4, EG6 CIVIC TYPE-R EP3, EK9 INTEGRA TYPE-R DC5, DC2, DB8 S2000 AP1

Radiator Cap

	Reduces coolant boiling Essential for tuned engines 2 types to fit all Hondas
The radiator cap functions to increase the pressure inside the radiator; the laws of physics then apply, accordingly, even when the temperature of the coolant water exceeds 100°C, boiling can be avoided so gas bubbles and subsequent hot spots are avoided and increased cooling performance may be achieved.
Both caps available for all models

Thermoswitch

	Switches fan on at 80 degrees Essential for all tuned engines Compliments Spoon engine cooling components
When the temperature of the coolant water reaches 98°C, the thermo switch initiates cooling by turning on the radiator's electric fan. This action reduces the temperature to 80°C, thus improving the radiator's cooling efficiency.
Available for all models

Thermostat

	When the temperature of the coolant water reaches 98°C, the thermo switch initiates cooling by turning on the radiator's electric fan. This action reduces the temperature to 80°C, thus improving the radiator's cooling efficiency.
Available for all models