Snow Performance
Boost Cooler Waterinjection
Functionality & Knowledge
By using the Boost Cooler, you can expect up to approx. 10-20% more power on charged gasolines engines, 15-25% on Turbodiesels and up to 5-15% on naturally aspirated gasoline engines. - Even on pre-tuned cars.
Finally, when the remaining water droplets and water vapour reach the combustion chamber, steam is produced. When the water changes from the liquid to gas state, large amount of heat energy is consumed in sustaining the process. The latent heat of evaporation is 2256kJ/kg, approx. six times more than gasoline.
This chemical process acts as an anti-detonant and also keeps the interior of the engine very clean, so preventing the build-up of carbon “hot spots”. So water is the perfect liquid for regulating excess heat under certain engine-operating conditions and you´ll cool down your EGT, the valves, pistons and turbocharger!
The Boost Cooler injection works in three ways: Firstly, when water is injected into the intake system prior to the cylinder head, the small droplets absorb heat from the intake air.
When we apply heat energy to it, its molecules begin to expand: a great deal of heat is absorbed during this process owing to water’s specific heat capacity - approximately 4.2kJ/(kg.K). Next, the small droplets of water start to evaporate. And so the intake air charge is cooled still further (up to 60°C and more).
Boost Cooler History
Water injection was evaluated scientifically in the 1930’s by H. Ricardo who demonstrated that one can basically double the power output of an engine using water/methanol. The first widespread use was during WWII on supercharged and turbocharged aircraft. In 1942, the German Luftwaffe increased the horsepower of the Focke-Wulf 190D-9 fighter aircraft from 1776HP to 2240HP using 50/50% water/methanol injection.
The allies soon followed by fitting the P51 Mustang and other high performance aircraft with water/methanol injection. Following the war, the turboprop aircraft industry used water/methanol injection and called it the “automatic power reserve system (APR)” for use in hot or high altitude take off. It surfaced again in the 60’s when GM used a system on the OEM turbo Corvair.
