Nar where would the fun in that be? We need a different forum for FMIC vs SMIC U/D pulley good or bad? How much should a workshop charge per hour? Probably missed some though...
Power Actually it is the other way around. Heat is energy, the more heat is being extracted through your radiator, the cooler your engine will run and the more fuel you need to burn to produce the same power. The heat causes the combustion gasses to expand, so the more heat lost to the cylinders and heads the less pressure within the cylinder and the less power the engine will produce. This is how engines have improved fuel economy so much in the last 100 years, reduce the heat lost... There are experimental engines made entirely from exotic ceramics that do not need any cooling, much improved efficiency. This is also why ceramic coating is used on the bores of some high performance and race engines. Andrew
Surface finsh Well amybe. There are 2 opposing forces at work here... emissivity is highest for a back body, so will improve your heat transfer. The rate of heat transfer by radiation is proportional to the differance in the temperature of the hot body and its environment to the power of 4. At low temperature differences the heat transfer rate is small. And it is proportional to the surface area of the body exposed to the environment (the fins of an intercooler are facing each other and would not count as radiation surface area) So without having done any calculations I am confident to say that the dominant heat transfer mechanism will be convection from the flow of cool air over the hot surface. painting the fins will ad the the distance that the heat has to travel (throug the aluminium and then the paint, before being exposed to the air. The added distance and reistance of the paint will reduce the heat transfer rate from the cooler. A black anadized surface is much thinner and would probly be a minute improvement in cooler performance. The calculations for heat exchangers are complex and non exact, being derived from experimental results not first principle science. If you want to know for sure you would be best of testing... but the resaults will vary at different air speeds and temperatures etc. You will have ot be very consistent with methodology to get any meaningful results.
this will add fuel for thought... at todays perth dyno day,ambient temp about 25 odd degrees c, the leading few cars made the following power with the following intercoolers eddie 262.6 rwkw larger side mounts,silver i believe in colour clara 224.4 rwkw large genuine trust frount mount intercooler read mega pricey,silver in colour blue32zx 253.0 rwkw group buy front mount,silver so theres a few examples to consider.....all different cars,good power with different combos on stock turbos....
