Helix intercooler for BMW N54B30

An intercooler is just another name for a heat exchanger that is used to cool air that has been compressed by either a supercharger or a turbocharger. ITis placed somewhere in the path of air that flows from the turbo or supercharger to the engine. An intercooler is needed because of the physics of air described in the Ideal Gas Law, that is PV=nRT. When the intercooler sits in front of the car, to benefit from wind from driving the car to vent the absorbed heat, we call it an FMIC: front mounted intercooler.

Explaining the ideal gas law as basic as we can, we can say that because pressure and temperature are directly proportional, as you create more pressure with your turbo or supercharger, you produce more heat as well. Hot air is less dense and therefore contains less molecules of oxygen per unit volume. This means less air for the motor in a given stroke and therefore less power produced. Hot air also causes a higher cylinder temperature and therefore can aid in pre-detonation of the combustion cycle causing detonation.
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Jeroen
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Helix intercooler for BMW N54B30

Post by Jeroen » 01 Jul 2013, 16:14

The intercooler somes with silicone piping to replace the flimsy OEM elbows. these need to be cut off (there is an iron clamp that needs to be but with a power tool or saw). The intercooler didn't line up on the passenger side screw hole. It took as a lot of wedging and stretching to get it lined up. The intercooler is held up by two screws and two plastic clips. The clips helped to guide the intercooler to match up the holes, contrary to what their instruction manual suggests. It took us well over 3 hours to install it, with another hour or so to remove the old one.

I'll put the car on the dyno soon to see if we made any power improvements (in combination with the CAI's).


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