car, without the use of an intercooler the inlet manifold would get hot. Granted, not all
cars have intercoolers, but as a result they can't compress the air too much or it will get too hot, resulting in pre-ignition, but in theory if you removed the intercooler from a
car that is meant to have one fitted, it would get hot, very hot indeed. This is because when you compress air you generate heat. Basic rule as to why a diesel runs without spark plugs.
The intercooler is meant to cool the air, nothing to do with colder air contains more oxygen ( the colder more ogygenated air needs to be intorduced before it's compressed, hence the reason for a decent induction system