Why use an intercooler, if the intercooler itself creates a restriction?
Remember your ideal gas rule (PV = nRT). As pressure rises so will density, all else being equal. However, as pressure rises so does the temperature. Hence intercooling becomes critical. Using (for example) an air-air intercooler isn’t free. An intercooler core does present a pressure drop (aka restriction) in the air charge. So remember when intercooling, the restriction you impose must be less than the positive effect of cooling air. Choose your intercooler core wisely.
