Is a Bigger Intercooler Better?

The size of the intercooler is important – if it is too big for the turbo the turbo will take a long time to fill the intercooler with air and throttle response will be delayed. Positioning is also important. Front mount intercoolers are the best for efficiency, where they can get a good flow of cooling air right through the front bumper. Top mount intercoolers as on Subaru Impreza WRX’s are not ideal as heat soak from the engine can degrade the intercoolers function. Top mount intercoolers do have one advantage though, because they are located close to the engine and don’t require long connecting pipes that can also degrade throttle response.