Turbo Charged Dart Question

Yes that amount of airflow will be fine. You are overthinking this. Consider the amount of time you are adding heat in to an intercooler. With a turbo, on a street car, you are only hard the on throttle on boost for seconds at a time. At the very most 20 seconds or so. Duty cycle is low. Drag race is similar. Road or open course racing is a different animal, duty cycle there is much, much higher and other things need to be considered. For a low duty cycle situation the off boost time is high and the intercooler is not doing much and most good aftermarket air to air intercoolers flow lots of air through them. Focus your attention on building an oversized and well thought out cooling system and stick the intercooler right in front of it.