Airflow

[Novaz]

I have heard that masking off the grill area can gain a speed increase due to some aero factor obviously cooling could then be a problem I have a one piece tilt front end that has a blank grill area I also do not have a hood section fitted yet due to having a blower it needs cutting to fit
my question is are there any benefits providing you can cool the engine enough with just an electric fan and flow under the car, as a drag car it wont need to run for more than a couple minutes fom stage to pits.
Any thoughts
Thanks