Somewhat.
The non-ac heaterbox is only X inches deep, lets say 6. If you use an 8" fan, no matter how you fit it into the box, those 2" of fan blade are not helping much, because the blades aren't in the passage that the air comes from.
I'm bad at describing stuff like this, but looking at the box from the front of the truck...the air is pulled in from the passenger side of the box by/through the fan, then forced out the drivers side of the box into the cab. The stock fan for a non-AC setup takes up the "depth" of the heater box, in other words, all space that air can move through.
With the spacer, the edges of the fan are just "pushing" air against the spacer. The front portion of the fan obviously is still moving air like it's supposed to be, but the back portion can't move the air anywhere, because it's not open.
I guess another way to look at it is if you took the spacer out, and ran the fan as is, would the fan sticking into the engine compartment contribute to airflow in the cab?
The non-ac heaterbox is only X inches deep, lets say 6. If you use an 8" fan, no matter how you fit it into the box, those 2" of fan blade are not helping much, because the blades aren't in the passage that the air comes from.
I'm bad at describing stuff like this, but looking at the box from the front of the truck...the air is pulled in from the passenger side of the box by/through the fan, then forced out the drivers side of the box into the cab. The stock fan for a non-AC setup takes up the "depth" of the heater box, in other words, all space that air can move through.
With the spacer, the edges of the fan are just "pushing" air against the spacer. The front portion of the fan obviously is still moving air like it's supposed to be, but the back portion can't move the air anywhere, because it's not open.
I guess another way to look at it is if you took the spacer out, and ran the fan as is, would the fan sticking into the engine compartment contribute to airflow in the cab?
