BEGi Air Scooper - does it impact IC airflow?
#1
Junior Member
Thread Starter
iTrader: (7)
Join Date: Feb 2007
Location: Overland Park, KS
Posts: 394
Total Cats: 6
BEGi Air Scooper - does it impact IC airflow?
The BEGi Air Scooper increases airflow through the radiator by providing a direct air path around a restrictive intercooler (and, I believe, the AC condenser as well).
I can see how this would be beneficial when the car is out of boost (i.e. at idle & steady state cruise), but under acceleration injecting air behind the intercooler would decrease the pressure differential across it, thus reducing the airflow across the intercooler core and its ability to dissipate heat from the intake charge.
By my reasoning it is similar to the other counter productive mods like turn signal intakes or hood risers. However I have never heard any one complaining about higher intake temps with the scooper.
Can somebody explain why the the BEGi air scooper is any different?
I can see how this would be beneficial when the car is out of boost (i.e. at idle & steady state cruise), but under acceleration injecting air behind the intercooler would decrease the pressure differential across it, thus reducing the airflow across the intercooler core and its ability to dissipate heat from the intake charge.
By my reasoning it is similar to the other counter productive mods like turn signal intakes or hood risers. However I have never heard any one complaining about higher intake temps with the scooper.
Can somebody explain why the the BEGi air scooper is any different?
#2
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,688
Total Cats: 4,113
the area behind the rad will still be low pressure, the extra flow from the scooper might actually improve the flow through the mouth....if the scooper dumped air directly behind the rad, it might be another story.
#6
I've not done any with/without tests like a dutiful inguneer, but with scooper, the #3 IC, with a core 18 x 3 x 9 gave us 92% effectiveness average on a dozen tries.
Consider that a core of 1.1 sq feet, pushed thru the air at 60 mph will see a potential of 5,950 cfm, or about 425 pounds of air per minute trying to get thru the IC. Compared to the mass flow inside the IC at 300 hp (about 450 cfm, or about 32 pounds of air), the IC has an enormous air/charge advantage to work with.
I've yet to figure out how much air actually makes its way thru the IC. Anyone have any hints?
Consider that a core of 1.1 sq feet, pushed thru the air at 60 mph will see a potential of 5,950 cfm, or about 425 pounds of air per minute trying to get thru the IC. Compared to the mass flow inside the IC at 300 hp (about 450 cfm, or about 32 pounds of air), the IC has an enormous air/charge advantage to work with.
I've yet to figure out how much air actually makes its way thru the IC. Anyone have any hints?
#7
I've not done any with/without tests like a dutiful inguneer, but with scooper, the #3 IC, with a core 18 x 3 x 9 gave us 92% effectiveness average on a dozen tries.
Consider that a core of 1.1 sq feet, pushed thru the air at 60 mph will see a potential of 5,950 cfm, or about 425 pounds of air per minute trying to get thru the IC. Compared to the mass flow inside the IC at 300 hp (about 450 cfm, or about 32 pounds of air), the IC has an enormous air/charge advantage to work with.
I've yet to figure out how much air actually makes its way thru the IC. Anyone have any hints?
Consider that a core of 1.1 sq feet, pushed thru the air at 60 mph will see a potential of 5,950 cfm, or about 425 pounds of air per minute trying to get thru the IC. Compared to the mass flow inside the IC at 300 hp (about 450 cfm, or about 32 pounds of air), the IC has an enormous air/charge advantage to work with.
I've yet to figure out how much air actually makes its way thru the IC. Anyone have any hints?
Mark
#8
Junior Member
Thread Starter
iTrader: (7)
Join Date: Feb 2007
Location: Overland Park, KS
Posts: 394
Total Cats: 6
The IC both A) discharges heat and B) is a restriction to airflow. The scooper provides the path of least resistance for ambient air being drawn in by the rad fan.
#9
Junior Member
Thread Starter
iTrader: (7)
Join Date: Feb 2007
Location: Overland Park, KS
Posts: 394
Total Cats: 6
The IC core is no different, yet the scooper is stuffing extra air behind it, reducing its cooling potential, but without signifigantly impacting its efficiency.
But I think I understand now:
Following your suggestion that the scooper improves airflow characteristics within the mouth...
One could hypothesize the high velocity discharge of the scooper with its flow perpendicular to the IC core creates a low pressure region directly behind the IC, and perhaps creates a high pressure region in the air gap above the IC, directing more of the incoming air from the mouth across the IC core while at the same time making more air available to the radiator core.
-OR-
As Corky's musing suggested...
The IC already has a surplus of ambient air flow. Sacrificing a some of that surplus to improve radiator cooling will not prevent the IC from getting the job done.
#10
can hijack this thread to ask if removing the plastic guards on the hood behind the headlights, helps to improve the airflow in the engine bay and lower the temps a bit? obviously in the summer it's ok, but in the winter would be a very bad idea to have water drops over a high temperature turbo, but just for the summer, would this make any sense?
Thread
Thread Starter
Forum
Replies
Last Post
bigmackloud
Miata parts for sale/trade
19
01-08-2021 11:24 AM
StratoBlue1109
Miata parts for sale/trade
21
09-30-2018 01:09 PM