Intercooler Inlet Area
12-12-2004, 02:19 PM
#1
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in this book im reading it states.
and here is a pic that goes with the first part of it.
[attachment=25870:attachment]
and heres for the second part.
[attachment=25871:attachment]
Some make a very basic mistake thinking the duct opening muyst be the same area or larger than the frontal area of the cooler or water radiator. Actually the reverse is true; a duct opening considerably smaller works better as it prevents air, flowing in towards the cooler, from simply turning around and spilling out around the edges at the duct opening. To prevent this, reduce the duct opening to 30-60% of the intercooler area. Note, when the intercooler is smaller than the radiator dont just leave the cooler standing free in the duct as air will still want to detour around it. Rather, divide the duct to splite a portion of air flow into the cooler, then seal this divider to the chrge cooler, thereby forcing all air in that corrider through the charge cooler.
and here is a pic that goes with the first part of it.
[attachment=25870:attachment]
and heres for the second part.
[attachment=25871:attachment]
12-15-2004, 09:48 PM
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ya know im not sure exactley how true this is. but could someone attach a string or something from behind the IC, and try out the two different methods of letting air through it (both with a larger and smaller intake area) and make sure that the only air that touches the string is the air that passes through the IC.
12-18-2004, 10:48 PM
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oh yeah, the lines that are coming from the front of the rad in both pics is a type of rubber. have it so that it attaches to the rad and the inlet of your bumper so that all the air that goes in the bumper has to pass through the ic/rad to get out.
12-18-2004, 11:04 PM
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who is the author of this book?
I don't agree with all of what's been stated...
a smaller air opening that widens out toward the IC is gonna lower the velocity of the airflow.
a larger opening that narrows toward the IC is gonna increase the velocity of the airflow..
true... all the air that is forced into the nose might not go thru the IC... but rather "spill" back out of the duct. As long as it isn't creating vorticies in there enough to disrupt the airflow you are still gonna get a large volume of air thru the IC and at a high velocity than the small opening idea. AS LONG as you have proper ducting to keep the air from escaping around the IC without changing direction.
I don't agree with all of what's been stated...
a smaller air opening that widens out toward the IC is gonna lower the velocity of the airflow.
a larger opening that narrows toward the IC is gonna increase the velocity of the airflow..
true... all the air that is forced into the nose might not go thru the IC... but rather "spill" back out of the duct. As long as it isn't creating vorticies in there enough to disrupt the airflow you are still gonna get a large volume of air thru the IC and at a high velocity than the small opening idea. AS LONG as you have proper ducting to keep the air from escaping around the IC without changing direction.
12-18-2004, 11:16 PM
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I read that in corky bells book and that doesnt make sence to me. I mean I can understand about the spilling over of air thing but a greater volume of air will be going through the IC if it is all exposed instead of cut off like that.
12-19-2004, 03:12 AM
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It's highly dependent on the density of the ambient charge IC core fins.
You can't expect 100% IC frontal area "duct" is going to pass through the IC core with no problems?
I think the rule of thumb is 25% duct cross section versus IC core ambient charge area...
-Ted
You can't expect 100% IC frontal area "duct" is going to pass through the IC core with no problems?
I think the rule of thumb is 25% duct cross section versus IC core ambient charge area...
-Ted
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