running a series of intercoolers?
03-15-2007, 09:05 PM
#31
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Join Date: Aug 2006
Posts: 59
Re: running a series of intercoolers?
Originally Posted by ghettoturbo
now i could be wrong, but it seems like you pulled that out of your ***. either way, i wasnt saying to have an immensly thick ic that was not very large in frontal area, just that if you take a given ic size and make it thicker, youre increasing its cooling surface area
03-15-2007, 09:16 PM
#32
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Join Date: Aug 2006
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Re: running a series of intercoolers?
Originally Posted by Croky Bell, Maxium Boost, page 58
Choosing the thickness of the intercooler core is a bit of a juggling act similar to the turbulators. The Juggling act is brought about by the fact that the second half of any core does only one-fourth the work.
Adding thickness to the core will indeed improve effiency, but the gains become less and less. Another negative effect is btought into play by increasing the thickness: the increasing difficulty of getting ambient air to pass though the core. Essentially, then, the drag coefficient of the core goes up as thickness increases.
RULE: When viewing intercooler designs, regard thick core layouts as less than well thought out.
Adding thickness to the core will indeed improve effiency, but the gains become less and less. Another negative effect is btought into play by increasing the thickness: the increasing difficulty of getting ambient air to pass though the core. Essentially, then, the drag coefficient of the core goes up as thickness increases.
RULE: When viewing intercooler designs, regard thick core layouts as less than well thought out.
03-15-2007, 09:39 PM
#34
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Re: running a series of intercoolers?
Originally Posted by tealcherokee
So basically, as i was trying to explain, the largest, thinnest intercooler is the most efficent.
Originally Posted by 89shithatch
there was a 300zx in the latest modifidied mag with dual sidemounts.
03-15-2007, 09:47 PM
#35
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Join Date: Apr 2006
Posts: 25
Re: running a series of intercoolers?
I'd have to agree with tealcherokee in regards to larger IC's height and length wise are better than IC's with thicker cores. Here's a quote from corky bell's maximum tuning, "Core Thickness Choosing the thickness of the intercooler core is a bit of a juggling act similar to the turbulators. The juggling act is brought about by the fact that the second half of any core does only one-fourth the work. Adding thickness to the core will indeed improve efficiency, but the gains become less and less. Another negative effect is brought into play by increasing the thickness: the increasing difficulty of getting the ambient air to pass through the core."
03-15-2007, 10:12 PM
#37
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Join Date: Aug 2006
Posts: 59
Re: running a series of intercoolers?
Originally Posted by ghettoturbo
he even says right in the passage you quoted that increasing thickness will increase efficiency, but as you go thicker and thicker the gains in efficiency will not be as great. Basically you need to find a happy medium.
03-15-2007, 10:17 PM
#38
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Re: running a series of intercoolers?
Originally Posted by tealcherokee
thats comparing 2 intercoolers of differnt thicknesses, with the same frontal area.... so a 12x12x2 vs a 12x12x4 double the suraface area, 25% more cooling. double the surface area and leave the thickness the same.. 100% more cooling
03-16-2007, 05:19 PM
#40
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Join Date: Mar 2005
Posts: 723
Re: running a series of intercoolers?
Things that you have to put into consideration:
Internal volume, IE how restrictive is it at a given cross section (vs overall). That restricts flow, obviously, but also a higher velocity inside leads to better heat exchange.
External airflow, which is both the mass moving though it, and how easily it can move through it. To give you a better idea, assume both fmic's are 24" long: a 12"x3" core will have just as much internal volume as a 6"x6" core, but air will want a move MUCH slower through the thick 6x6, because of pressure drop. It essentially slows the air down too much. WIth fmic's its not a big issue, since that large of an air mass being pushed through it at even 30mph wont' slow down much for anything. It will try to go around it though...
As mentioned, use two smaller ones if they can support the flow and you have no reason to go with a big fmic. I saw two stealth cores on ebay, but the owner expected a shitload. I was also thinking of that if I ever wanted to use a car w/o AC and maxamize cooling to the radiator.
Internal volume, IE how restrictive is it at a given cross section (vs overall). That restricts flow, obviously, but also a higher velocity inside leads to better heat exchange.
External airflow, which is both the mass moving though it, and how easily it can move through it. To give you a better idea, assume both fmic's are 24" long: a 12"x3" core will have just as much internal volume as a 6"x6" core, but air will want a move MUCH slower through the thick 6x6, because of pressure drop. It essentially slows the air down too much. WIth fmic's its not a big issue, since that large of an air mass being pushed through it at even 30mph wont' slow down much for anything. It will try to go around it though...
As mentioned, use two smaller ones if they can support the flow and you have no reason to go with a big fmic. I saw two stealth cores on ebay, but the owner expected a shitload. I was also thinking of that if I ever wanted to use a car w/o AC and maxamize cooling to the radiator.
