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What cfm should I look for in an intercooler. Would be a 3L.
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probably one that would meet or exceed the cfm of the turbo/supercharger.
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just an fyi. the upgraded spearco intercooler that comes with the ADC T3/T4 kit is a 700 cfm.
Jim Hahn
1996 T-Red Contour SE Reborn 4/6/04
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I believe the intercooler that Rick(Buckshot) is fabbing up is 700cfm also, IIRC.
Mark
2000 Black CSVT
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Thx guys, im looking at some around 8-900ish area
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The one that I started using in 2003 was a 700CFM two pass core. Works great.
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700cfm is plenty for ANY FI project.
Just do the math and you'll quickly figure out why.
2000 SVT #674
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It was not broke; Yet I fixed it anyway.
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Stilov and I are using 750 cfm spearco intercoolers
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone 
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That is a lot of CFM, the turbo I was looking at upgrading the STi too is just shy of 500cfm, the subie folks go nuts upgrading to frount mounts but I think its overkill when looking at cfm. Anybody know a good calc to size a intercooler?
Edit: found a good explanation of how to calculate the size, its somewhat generic but should work well if you can get some of the data on the core like the example shows from Spearco.
http://www.turbosaturns.net/articles/intercooler_sizing.html
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That seems like it is a good estimate. I would think temperature would play a huge factor in those figures.
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Originally posted by kinger:
That is a lot of CFM, the turbo I was looking at upgrading the STi too is just shy of 500cfm, the subie folks go nuts upgrading to frount mounts but I think its overkill when looking at cfm. Anybody know a good calc to size a intercooler?
Edit: found a good explanation of how to calculate the size, its somewhat generic but should work well if you can get some of the data on the core like the example shows from Spearco.
http://www.turbosaturns.net/articles/intercooler_sizing.html
Yeah.. WRX people almost always go way too big on IC's. If the top mount wasn't in such a crappy position (on top of a hot engine bay) it would be probably of a all right size. I plan on going front mount.. but I have some things in mind different from the norm.
04 Subaru WRX "Eurosport bling bling fast and furious tokyo drift"
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well I plan on selling my suby...(that's a different story though)
Yes Swazo and I are using a 750cfm...but that is just the core, once you add endtanks etc...I am sure it is shy of that.
98 E0 SVT with some stuff
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Will you loose boost presure if you go WAY to big? Or is overkill just overkill, no big deal? I understand alot of piping for an intercooler hurts boost. but would a intercooler with way more cfm's than needed hurt power? Or is this a realy stupid question 
98 csvt t-red.. sho-shop intake, b&m, fidanza, spec1 clutch, Torsen, DMD,optimized Y& TB, Brullen, rear strut bar,h&r's,17" konig traffik's.
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So to speak. A larger intercooler will have a higher pressure drop across it. (the fin design being equal of course)
Any drop makes the compressor work harder for the same cfm flow after the intercooler respectively. That equates to more heat. The good thing is most quality aftermarket intercoolers are pretty efficient to begin with.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
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