Intercooler Thread

[pianoman]

Thanks,

Just using you guys for an example. Crag do you have any personal info you could add here?

 

[sp00ln]

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I know im late and I didnt read the entire thread but this picture is retarted IMO. There cannot be any difference between which style - the air is still traveling the same distance in either intercooler. The top one has shorter runners but longer tubes, and the bottem one has longer runners but shorter tubes - so it really doesnt matter - either way, the same volume of space has to be filled in either intercooler, no matter which direction youre going. The only thing that will make a difference in pressure is the actual size of the intercooler.

 

[pianoman]

Vertical cores can pack in the really dense internal fins with big flow distrupting high heat exchanging louvers and still have lower pressure drop. Side-side cores longer than 20" need/should be running wider spaced plain fins with no louvers that are less efficient at heat exchange but lower pressure drop. Comes out to a wash between the 2 efficiency wise with lower pressure drop going to the vertical running cores.

 

[pboglio]

To add to whats already been mentioned, no 2 equal sized cores are the same, because of the internal/external fin densities. This affects both heat transfer and pressure drop.

The problem is the top/down core "usually" uses that size entrance end tank that forces the air to turn a complete sharp 90* turn on both the entrance and exit. This means for example, roughly a full 1/4 of the core flows little to no air, so actually the top/down core acts like a smaller core. If you look in any fluid dynamics text, the inside radii of a sharp 90* miter bend actually has the flow "reversing" direction. This means more hot air thru fewer tubes, taking away the advantage of the short tube top/down core.

Its the end tank design that is causing the problems. Take a top/down core and put a fan or delta shaped end tank on it and watch the efficiency go straight up, it has the potential for higher efficiency than the side/side core because of the tighter fin density. In practice, its hard space wise to fit a top/down core that is equal in size to the side/side cores, let alone fit the ideal shaped intake/exit intercooler end tanks.

 

[doug]

Good article on intercoolers, including a nice section on end tank design:

http://www.are.com.au/techtalk/intecoolersMR.htm

Edit: Oops, just realized this link was also posted on the previous page-- sorry.

 

[pianoman]

Whats a fan or delta shape?

 

[pboglio]

Whats a fan or delta shape?

You know, like a delta wing on a supersonic jet fighter. Like a funnel or reverse funnel, depending on which end of the intercooler its welded to. The point is minimized flow separation. Not so much for pressure drop reduction by itself but to prevent the flow separation from keeping the air from entering the first few tubes in the I.C. core. This type of Intercooler end tank is closer to the IDEAL or THEORETICAL ideal shape. I've first seen it in practice on the APEXI cores, than some DSMer to his credit came up with an almost EXACT copy of it and custom cast a copy of it. I'd buy the APEXI end tanks though, much cheaper.

 

[doug]

I really like the end tanks on this one:

http://dvdtfab.com/2g_intercooler_kit.htm

There's other threads active right now, including one on the DSMLink forums, with haters dismissing his research, but this still seems like a much better design than most of the sheet metal end tanks I've seen.

 

[oldman]

Hey guys, I need some help here. I'm about to purchase a bullseye t04b h3 and I'm looking for specs on my Buschur street core. I know it's a Spearco core but don't know which. Buschur doesn't list anything on their website and when I call them, the person I spoke to either didn't know or didn't want to tell me. He told me the measurement is 24x8.5x3.5 but he wasn't sure. I basically needs to make sure the fmic will handle the h3 flow before I purchase the turbo. Links would great. Thanks.

 

[telly699]

I know im late and I didnt read the entire thread but this picture is retarted IMO. There cannot be any difference between which style - the air is still traveling the same distance in either intercooler. The top one has shorter runners but longer tubes, and the bottem one has longer runners but shorter tubes - so it really doesnt matter - either way, the same volume of space has to be filled in either intercooler, no matter which direction youre going. The only thing that will make a difference in pressure is the actual size of the intercooler.

Hey man, dont go bashing my sweet visual aid!

Most of my reasoning is derived from Corky Bells book well circulated book. Wheres yours from? I read it and it didnt make a lot of sense if he was indeed, correct. Trust me, I am as confused as everyone else, but I am pretty sure Bell has an idea what hes talking about and read what he has to say about this.

I am by no means a air dynamics specialist, but what your saying about end tanks doesnt make much sense as far as pressure drop goes. (which is why I made that retarded picture) BECAUSE, you do not lose ANY pressure while the air is running through the endtanks. Obviously, the pressure drop comes from when the air is making its way across the fin section and to the other end tank. So if the end tanks were baffled and 12 feet long, but the core section was only an inch then the pressure drop would be tiny. Even thought its a six foot intercooler... am I crazy or whats the deal?

 

[sweet97]

Hey guys, I need some help here. I'm about to purchase a bullseye t04b h3 and I'm looking for specs on my Buschur street core. I know it's a Spearco core but don't know which. Buschur doesn't list anything on their website and when I call them, the person I spoke to either didn't know or didn't want to tell me. He told me the measurement is 24x8.5x3.5 but he wasn't sure. I basically needs to make sure the fmic will handle the h3 flow before I purchase the turbo. Links would great. Thanks.

I believe you have a 2-120, flows 740CFM @ 1.5 PSI pressure drop and can support 520HP. Go to www.turboneticsinc.com and find the spearco air-to-air IC cores. The 6th one down is likely the one you have, quite a popular core. Mark

 

[oldman]

I believe you have a 2-120, flows 740CFM @ 1.5 PSI pressure drop and can support 520HP. Go to www.turboneticsinc.com and find the spearco air-to-air IC cores. The 6th one down is likely the one you have, quite a popular core. Mark

Thanks for the link.

3.5"Dx7.9"Wx24"H is what's listed for 2-120, did they reverse the width and height? The guy at Buschur said he would estimate it to be about 650cfm but the H3 flows over 750cfm. Please help me get to the bottom of this, I've ordered the H3 already but can still change it to the v-trim if need be.

 

[sweet97]

I believe the have the height and width changed on several core there. I would ask them about the IC(bullseye). Also might depend where you live for tempertures the IC will have to work in. I have the spearce 2-221 which is only 18.5"wx6"tallx3.5" thick. I amsupplementing it with a true ColdAirIntake, pics available if you send your emailaddy. I have a short route IC to TB pipe that will be covered with header wrap. Spearco makes one of, if not, the best IC's available. Your welcome for the link. Mark