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Greyhound - 930's Avatar
 
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Thoughts on this intercooler?

Has anybody seen this done before? Would it be a good upgrade or would it be better to wait and go for a full bay i-cooler.
P.S. I have all A/C components removed from my engine bay.
The ad reads "doubled up factoy sized intercooler to suit any 911 turbo charged vehicles
in good condition"



Old 06-24-2009, 12:13 AM
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This looks like two stock IC are welded together, don't think that's a good idea regarding flow.

Furthermore you have to check, if there is enough free space under the grill for double height, I believe it's not
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Old 06-24-2009, 03:20 AM
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If it isnt I have a tail that definately will fit it.
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Old 06-24-2009, 03:22 AM
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Back in the day 80's, I've seen Porsche hp-freaks guys do this. A cheap alternative..
Old 06-24-2009, 04:17 AM
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How weird! Two stock intercoolers welded together...I highly doubt it will fit under a stock tail.

Not what I would spend my $$ on.

Yasin
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Old 06-24-2009, 04:55 AM
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I've seen these before. As someone stated, it is two stock ICs welded together.

It should fit under the lid as it's no thicker than an andial/Garretson. I too would be worried about the flow.. rather than one thick core, it's two cores together.

All said, think I'd pass!
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Old 06-24-2009, 05:31 AM
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Quote:
Originally Posted by onboost View Post
I've seen these before. As someone stated, it is two stock ICs welded together.

It should fit under the lid as it's no thicker than an andial/Garretson. I too would be worried about the flow.. rather than one thick core, it's two cores together.

All said, think I'd pass!

Eggzachry - I'd not worry (much) about the fit. I measured my bud's Kokeln last week, it's exactly double OE @ 5" compared to OE @ 2.5" thickness (IIRC).

I WOULD worry about flow tho! Hafta test one to render anything beyond a SWAG, but short of that I'd pass personally...
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Old 06-24-2009, 06:09 AM
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WOW - it sounds like it has been done in the past, but it's hard to imagine how one could weld that up free of air leaks . . .

Ron
Old 06-24-2009, 07:30 AM
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Thanks for all the responses guys. I thought it would probably fit as it has no rubber lip but flow was also my main concern. Think I'll pass for now too.
Old 06-24-2009, 11:01 PM
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At the risk of running counter to the greater community this cooler has benefits. There was a time when CAC cores were not available to aftermarket vendors and engine builders were still innovative.

First, I’m not sure which FLOW comments are relating to. Compressor discharge flow is improved as there is twice the core area for given flow and pressure loss is reduced and heat discharge improved. This accomplishes much of what you pay for with your $2000 aftermarket cooler.

If you are talking about cooling air flow then the conditions are no worse than all deep core units. This factory cooler is not the most efficient type of core construction however it’s not bad. Given one can shop eBay and buy two of these for $100 then pay a fabricator $200, or do it youself for nothing the value is very high.

Yes, you probably will not wow your buddies if a $2000 CAC is the expected price of admission to your club.

Last edited by copbait73; 06-25-2009 at 09:02 AM..
Old 06-25-2009, 06:20 AM
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Unbelievable how things done often a few years ago transition into untried theories on the new folks. This has been done plenty of times back in the day. Sure, one could buy a better flowing intercooler, but this does work pretty good. While doubling it up will not give you twice the effectiveness, it will be more effective than stock. And for very little money since you can buy them all day long for less than 100. It was a proven method, and does fit under the intercooler well after some trimming of the shroud which is required for any aftermarket intercooler anyway. The main weakness with this method isn't so much 2 cores versus one thick core. The weaknesses are mostly due to the extremely durable stock core. That almost invulnerability to getting bent and kinked when compared to the usual aftermarket intercoolers, which have very thin walled cores, is also somewhat detrimental to cooling the hot air. In fact, on those original intercoolers, even the little fins are so thick that that they are tough to kink up. Notice how fairly new aftermarket intercoolers have their fins looking gnarly while an ancient stock interooler thrown in some junkyard jooks perfect. Later cores, stock and aftermarket, are thinner cored for effectiveness. Those old intercoolers were so thick walled that I personally know of circle track racers who used them as oil cooler cores because or their resistance to debris.

Now, the one shown above, seems sloppy. It will fit, of course. But it's sloppy. Below is a job done right with the flanges cut off. Looks almost factory. This is the proper way to weld it.







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Last edited by Ed Bighi; 06-26-2009 at 04:20 PM..
Old 06-26-2009, 04:13 PM
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Quote:
Originally Posted by Ed Bighi View Post
Unbelievable how things done often a few years ago transition into untried theories on the new folks. This has been done plenty of times back in the day. Sure, one could buy a better flowing intercooler, but this does work pretty good. While doubling it up will not give you twice the effectiveness, it will be more effective than stock. And for very little money since you can buy them all day long for less than 100. It was a proven method, and does fit under the intercooler well after some trimming of the shroud which is required for any aftermarket intercooler anyway. The main weakness with this method isn't so much 2 cores versus one thick core. The weaknesses are mostly due to the extremely durable stock core. That almost invulnerability to getting bent and kinked when compared to the usual aftermarket intercoolers, which have very thin walled cores, is also somewhat detrimental to cooling the hot air. In fact, on those original intercoolers, even the little fins are so thick that that they are tough to kink up. Notice how fairly new aftermarket intercoolers have their fins looking gnarly while an ancient stock interooler thrown in some junkyard jooks perfect. Later cores, stock and aftermarket, are thinner cored for effectiveness. Those old intercoolers were so thick walled that I personally know of circle track racers who used them as oil cooler cores because or their resistance to debris.

Now, the one shown above, seems sloppy. It will fit, of course. But it's sloppy. Below is a job done right with the flanges cut off. Looks almost factory. This is the proper way to weld it.







Ah, a voice of sanity. There is a right way and a wrong way to do everything, and at least whoever did these two did them right.

With this you get a bullet proof although heavy IC with agreeably less heat transfer characteristics than modern aftermarket units, but for the price it should give better cooling vs. stock just from a surface area perspective alone.
So if on a shoestring budget and you know someone with excellent welding skills, go for it until funds allow for something better. There is nothing wrong with innovation, which is what ultimately leads to proven and accepted improvements.
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Old 06-26-2009, 06:33 PM
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why on earth would anyone think that wouldn't work better than a stock cooler? It's funny how old methods suddenly stop working when new stuff comes along. I'm much more impressed with ingenuity than i am with spending money. The best part is I was just brainstorming over this idea as I looked on ebay at all the stock coolers for sale cheap. Then I come on the board and this post is staring me in the face... gotta love the web, it's not just for spiders anymore.
Old 08-25-2009, 03:02 PM
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I'm getting two welded together this week. I'll post the pics when it's done.
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Old 08-25-2009, 06:15 PM
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surface area is surface area. there has to be an improvmet .

isnt bigger better?
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Old 08-26-2009, 12:49 AM
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isnt bigger better?
when it comes to boobs and bank accounts yes
Old 08-26-2009, 06:17 AM
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I think it will undoubtably work better! But i thought the main goal for an intercooler was to maximize the surface area and keep the core thickness down to a minimum, surely the thicker you go you will get hotter areas in the middle? I would look at what Secan do, being the leading intercooler manufacturers on the planet, and try and replicate it. I'm not qualified to even give an opinion but logic would say large and thin would do the job better than small and fat (and no we aren't talking about sex )

A couple of intercooler porn shots of Secans





And it's what Protomotive try and do with theirs



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Old 08-26-2009, 07:44 AM
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Ed,

If I remember correctly that slant runs some decent boost numbers north of 1.0 bar and has been that way for years in the AZ heat without issues. I don't think that a Kokeln or B&B are any better than this and they work well. Sure, there is not as much surface area as full bay units but they seem to work for a lot of people. I would rather do this than spend $1500 on a Kokeln that has roughly the same dimensions.
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Old 08-26-2009, 09:38 AM
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Yeah, Dale's car has been running one bar as a daily driver in Phoenix for years on that thing. Sure there's better. Heck, I'm sure I can get a three thousand dollar intercooler that really delivers. The best part here is that it's bolt on. Not like, bolt on after some coaxing not mentioned in the literature. No fitment issue since you use the same bottom that came out of the same car.
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Old 08-26-2009, 02:59 PM
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i'm on ebay right now looking for a stock cooler
Old 08-27-2009, 06:15 AM
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