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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 07-04-2006, 02:28 PM   #1
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Default intercoolers / size

My brother and I are looking at intercooler upgrades. Our current setup is custom turbo system, which includes a Greddy TD04 15G turbocharger along with a modified RX-7 TII intercooler. We are pushing 10 psi of boost. I already have in my possession an intercooler rated to flow 400hp; a spearco bar and plate core, measuring 3" x 8" x 26.5" (end-tank to end-tank) with 2.5" inlets. I was wondering what your opinion of this intercooler was in our application, in particularly whether it is too large. this is for a '95 miata. Thanks for any advice!









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Old 07-04-2006, 03:02 PM   #2
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I think it would look f-ing great in there. Although, people don't usually run a 3" core. I haven't seen any. Not that I've been looking.

Is the turbo still efficient at 10 pounds?
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Old 07-04-2006, 03:10 PM   #3
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Okay, found one. Quote from the thread..

"My intercooler was 27X10X3 and fit with no cutting. If I did it again I would have only gone 7"tall. 10" really makes the radiator fight for some fresh air."


The standard I/C fit question: Are you keeping your A/C?
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Old 07-04-2006, 03:25 PM   #4
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losing AC. not sure about turbo efficiency at 10. aside from making it fit is the core a good fit in the project or would a smaller one actually perform better?
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Old 07-04-2006, 03:57 PM   #5
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Sickmint, are you the guy from chicago running the hydra?
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Old 07-04-2006, 05:20 PM   #6
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Sickmint and I both own the car. Yeah the car is running a hydra.
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Old 07-04-2006, 05:24 PM   #7
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Sickmint is concerned about the core being too large for performance reasons...i'm more concerned with actually fitting it on the car...and with restricting airflow to the radiator (koyo 55mm is on its way).
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Old 07-04-2006, 05:41 PM   #8
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You might want to check into the "scooper" from BEGI.

http://www.bellengineering.net/Pages...ata_parts.html

I have one on my car, but haven't had it long enough to tell you if it's good or bad.

By the way, that is a damn long intercooler, but it should fit fine. My intercooler is 3-inch thick too, so depth is not an issue. I don't have a 55mm Koyo, so I can't say how that is going to crowd things. If you have an aftermarket swaybar, you may have problems fitting the Koyo. Just fyi.

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Old 07-04-2006, 05:57 PM   #9
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Looks perfect to me. A hell of a lot better than the RX7 IC.
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Old 07-05-2006, 03:59 AM   #10
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Weight is an issue. Especially when its weight that is so far out on the nose. I say if you get decent intake temps with a smaller intercooler keep the smaller intercooler. To miatas weight literally worth its amount in gold - I wouldn't run anything larger than I aboslutely needed for an IC.
-Ryan
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Old 07-05-2006, 09:16 AM   #11
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I can't imagine that IC weighing much more than the RX7 unit even though it is signifigantly larger. Sparco is usually really good about reducing weight and keeping the quality good (although you usually pay through the nose for this).

Personally I think that IC may be a bit big for the TD04. You will probably see a pretty signifigant pressure drop over that mammoth. Of course, I have no practical turbo experience yet... so take my opinions with a grain of salt (or a shot of tequila).
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Old 07-05-2006, 10:24 AM   #12
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that bar and plate will probably be significantly heavier than the rx7 tube and fin side mount
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Old 07-06-2006, 02:15 PM   #13
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I traded my precision i/c (bar and plate) for an srt4 i/c (tube/fin), mostly b/c the srt4 i/c was about 7lbs and the precision i/c weighed about 20lbs lol. Bigger not always better. imo spearco is alittle large for your app.
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