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Old 01-30-2009, 04:13 PM   #21
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You'll recover whatever gains you might lose from having a longer/wider IC due to getting more of it in direct airflow IMO. My eBay core is 3x12x18 and it shows just over 1 psi drop at 11psi and just over 1.5psi at 16psi. And one disadvantage to most of the eBay cores that are taller is that inlet is offset to the top/bottom and end tanks are a crappy design for an offset inlet. This is a nice end tank IMO:
http://www.amber-performance.co.uk/m...2006044650.jpg


In your case, moving the inlet/outlet vertical has a better fit for the end tank shape (even with the bump )
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Old 01-30-2009, 04:19 PM   #22
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I suspect a 2 coupler setup will blow couplers a lot, due to engine flex. Couplers are cheap. 2.5" couplers i have for under $10
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Old 01-30-2009, 04:34 PM   #23
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You and Pat are right. I am going with 4 couplers
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Old 02-06-2009, 01:04 AM   #24
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Looky what came in the mail today:



the quality of the couplers isnt great, I actually dont even think they're silicone, but we'll see how they hold up. for 70 bux shipped its a shitload of piping, and just what I need to finish this **** up. tomorrow I'll get crackin on it


*edit: just called a buddy and he has 4 good REAL silicone couplers for me to use so if anything Itl be fun blowing these up

Last edited by 18psi; 02-06-2009 at 03:45 AM.
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Old 02-06-2009, 01:53 AM   #25
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Nice work. I'll be doing something similar w/ a PWR downflow IC, aluminum tubing from the turbo to the IC inlet and new FM II silicone tubing from the IC to the TB. I'll post pics when it's done.

Last edited by twothirdsCobra; 02-06-2009 at 01:23 PM.
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Old 02-06-2009, 12:29 PM   #26
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I have a similar TDR clone set-up that I made up a few years back using a Mitsubishi Starion intercooler...



Straight 2" piping from turbo to inlet, Mitsubishi Starion IC mounted upside down, 2.5" outlet straight into TB. The radiator brackets were lowered by about 1" and the radiator tilted backwards slightly.

Now looking to get a bigger IC to fill the mouth area and I've found the perfect size intercooler off the shelf at a UK supplier, Rally Design.

20" x 11" x 3" with 2.5" pipes.
http://www.rallydesign.co.uk/product_info....oducts_id=14182
Reasonably cheap and should do the trick nicely

Rich
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Old 02-06-2009, 02:00 PM   #27
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Quote:
Originally Posted by 18psi View Post
Looky what came in the mail today
Where did you get the tubing and couplers? $70 sounds right up my alley. Even though the couplers dont look very high quality, I think they would work for me. And what kind of clamps are those? Cant tell in the pictures.

Any reason you didnt just go with a pre made intercooler with inlet and outlet at the ends of the tanks, like a top mount/v mount would have? Price? Ive seen a few on ebay for $120-$140 with similar core size, slightly taller and shorter with end tanks already like you would have needed.
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Old 02-08-2009, 03:17 AM   #28
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I got the piping/couplers from fleabay...

OK MAJOR UPDATE AND HUGE CHANGE

After much measurements and debate about size/efficiency/fitment/etc we decided to scrap the 26x7x2.5 intercooler install and go with this bad boy right here:



There are a several reasons for this:
1) it is much better suited for a miata "over the rad" routing than the other one for its dimensions (forgot to measure, but I will)
2) it is tube and fin, as opposed to bar and plate, therefore should be a bit more efficient, as well as less pressure drop since its narrower.

So here is what we did:

removed rad


removed rad brackets


lowered the sway bar about 1.5" to be able to lower rad and move it back while retaining stock fans


attached rad bracket this way (which is cool since you only have to drill/thread 1 bolt hole)


this opened up a shitload of space in the front


made badass radiator/condenser brackets that hold them so damn strong/secure its better than stock




threw on bumper to see how it sits



Then we welded straight pointing tubes to the intercooler and welded the piping, unfortunately I didnt take pictures of it. Will take some when we finish this up.

Overall this setup is definitely not a piece of cake and required a bunch of creativity, but gets me short and bulletproof piping retaining a/c and power steering while not modifying anything major or doing any significant cutting.

More to come
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Old 02-08-2009, 05:15 AM   #29
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Right on man, looks like you have really made a change for the better in a big way. This should be a really nice ic setup.
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Old 02-08-2009, 05:48 AM   #30
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kind of looks like a stock Evo intercooler.
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Old 02-08-2009, 08:53 AM   #31
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Wow, I didn't realize you had updated this thread. This intercooler setup looks like its going to be amazing. I love the remounting of the rad. With the rad remounted where it is, do you think you will have room for a thicker all allum. rad in the future?
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Old 02-09-2009, 03:22 AM   #32
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Definitely. Not behind the rad but in front of it
I think I moved everything back a bit too much, but that wont hurt anything IMO
Hell, just gives me as much room as I want to mount bigger **** if I feel like it in the future lol
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Old 02-09-2009, 09:11 AM   #33
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I've got that same aluminum/couplers kit, if your having problems getting the coupler on, just run a hair dryer through it for a minute and it will become more malleable. Nice job on the new setup.
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Old 02-09-2009, 11:21 AM   #34
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+1 this is awesome great work! Do you know if the rad mounting brackets are the same in the NA and NB models? I would love to have an over the rad setup on my 90
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Old 02-09-2009, 05:01 PM   #35
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Is that a Starion intercooler? Pipes look like the same as mine did before I chopped them off and had bigger ones welded in.

Rich
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Old 02-09-2009, 11:07 PM   #36
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thanx guys. dont know what its off of, or if the brackets are the same.
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Old 02-10-2009, 09:04 AM   #37
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Quote:
Originally Posted by 18psi View Post
thanx guys. dont know what its off of, or if the brackets are the same.
It's a Starion, you can tell by the pipe orientation. Core size is 16" x 12" x 2.5", right?

I have this like you are planning, but I'm about to upgrade to a bigger one. At 250hp, I'm seeing a +15 DEGC increase in intake temp over a full throttle power run (that was back in September when ambinet temp was ~20DEGC).

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Old 02-15-2009, 04:24 PM   #38
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all further progress can be found on this page:
https://www.miataturbo.net/forum/t31240/#post368866
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Old 11-26-2009, 04:33 AM   #39
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Really great set-up (I came over from the finished photos section. Thanks so much for the really informative build pics.
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Old 11-21-2012, 04:24 PM   #40
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Hey 18psi!

Since I'm lazy and have heard good things about your car (mostly from yourself), I wanted to copy your design. But after only 3 years, your images have vanished. What's up with that? How is a dishonest cloner supposed to build a car around here if all the images are missing?
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