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Old 07-21-2014, 06:25 PM   #1
DunDun
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Default Big TMIC hood scoop splitter help!

To all of you who have upgraded to a big TMIC, I am wondering what you did for a splitter on your hood scoop?

I have an 07 wrx with a generic big TMIC from ebay. The oem splitter won't fit and I have been driving it without a splitter for a while now. I didn't know how crucial it was to have one, but I know it will probably make my intercooler a lot more efficient.

I thought I could get an sti splitter, but the sti TMIC is still a lot smaller than mine so I don't think it will fit. I know there are some aftermarket options (like the grimmspeed one, or the process west) but they are pretty pricey and I don't want to order one that has no guarantee that it will even fit right. Most of them are made to fit specific intercoolers.

So I am wondering if most people buy these, and if so do they seem to fit correctly if you do not have the matching intercooler?
Or do most people mod their oem splitters. I searched and found a few people that have done this, but it seems like a lot of work.

Any input is appreciated. Thanks!
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Old 07-21-2014, 09:07 PM   #2
blubug_768
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I have a spearco intercooler and had to make a custom one, and the only other person I've actually met with the same intercooler did the same. I'm pretty sure the ebay ones are spearco nock offs so you probably will have to make one
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Old 07-22-2014, 01:20 PM   #3
Initial AWD
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wow like im kinda of having the same problem. I'm trying to put a sti intake manifold on so i can fit the sti process west IC on not sure if its going to work subaru says no other people says yes
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Old 07-22-2014, 01:29 PM   #4
AFBeefcake
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I run the Grimmspeed splitter with my jdm 02/03 scoop and a big TMIC.
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Old 07-22-2014, 08:55 PM   #5
BigRob74
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Quote:
Originally Posted by Initial AWD View Post
wow like im kinda of having the same problem. I'm trying to put a sti intake manifold on so i can fit the sti process west IC on not sure if its going to work subaru says no other people says yes
why on earth would you want to do this? you know process west makes an intercooler for the 08+ wrx right?
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Old 07-23-2014, 07:31 AM   #6
rexworx
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^^^^Rob^^^^ LMAO as always. Atleast explain cross sectional flow/thermal dispersion differences between the 2 different designs...

Last edited by rexworx; 07-23-2014 at 08:23 AM.
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Old 07-25-2014, 05:40 PM   #7
DunDun
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anybody else have some input on what they did with their splitter after putting on a bigger TMIC?
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Old 07-03-2015, 11:36 AM   #8
DunDun
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bumping this to get more opinions
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Old 07-05-2015, 08:26 AM   #9
Canonshooter
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Quote:
Originally Posted by DunDun View Post
I have an 07 wrx with a generic big TMIC from ebay. The oem splitter won't fit and I have been driving it without a splitter for a while now. I didn't know how crucial it was to have one, but I know it will probably make my intercooler a lot more efficient.
Intercoolers don't work entirely like a traditional radiator, it's better to think of them as a heat sink;

http://www.autospeed.com/cms/article.html?&A=0527

Like your big TMIC, I'm using a Perrin which weighs much more than a STi TMIC and also has much lower pressure drop (great for pre-boost throttle response). As the hot compressed air flows through it, most of the heat is removed via transfer to the TMIC itself, not to the air flowing through it. Since most people don't drive in boost all the time, the goal is to cool off the TMIC as much as possible between spools.

I am using a Subtle splitter on my '07 Forester, which fits the Perrin reasonably well. The splitter was designed for use with an '02-'03 WRX scoop, but I modified it to fit my lower OEM scoop (which I prefer the looks of).

I am also running an Aquamist water/meth injection system, so I get the benefit of "chemical intercooling" as well. Recently I tapped another nozzle into the system to spray the TMIC while in boost. It was more of a "fun mod" than anything else but at least in theory, wetting the TMIC with the water/alcohol mix will aid in cooling the IC down between spools.

Here are some photos showing my Subtle splitter modified to fit the stock FXT hood scoop and the installation of the extra nozzle;





























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