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Old 06-06-2012, 11:43 AM   #1
ScoobyDoo12
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Thumbs up Subtle-Solutions Intercooler Splitter Review

Finally got around to posting this review up on all the STI forums... Hope it helps someone out! See below:


I purchased the splitter from Subtle-Solutions @ this link Subtle Solutions

It was shipped fast and I had it within a couple of days after I ordered it, Opened the box and as you can see it was packed very well...







Super Safe...


They supply new bolts and washers if you want to use them...



Unpacked and laid on the floor...



Upside down...



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Old 06-06-2012, 11:46 AM   #2
ScoobyDoo12
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Different angle...



Install was a piece of cake... finished in 5 minutes...

Engine Bay before Install...



Take the Left IC Bolt out and everything simply stays in place and stays lined up...



Take the Right IC Bolt out as well...




Splitter fits nice and snug with no bolts in place. The red padding gives it a safe way to sit snug on the surface...






Pretty simple.... Put the Bolt in the hole and tighten it down on both sides...




Bolts in and tight...




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Old 06-06-2012, 11:47 AM   #3
ScoobyDoo12
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Installed Product.... as you can see I placed the supplied decal on this piece as I have done with all there products





Angled down to see straight on profile...



No Fitment Issues at all... This is with the hood shut looking and it threw the hood scoop...



A little closer and the flash to show the dirty car as well...



And finally the full view of the engine bay after install....




Thoughts:
Just like the other pieces that I dressed up the bay with from Subtle, Its a nicely made sturdy piece of lightweight aluminum that has a good powder coat black finish. Best of all, its made in the USA! Quality and Fitment was great and the install was super easy.

Now I've driven with it on the car for a little over a week and I've had multiple long drives in the recent 90+ degree weather. I know its hard to back claims from the famous butt dyno so take this as you may, but even with the heat the car never seemed to have any effects from the heat. I think this splitter does its job and distributes the fresh air to the entire surface of the IC. I do have a trip coming up where Ill be in the car for 6+ hours and I can report back anything more I conclude.

Id recommend this piece to anyone that wants one of those simple quick mods that is quick and wants to dress the bay up and give each fin on the IC the air it deserves.


Just to add, I have had the other pieces for close to a year now and there made out of the same material and per the pictures you can see that they are still in perfect condition. So these pieces are built to last and look good for a long time!
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Old 06-07-2012, 08:12 AM   #4
growling_boxer
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Do you lose the rubber bellows that keeps air from escaping around your TMIC when you install this? That's what it looks like, and if that is the case, this seems very counter-productive.
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Old 06-07-2012, 08:55 AM   #5
The Duke
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Quote:
Originally Posted by growling_boxer View Post
Do you lose the rubber bellows that keeps air from escaping around your TMIC when you install this? That's what it looks like, and if that is the case, this seems very counter-productive.
I'm still trying to figure out how effective these things are.

The intercooler splitter design came from Zerosports in the 90s who made them before they were common on STis. Starting in around 02 (GD), subaru started equiping them as OEM stock (on STis first, then a version on the WRX). It's just a piece of molded plastic and I'd imagine the engineers at subaru placed it exactly where they wanted. Not like they had to worry about making unsightly, etc.

Unfortunately I haven't come across someone who has recorded hard data to make a proper argument for them.
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Old 06-07-2012, 09:07 AM   #6
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my issue is that you don't seem to have the rubber bellows that is normally fastened to the bottom of the stock splitter, and without that, air isn't forced over the IC. additionally, air can easily push into the engine bay, which causes high pressure in the engine bay (behind the radiator and IC). without that bellows, you make both your IC and your radiator significantly less effective, particularly in a track environment.
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Old 06-07-2012, 09:20 AM   #7
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Quote:
Originally Posted by growling_boxer View Post
Do you lose the rubber bellows that keeps air from escaping around your TMIC when you install this? That's what it looks like, and if that is the case, this seems very counter-productive.
No. This product does not interfere with any portion of the hood, integrated hood scoop, or stock plastic diverter.
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Old 06-07-2012, 09:25 AM   #8
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Quote:
Originally Posted by growling_boxer View Post
my issue is that you don't seem to have the rubber bellows that is normally fastened to the bottom of the stock splitter, and without that, air isn't forced over the IC. additionally, air can easily push into the engine bay, which causes high pressure in the engine bay (behind the radiator and IC). without that bellows, you make both your IC and your radiator significantly less effective, particularly in a track environment.
I think you are confused just a bit. The newer aged Imprezas do not have a splitter w/ bellows like the older GD models. The hoodscoop is integrated into the hood on the newer WRX & STI, and there are no large bellows present. Alos, the older Impreza's and even the Forester had horizontal diverter vanes built into their stock splitters. The newer Impreza's have just an open hood scoop, which causes the air to flow only to the rear 2/3'rds of the TMIC. You'll notice a large dirt line and stone chips on the rear of your TMIC over time if you do not have a splitter that distributes the air equally such as the product listed above.
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Old 06-07-2012, 09:54 AM   #9
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Picture showing our TMIC Splitter and the stock integrated rubber section of the hood.

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Old 06-07-2012, 11:17 AM   #10
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Quote:
Originally Posted by Subtle-Solutions View Post
I think you are confused just a bit. The newer aged Imprezas do not have a splitter w/ bellows like the older GD models. The hoodscoop is integrated into the hood on the newer WRX & STI, and there are no large bellows present. Alos, the older Impreza's and even the Forester had horizontal diverter vanes built into their stock splitters. The newer Impreza's have just an open hood scoop, which causes the air to flow only to the rear 2/3'rds of the TMIC. You'll notice a large dirt line and stone chips on the rear of your TMIC over time if you do not have a splitter that distributes the air equally such as the product listed above.
Ah, that makes a lot more sense. I am not very familiar with the GR specifics, but I am trying to find some nice things for a couple friends to do once I finally get them into some Subarus. They are both searching for GRs. I can't say I really understand why Subaru would have gone away from their old splitter design that was effective on the GD, especially on the STi.
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Old 12-29-2013, 10:51 PM   #11
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Just wanted to add to this thread since I got this splitter a few months ago and I have been recording intake temps to see if there was a noticeable effect.

Up to this point, I can say yes.

The explanation given by Subtle is that it directs air flow directly into the intercooler especially the lower part of the intercooler where air just passes over. This mod alone only decreases intake temps about 2-3 degrees. But since intake temps are taken at the maf sensor locatation (pre-turbo) the intake charge (post turbo) must be much cooler and would not necessarily show up in my intake temp data. Also, before the splitter I was not able to touch the intake manifold right after the commute. After adding the splitter the intake manifold was only warm. The only cooling mods I have before the splitter are turbo blanket and heatshield.

I found that the intercooler and splitter were heat soaked by the turbo. At that point, put DEI gold tape on the Y-pipe, intercooler, and splitter. This reduced my recorded intake temps an average of 20 degrees. While moving, intake temperatures were 12 degrees above ambient. After runs, I touched the intake manifold. It was cool, not warm. I would say about ambient temperature.

What I think is happening is that the splitter is causing a high pressure area right above the intercooler which not only increases the intercooler efficiency but also but also helps to ventilate the engine bay a little better.

Another thing I noticed after putting on the splitter was that the cabin ventilation temperature seem to be slightly warmer and had a little more engine smell to it. So the engine bay air circulation must have changed.

Also, there was no effect on coolant temps. All coolant temps stayed within 190-200 degrees.

Overall, I am happy that I purchased the splitter. Although I did not accurately measure the effect on the intake charge itself, I do know it is having a positive cooling effect overall.
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Old 01-04-2014, 08:37 PM   #12
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I too have joined you and I'm happy with mine!!





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Old 01-08-2014, 07:40 PM   #13
Subtle-Solutions
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I too have joined you and I'm happy with mine!!





Thanks again for the business and (+) feedback/review.

" I'm super pleased with it. Beyond belief. And coupled with the new v3 accessport. I've been able to log intake temp with a 11 degree difference. So. I'm oober satisfied. Plus. The red is just eye candy galore. Thanks again!! "

*** We only have a limited # of Powder Coated (red) and (blue) splitters in stock. Get yours before they are sold out! ***

Attached Images
File Type: jpg SUBTLE - 08 STI TMIC Splitter 1.JPG (53.9 KB, 189 views)
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