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Old 03-07-2013, 12:57 PM   #35226
vision.dynamix
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Old 03-07-2013, 01:11 PM   #35227
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Old 03-07-2013, 02:33 PM   #35228
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Regarding the splitter debate:

For at least a year I was running OEM splitter with STI sized scoop. I did not notice any decrease in performance when I ran it this way, nor did I notice any increase in performance when I finally added the STI splitter... just added peace of mind that I am now running it at optimal efficiency
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Old 03-07-2013, 02:51 PM   #35229
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Old 03-07-2013, 02:53 PM   #35230
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Quote:
Originally Posted by silverF4turbo View Post
Regarding the splitter debate:

For at least a year I was running OEM splitter with STI sized scoop. I did not notice any decrease in performance when I ran it this way, nor did I notice any increase in performance when I finally added the STI splitter... just added peace of mind that I am now running it at optimal efficiency
I believe it actually works. Here's the reason. The stock WRX one is crap but only half if not only a quarter of the intercooler is actually being used. This is measured by heat. After I upgraded to the STI scoop I didn't have the proper splitter so I removed stock splitter and again only about half the intercooler is getting used. I installed an after market splitter the whole intercooler gets used and after a hard run the intercooler is COLD to the touch while engine is scorching hot. I didn't measure the temperature but its the equivalent of putting a bag of ice onto the intercooler. The aftermarket splitter was heavy though. I ended up going FMIC soon after and never looked back. A few years later I decided to do a complete JDM swap so it was TMIC again. Sourced the JDM spitter which I still have and it worked just as good if not better than the heavy aftermarket one that fit the STI scoop I still had. It's also way lighter AND complete intercooler is sealed off.

I forgot who I was supposed to sell it to on here. LOL. my bad.
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Old 03-07-2013, 03:01 PM   #35231
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Quote:
Originally Posted by iNfEk View Post

I believe it actually works. Here's the reason. The stock WRX one is crap but only half if not only a quarter of the intercooler is actually being used. This is measured by heat. After I upgraded to the STI scoop I didn't have the proper splitter so I removed stock splitter and again only about half the intercooler is getting used. I installed an after market splitter the whole intercooler gets used and after a hard run the intercooler is COLD to the touch while engine is scorching hot. I didn't measure the temperature but its the equivalent of putting a bag of ice onto the intercooler. The aftermarket splitter was heavy though. I ended up going FMIC soon after and never looked back. A few years later I decided to do a complete JDM swap so it was TMIC again. Sourced the JDM spitter which I still have and it worked just as good if not better than the heavy aftermarket one that fit the STI scoop I still had. It's also way lighter AND complete intercooler is sealed off.

I forgot who I was supposed to sell it to on here. LOL. my bad.
How were you measuring temps? IR?

I think an argument can be made that a splitter that seals the IC is all that really matters. Obviously taller splitter is better, but the more I look at this the less I think the scoop matters.
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Old 03-07-2013, 03:04 PM   #35232
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Quote:
Originally Posted by DaveyPetey View Post

How were you measuring temps? IR?
Yes. Honestly though. It's night and day difference. Running without the PROPER type of splitter vs none at all.

You can physically feel the difference. Try putting your hand on the intercooler which has been heat soaked RIGHT after a long drive or a hard drive anyway without hesitating without a splitter. Then install and do the same drive you did in the first test. It will be COLD.

The duct seal really only isolates the intercooler to the scoop. But there is still an area that isn't meant to be sealed off that is for hot air to escape through the scoop.

The middle section is what directs all airflow to the bottom half of the intercooler whereas if it didn't have the middle diverter it would be just as useless as the stock one that has a duct seal.

A taller splitter for the taller scoop matters yes BUT if the splitter isn't installed or there is no middle diverter section it's just as useless and thus not really necessary since air flow isn't directed properly.

The scoop is completely functional. Unfortunately the USA gets ****tier and far inferior versions of everything that was made efficient in Japan

Last edited by iNfEk; 03-07-2013 at 03:12 PM.
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Old 03-07-2013, 03:54 PM   #35233
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I have a v7 splitter duct and seal under my hoodscoop. Perfectly matches my sti ic never have issues with it. When running the ic is cool to the touch. Might go to another chimney heat shield for the turbo to also benefit from direct air going to the hot section.
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Old 03-07-2013, 03:58 PM   #35234
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Quote:
Originally Posted by iNfEk View Post
Yes. Honestly though. It's night and day difference. Running without the PROPER type of splitter vs none at all.

You can physically feel the difference. Try putting your hand on the intercooler which has been heat soaked RIGHT after a long drive or a hard drive anyway without hesitating without a splitter. Then install and do the same drive you did in the first test. It will be COLD.

The duct seal really only isolates the intercooler to the scoop. But there is still an area that isn't meant to be sealed off that is for hot air to escape through the scoop.

The middle section is what directs all airflow to the bottom half of the intercooler whereas if it didn't have the middle diverter it would be just as useless as the stock one that has a duct seal.

A taller splitter for the taller scoop matters yes BUT if the splitter isn't installed or there is no middle diverter section it's just as useless and thus not really necessary since air flow isn't directed properly.

The scoop is completely functional. Unfortunately the USA gets ****tier and far inferior versions of everything that was made efficient in Japan
FMIC FTW
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Old 03-07-2013, 04:06 PM   #35235
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Quote:
Originally Posted by AnthonyWang View Post

FMIC FTW
It has its benefits as well as downfalls. The only way the FMIC is cooled is if you're moving. What this does is heat soak the condenser core for your AC so it won't be as cold also air flow through the radiator and condenser isn't as great. Those are kind of big problems if you use AC a lot which I do. It isn't that bad and still gets cold not as cold as if the intercooler core wasn't there.

Additional piping causes things to be less efficient than a TMIC could but you also get the benefit of it not being heat soaked by the turbo charger. To each their own. I prefer FMIC though. LOL
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Old 03-07-2013, 04:31 PM   #35236
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Quote:
Originally Posted by iNfEk View Post

Yes. Honestly though. It's night and day difference. Running without the PROPER type of splitter vs none at all.

You can physically feel the difference. Try putting your hand on the intercooler which has been heat soaked RIGHT after a long drive or a hard drive anyway without hesitating without a splitter. Then install and do the same drive you did in the first test. It will be COLD.

The duct seal really only isolates the intercooler to the scoop. But there is still an area that isn't meant to be sealed off that is for hot air to escape through the scoop.

The middle section is what directs all airflow to the bottom half of the intercooler whereas if it didn't have the middle diverter it would be just as useless as the stock one that has a duct seal.

A taller splitter for the taller scoop matters yes BUT if the splitter isn't installed or there is no middle diverter section it's just as useless and thus not really necessary since air flow isn't directed properly.

The scoop is completely functional. Unfortunately the USA gets ****tier and far inferior versions of everything that was made efficient in Japan
I'd be willing to bet the function of a TMIC with a given sealing splitter is the same regardless of the scoop. I'd even say running no scoop and just the splitter would yield the same results as long as the splitter elements extend above the level of the hood. It's not as if the scoop has a tight baffle to the splitter.
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Old 03-07-2013, 04:34 PM   #35237
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Quote:
Originally Posted by iNfEk View Post
It has its benefits as well as downfalls. The only way the FMIC is cooled is if you're moving. What this does is heat soak the condenser core for your AC so it won't be as cold also air flow through the radiator and condenser isn't as great. Those are kind of big problems if you use AC a lot which I do. It isn't that bad and still gets cold not as cold as if the intercooler core wasn't there.

Additional piping causes things to be less efficient than a TMIC could but you also get the benefit of it not being heat soaked by the turbo charger. To each their own. I prefer FMIC though. LOL
yeah true.
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Old 03-07-2013, 04:42 PM   #35238
iNfEk
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Quote:
Originally Posted by DaveyPetey View Post

I'd be willing to bet the function of a TMIC with a given sealing splitter is the same regardless of the scoop. I'd even say running no scoop and just the splitter would yield the same results as long as the splitter elements extend above the level of the hood. It's not as if the scoop has a tight baffle to the splitter.
The hood scoop is to cover up the splitter which would/does extend above the hood. If you don't have a splitter above the hood and just put that screen thing that bolts to the hood and leave your TMIC there I'm quite sure that it won't cool as well nor will it do anything more than allow hot air to come out of the hole in the hood. It would also allow for the intercooler to be heat soaked a lot faster since heat rises and there's no directed air to cool if off. The hood scoop isn't functional without a splitter. If you take the splitter off and run the good scoop it will only direct air to about a quarter to half the intercooler.

Unless you're saying take the hood scoop off and lay a flat piece of metal in place of a splitter that has a center channel/diverter that doesn't extend past the hood being as functional if not more functional than an a scoop that actually catches the air that pass through it then I'd say that's wrong and is take that bet.
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Old 03-07-2013, 04:52 PM   #35239
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No I'm saying a well designed splitter does the lions share of the work for cooling the TMIC. I really don't thing the scoop does much, at least at low to medium speeds IF the splitter extends above the hood. Maybe at higher speeds the scoop extends above increasing turbulent air flow created by the hood, but if the elements of the splitter don't also extend up there I bet it's purely cosmetic.
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Old 03-07-2013, 04:57 PM   #35240
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Quote:
Originally Posted by DaveyPetey View Post
No I'm saying a well designed splitter does the lions share of the work for cooling the TMIC. I really don't thing the scoop does much, at least at low to medium speeds IF the splitter extends above the hood. Maybe at higher speeds the scoop extends above increasing turbulent air flow created by the hood, but if the elements of the splitter don't also extend up there I bet it's purely cosmetic.
Gotcha. That's why I said the stock splitter and scoop are crap. The stock scoop is functional because its ducted and sealed to the intercooler. However, the splitter on the stock WRX (not STI) scoop is just open so no diverter. I believe it doesn't extend much above the hood since the scoop is very tiny. My referencing to a functional scoop is to the stock STI or upgraded JDM STI scoop that we have to use in order to use a functional (or stock version 7 STI) splitter. Which does extend above the scoop tremendously and the diverter does as well.
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Old 03-07-2013, 05:05 PM   #35241
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Quote:
Originally Posted by iNfEk View Post

Gotcha. That's why I said the stock splitter and scoop are crap. The stock scoop is functional because its ducted and sealed to the intercooler. However, the splitter on the stock WRX (not STI) scoop is just open so no diverter. I believe it doesn't extend much above the hood since the scoop is very tiny. My referencing to a functional scoop is to the stock STI or upgraded JDM STI scoop that we have to use in order to use a functional (or stock version 7 STI) splitter. Which does extend above the scoop tremendously and the diverter does as well.
So do you guys think a splitter that has any sort of gap between the uppermost part of it's diverter and the roof the scoop is detrimental? In my mind any gap will cause turbulence and/or pressure to build above and around the TMIC, decreasing laminar flow through it. Is anyone's bug set up to actively draw air through the TMIC by creating more negative pressure in the engine bay?
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Old 03-07-2013, 05:17 PM   #35242
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My bug as it sits today. Hopefully this weekend I will wash, clay and wax it.


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Old 03-07-2013, 05:38 PM   #35243
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I want a Red Bug soooooo bad , would be planning on getting rid of anytime soon? Im aslo in CT
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Old 03-07-2013, 05:46 PM   #35244
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I want a Red Bug soooooo bad , would be planning on getting rid of anytime soon? Im aslo in CT
NO WAY I'M IN CT TOO! jk
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Old 03-07-2013, 05:52 PM   #35245
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Quote:
Originally Posted by DaveyPetey View Post
So do you guys think a splitter that has any sort of gap between the uppermost part of it's diverter and the roof the scoop is detrimental? In my mind any gap will cause turbulence and/or pressure to build above and around the TMIC, decreasing laminar flow through it.
Yes this is how I see it. I haven't modified my stock splitter at all, and my IC is always cold to the touch unless I let the car sit hot for extended periods since I have no turbo heat shield. I might cut my splitter in summer and bend it upwards to utilize the full height of the scoop.

I plan on installing Grimmspeed 8mm phenolic spacers when I delete my TGVs so my intake manifold should be cool after a drive instead of scorching hot as it gets now. Anyone have any experience with these?

So my post doesn't do without photos.. washed my car!
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Old 03-07-2013, 06:02 PM   #35246
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Quote:
Originally Posted by DaveyPetey View Post

So do you guys think a splitter that has any sort of gap between the uppermost part of it's diverter and the roof the scoop is detrimental? In my mind any gap will cause turbulence and/or pressure to build above and around the TMIC, decreasing laminar flow through it. Is anyone's bug set up to actively draw air through the TMIC by creating more negative pressure in the engine bay?
It could... But that's why the splitter section towards the right isn't mated directly to the whole side. There is a grille cut out so that are flow can touch the other areas of the engine bay. The duct sealing provides continuous airflow only to the intercooler (well through it) which would also go to cool the rear half of the engine and transmission in theory. If there wasn't that cut out on either an aftermarket splitter or oem one you would be correct for the additional turbulence.
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Old 03-07-2013, 07:04 PM   #35247
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just finished these little gems
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Old 03-07-2013, 07:14 PM   #35248
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Quote:
Originally Posted by brett192
I plan on installing Grimmspeed 8mm phenolic spacers when I delete my TGVs so my intake manifold should be cool after a drive instead of scorching hot as it gets now. Anyone have any experience with these?
Phenolics are the truth. You won't be disappointed. There are 10mm out there somewhere, may as well go the extra step
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Old 03-07-2013, 08:14 PM   #35249
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I want a Red Bug soooooo bad , would be planning on getting rid of anytime soon? Im aslo in CT
i thought about it to help fund a nice 240 build, but i kept it and built a ****ty drift car instead lol
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Old 03-07-2013, 08:15 PM   #35250
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these are old pics,



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