[halfelite]

Originally Posted by snorky

oh you're talking about removing the inlet snorkel that connects to the snorkus.


the hood is sealed up front... unless you remove the seals, you're not going to get more flow.

Doesnt it seal around the inlet snorkel so if you remove it there is a gap.

[05'WRB]

Originally Posted by snorky

do you not run the stock diffuser and seal or were they removed just for those pictures?

No, I don't have that on. I am leaving it with the stock hood. I may fab up something maybe just for the back but will leave the 2 sides and the front side opened. If everything were really tightly sealed, there wouldn't be any openings for the heat to escaped from under the hood. It may be good for the intercooler but you loose the other function of the scoop I guess?
I don't know what it means but I went for a drive couple nights back in cool 50F, but even with the fan off, the ic was very cool to touch on all area/corner of the ic.
I will try to fab up a bracket for the other fan on the driver side of the ic, and I will lower the whole fan brackets and all 3/8" to 1/2" so the fan sits lower up on top of the scoop.

[05'WRB]

Originally Posted by halfelite

Doesnt it seal around the inlet snorkel so if you remove it there is a gap.

I just left mine's out. It sounds so good without it when the turbo spool up.

[snorky]

Originally Posted by 05'WRB

No, I don't have that on. I am leaving it with the stock hood. I may fab up something maybe just for the back but will leave the 2 sides and the front side opened. If everything were really tightly sealed, there wouldn't be any openings for the heat to escaped from under the hood. It may be good for the intercooler but you loose the other function of the scoop I guess?
I don't know what it means but I went for a drive couple nights back in cool 50F, but even with the fan off, the ic was very cool to touch on all area/corner of the ic.
I will try to fab up a bracket for the other fan on the driver side of the ic, and I will lower the whole fan brackets and all 3/8" to 1/2" so the fan sits lower up on top of the scoop.

You don't have a basic grasp of how intercoolers function or the way that under hood temps are controlled. I don't mean it as an insult, I'm just going off what you've written here.

The hood scoop and its associated parts under the hood are not designed to let heat out or to cool the engine bay. They are there purely to force air through the intercooler.... and theres an outlet on the diffuser that pours air on the turbo.

Simply put, you need the seal around the intercooler and you need the diffuser. The STI comes with well engineered pieces from the factory. Some one once told me, "They don't put parts on a car if they don't have to. If you know why they put it on and know you don't need it, take it off. If you don't know why they put it on, leave it on."

Air takes the path of least resistance. Without the seal that is attached to the underside of the diffuser, air goes around the intercooler instead of through it. This is because it is very difficult for the air to travel through the intercooler. It has to squeeze through all those little vanes. The surface of the IC may be cool the way you have your car set up now but this is only because air is traveling along the IC's surface. I guarantee that the middle and underside of the IC are very hot.

The diffuser inside the hood scoop spreads air across the face of the intercooler and it does a decent job up to a certain speed on the stock IC. AFAIK no one has developed a competent aftermarket diffuser with any sort of empirical backing.

Without the diffuser, most of the air will travel through the back of the IC.

Without the diffuser and the seal, most of the air is traveling behind the IC near the firewall.

On to engine bay heat...

Heat is pulled from the engine bay via the underside of the car. While the car is moving along the road, vacuum is created between the car and the road. This vacuum is what allows air to travel through the radiator and through the engine bay with little resistance. The factory under tray aids in this heat scavenging effect.

If I owned or had legal access to a wind tunnel, I would show you. I know it's true without seeing it because it's basic fluid mechanics... air is a fluid...

[snorky]

Originally Posted by halfelite

Doesnt it seal around the inlet snorkel so if you remove it there is a gap.

yeah you're right but you have a huge gaping hole right below there where the radiator sits.

[05'WRB]

Originally Posted by snorky

You don't have a basic grasp of how intercoolers function or the way that under hood temps are controlled. I don't mean it as an insult, I'm just going off what you've written here.

The hood scoop and its associated parts under the hood are not designed to let heat out or to cool the engine bay. They are there purely to force air through the intercooler.... and theres an outlet on the diffuser that pours air on the turbo.

None taken.
I do understand that air needs to travel through the ic fins to get the max cooling. One of the reasons I left it off is because I don't want the hassle of removing it with all those plastic clips and now that I have those fans, I don't think it'll fit into the CF scoop. If a diffuser to be installed, I will have to make one for it.
I know that ideally, it would be best if an force air/ram air type of effect going to the tmic. Plus a stock type of deflectors is good if there's an easy way to make one fit under the CF scoop. AT lease the fans will do a good job of forcing air throught the ic. Not in the best posible positions but better than none.

[05'WRB]

Here's phase 2. Intalled the other fan on the driver side. Lowered both fans 3/8" closer to the ic. When out for a drive, came back and let her idle for about 10-15 mins with both ic fans running, cooling fans kicked on 3 times so you know that time it was running to operating temp.
I than shut off the car and open up the hood to see what difference if any with the ic fans. I am please to tell you that the fans made a difference. The parts of the ic with the fans feel cool to touch on top and on the bottom of the ic. As I moved my hands closer to the side of the turbo, it gradually got hotter to the point where I can not longer keep my hands on the ic. Ideally it would be even better if I can get 3 fans right across the whole cooler ( maybe another time? ). Regardless, I think it was a success battling against heat soak at idle/slow speed, and the fans didnt' impede air flow at driving speed to the tmic. I think this would be a great mod for those who's into auto cross/drag.

[STI-LOS]

Originally Posted by 05'WRB

Here's phase 2. Intalled the other fan on the driver side. Lowered both fans 3/8" closer to the ic. When out for a drive, came back and let her idle for about 10-15 mins with both ic fans running, cooling fans kicked on 3 times so you know that time it was running to operating temp.
I than shut off the car and open up the hood to see what difference if any with the ic fans. I am please to tell you that the fans made a difference. The parts of the ic with the fans feel cool to touch on top and on the bottom of the ic. As I moved my hands closer to the side of the turbo, it gradually got hotter to the point where I can not longer keep my hands on the ic. Ideally it would be even better if I can get 3 fans right across the whole cooler ( maybe another time? ). Regardless, I think it was a success battling against heat soak at idle/slow speed, and the fans didnt' impede air flow at driving speed to the tmic. I think this would be a great mod for those who's into auto cross/drag.

Whats up dude, first time I have actually found this thread... Its pretty cool your trying to figure something out for the Heatsoak issues with TMIC.. I Currently runa DOM 3 with a APS TMIC so I know about heatsoak, but running the Meth and I used a combo of Thermotec heat wrap on the I/C and Gold Foil, alos ran a Turbo Blanket. I dynoed it and drove back home which was a 2 hour drive a fun one at that with the new Snail and I pulled over and I could keep my hand on the I/C side right over the Turbo. So let me know how this works out cause I am always looking for new ways to keep the I/C cool... Good to see someone trying... Good Luck TMIC FTW..

[05'WRB]

Originally Posted by STI-LOS

Whats up dude, first time I have actually found this thread... Its pretty cool your trying to figure something out for the Heatsoak issues with TMIC.. I Currently runa DOM 3 with a APS TMIC so I know about heatsoak, but running the Meth and I used a combo of Thermotec heat wrap on the I/C and Gold Foil, alos ran a Turbo Blanket. I dynoed it and drove back home which was a 2 hour drive a fun one at that with the new Snail and I pulled over and I could keep my hand on the I/C side right over the Turbo. So let me know how this works out cause I am always looking for new ways to keep the I/C cool... Good to see someone trying... Good Luck TMIC FTW..

I can tell you that it works.
Last week, I was in a stop and go rush hour traffic (1.5hr) in high 80/low 90 degrees temp. I'd turned both fans on, and once I go to my destination, immediately I poped the hood and check my tm. The driver side of the ic is at ambience temp. and as I moved my hand across towards the turbo side (with no fan), it got warm and than hot as it got closer to the turbo. I just got the stock shield/stock turbo. No other shields/wraps.
To further add to this project, I will eventually get another fan for the turbo side of the tmic. Wired up to another switch so I get the option of turning either fans on/off. This will give me a total of 750 cfm.
The other thing I found is that when the car is moving, the fans has no effect of blocking the air flow to the ic. It stayed cool/ambience temp. ( to the touch ) throughout the whole ic, that includes the turbo side as well. I don't need to use the fans when the car is moving. The best of both world imho.
All this without those stock ic seals around the scoop. My Turbo xs tm sits higher than the stocker, and the combo seems to be doing a good job of cooling the ic the way it is. Plus I want to leave it off so there's a chance for the hot air in the engine bay to escape throught the scoop once parked/stop or I can turn on the fans to draw cool air in.

[KiTsuNe]

im curious as to how well this works if you have a thicker intercooler such as the spearco + phenolic spacers.

[blindfold]

with the turbo giving off massive amount of heat, would you exepct to the TMIC section that's closer to it to be hotter anyways? It would be diffcult to see if the fans are impeding airflow when you are moving, of course the core will eventually reach ambient temperature, but could it have reached the cooler temperater at a faster rate withtout the fans...hard to say.

This is still innovative, keep up the good work.

[05'WRB]

Originally Posted by KiTsuNe

im curious as to how well this works if you have a thicker intercooler such as the spearco + phenolic spacers.

My Turbo xs is 4.5" and it's the same thickness as a spearco.


blindfold, Yes I would expect it to be hotter on the turbo side anyways. Maybe I should have put a fan on the turbo side first but it will be done at another time. I find it difficult to believe but according to this person on NASIOC who'd said his thermo imaging found the driver side to be hotter or has more hot spots vs passenger side?? And that's one of the reason I put the other fan on the driver side instead of on the turbo side. No biggy though.
I do agreed with you that there's no way for us to know if the fans prevent the tmic from cooling down slower under normal driving condition. If I did, I think it may not be measurable/not a big difference, imho. This is base on where the fans are and how much was block off from the top of the scoop where the air enters.
In reality I don't really need this mod with my conservative (17psi) stage 2, but I have the satisfaction knowing it can be done.

[halfelite]

Originally Posted by 05'WRB

My Turbo xs is 4.5" and it's the same thickness as a spearco.


blindfold, Yes I would expect it to be hotter on the turbo side anyways. Maybe I should have put a fan on the turbo side first but it will be done at another time. I find it difficult to believe but according to this person on NASIOC who'd said his thermo imaging found the driver side to be hotter or has more hot spots vs passenger side?? And that's one of the reason I put the other fan on the driver side instead of on the turbo side. No biggy though.
I do agreed with you that there's no way for us to know if the fans prevent the tmic from cooling down slower under normal driving condition. If I did, I think it may not be measurable/not a big difference, imho. This is base on where the fans are and how much was block off from the top of the scoop where the air enters.
In reality I don't really need this mod with my conservative (17psi) stage 2, but I have the satisfaction knowing it can be done.

If you want any other thermal images just ask i can give any angle you want and under most conditions

[STI-LOS]

Originally Posted by 05'WRB

My Turbo xs is 4.5" and it's the same thickness as a spearco.


blindfold, Yes I would expect it to be hotter on the turbo side anyways. Maybe I should have put a fan on the turbo side first but it will be done at another time. I find it difficult to believe but according to this person on NASIOC who'd said his thermo imaging found the driver side to be hotter or has more hot spots vs passenger side?? And that's one of the reason I put the other fan on the driver side instead of on the turbo side. No biggy though.
I do agreed with you that there's no way for us to know if the fans prevent the tmic from cooling down slower under normal driving condition. If I did, I think it may not be measurable/not a big difference, imho. This is base on where the fans are and how much was block off from the top of the scoop where the air enters.
In reality I don't really need this mod with my conservative (17psi) stage 2, but I have the satisfaction knowing it can be done.

Cool man. Yeah keep up the good work..

Carlos

[05'WRB]

Originally Posted by halfelite

If you want any other thermal images just ask i can give any angle you want and under most conditions

No biggy but thanks anyway. Nothing is perfect but what ever mods we do is better then stock in most cases. I am sure someone will have an even better idea. That is what's all about, keep improving on the current ideas.