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Old 09-09-2009, 04:55 PM   #1
Circuit Motorsports
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Default Beat The Heat

As many of you know heat is your enemy in the engine bay. It heats up your intercooler, engine, hoses, oil and coolant. Everything is connected in some way, and you may not even realize it. A coolant line could be near a heat source, and is inadvertantly being superheated as it passes by. These are things you have to look for when modifying a car and moving things from their stock positions.

We are big advocates of drivability and cooling. So when we recently switched our GDF STi from a FMIC to a TMIC we looked into keeping it as cool as possible in our modfied engine bay.

For reference we are running a FP 20g, with the TD06h housing and 8cm wheel, the biggest 20g out there. We are also using an APS 65mm CAI and a Perrin TMIC.

We decided to tackle the biggest heat generator in the Subaru engine bay, the Turbocharger and downpipe. We went with DEI's new Titanium brand heat wrap and turbo blanket kit (full specs in our FS thread). So far we are very impressed.

The blanket is made completely from the Ti wrap. It is woven together to form a double thick blanket and sewed on the edges to create a nice saddle effect. This makes it fit snuggly over the turbo housing effortlessly. The best part about it's single material construction is that there is no shell stuffed with a fiberglass weave. Therefore there is nothing to seperate and fall apart. It's a solid piece. It also allows for a lower overall profile, so it fits under an IWG actuator arm, no interference whatsoever.

There are 3 metal hooks riveted to the blanket, so you can anchor it to the turbo and downpipe. The blanket fit completely over the hotside housing of our 20g and we secured it with the provided safety wire, it isn't going anywhere.

We then moved on to wrapping our downpipe, we did this prior to installing it in the car. One 2"x50' roll wrapped our Invidia downpipe all the way back to the first hanger bracket, and we had some leftover. It was easily wrapped around the the pipe and secured with the 14" SS locking ties we got form DEI. We used no spray adhesive, we figured securing it tightly with 6 locking ties spaced about 6" apart would be enough. This stuff has a nice slick feel already, so it should have no problem shedding water.

Once the downpipe was mated up we ran the car and let the wrap heat cycle a few times. We noticed that the DP and turbo flanges still gave off a lot of heat, so we used our extra Ti wrap and completely covered up the flanges, securing it on the downpipe with more locking ties.

You can see the difference here:

Unwrapped Flanges



Wrapped Flanges:




Now we are very impatient when it comes to mods, so that leads to be less than scientific. We just like installing stuff, what can we say

However the difference in heat is immediately noticeable. Where before we couldn't even hold our hands over the turbo/DP area after normal driving it is considerably cooler above that area now. The surface temp of the wrap is still hot, but is retains the heat, not radiates it. This is hugely important since the TMIC sits directly above the turbo.



Ok so moving on to the actual TMIC itself, what can we do to ward off heatsoak? Try and radiate as much heat away as possible.

So we got some Cool-Tape from DEI. It's an aluminized heat reflecting tape that can handle up to 1500 degrees of radiant heat, not too shabby. The tape itself is very easy to work with, it's pliable and easily cut into whatever shape you need. We decided to wrap every inch of non-flow surface on our Perrin TMIC. It took us a loooong time but this was the result:








The results were dramatic. You can now put your hand on the side of the intercooler that directly faces the turbo/DP area and it is barely warm. The face of the intercooler is actually cool to the touch.

Before this the face of the intercooler was usually warm after normal city driving, and the side facing the turbo was warm-to-hot.

Now we know this method of measuring isn't as good as solid laser temps and internal air temp. measurings with a thermometer. But like I said...were impatient and just wanted to get this stuff installed wihout too much fuss, plus we dont have a thermometer or a tapped hole for one in our TMIC outlet.

We are in love with the Cool-Tape and found a couple other uses. One was to isolate the fender area where our CAI draws air from radiant engine bay heat. The cooler the intakes air, the better. So we decided to cover up the 2 large holes into the fender area, and a few smaller ones, seen here:






Overall shot:



Overall we are very satisfied with our DEI cooling improvements. They have done exactly what we set out to do, minimize engine bay heat and TMIC heat soak. We also made sure our CAI wasn't drawing in hot engine bay air.

Next we will be maximizng airflow to our larger TMIC and making sure our intercooler sprayer system delivers water to the entire surface of the intercooler.

We will then be moving on to increasing our radiators capacity and installing an external oil-cooler. We will also be looking into some vents for our stock hood.

We will be posting up our findings and ideas for you guys to read.

If anyone is interested in any of these DEI items we have a GB thread here: http://forums.nasioc.com/forums/show....php?t=1836432
It has all the specs and heat ratings with pics of the products un-installed.

Feel free to PM us with any questions or pricing on the DEI stuff, Invidia downpipe, APS intake, Perrin intercooler etc. After installing everything we are familiar with it all.


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Old 09-09-2009, 05:14 PM   #2
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Looks good! I've been meaning to do all the necessary wrapping on my recent setup, but I've been lazy.

I need to do the headers, UP, turbo, DP, and cold air side of the FMIC piping. I might try that aluminum tape for the FMIC piping.

Thanks for the write up.
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Old 09-09-2009, 05:27 PM   #3
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Yeah we are going to be wrapping our ported headers and uppipe soon as well. We'll post that up when we get it all done.

When we ran our FMIC we used this:

DEI Cool Tube Cover


It fits over the charge pipe from the intercooler to the throttle body. It's a little easier than using the Cool-Tape and it's a lot thicker. Kept it nice and cool. Unfortunately we don't have any pics of it installed.

We actually put together a couple heat wrap packages for TMIC's and FMIC's. The FMIC includes that Cool Tube Cover.
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Old 09-09-2009, 07:24 PM   #4
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Lol I did this about 2-3 weeks ago, I wrapped my CAI with the tape too, it does everything you said... The face of my AVO tmic is cool to the touch after driving...
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Old 09-09-2009, 07:28 PM   #5
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why not just get a fmic? You can ditch half of that crap you put on.
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Old 09-09-2009, 07:57 PM   #6
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Doesn't weigh sqwat and we have better throttle response than FMIC's...
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Old 09-09-2009, 08:01 PM   #7
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I will try and keep this short:

A FMIC is ideal for maximum intake charge cooling. It is the farthest you can get it from detrimental heat sources and is directly in the air stream. However, Subarus are designed to use a TMIC, so the manifold is pointing the wrong direction for a FMIC setup, so the piping has to be extra long.

So what happens when you step on the throttle and want power? The hot-pipe has to fill up, then the FMIC has to fill up (most are quite large, larger than necessary), then the charge pipe has to fill up, and finally, it reaches the intake manifold.

The result is "transient boost-lag". The biggest place this is felt is once you are in boost, turbo spooling hard and you come off the gas, then get back on the gas again. Nothing......you just vented all your pressurized air back into the intake tract our out into the open. You have to fill allllll that piping and FMIC up again.

I personally don't like this. I had an APS 525 FMIC on my STI, a really nice piece. But the lag was killing me. I decided to switch back to a TMIC and see what I was missing.

I was blown away by the throttle response I had forgotten about. Leaving from a dead stop was smoother. Power delivery was smooth and strong, no dips or huccups. Rev-matching was dramatically improved, so much so I had to learn to give it less gas than I had been with the FMIC. And most of all, coming off the gas, say to lift slighty in a turn, and getting back on the gas.....0 lag. Just instant response and power. Upshifts are more fun too, power is right there for you even short-shifting.

Needless to say, I am a big fan of a TMIC. You might leave a few horsepower on the table due to a slightly hotter intake charge, but I would take the drivability over a few HP any day. This can also be taken care of with a good setup, an intercooler sprayer or even water/meth injection.

Not to mention that a FMIC blocks your radiators airflow, making it less efficient. And your a/c condenser to a lesser extant...

This was longer than I wanted
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Old 09-09-2009, 11:03 PM   #8
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Great write up. I truly believe that heat is a modified cars enemy so keep posting your efforts to fight it.
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Old 09-10-2009, 12:00 PM   #9
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Thanks, we just like sharing what we find to our fellow Suby Enthusiasts
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Old 09-10-2009, 12:49 PM   #10
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You really need a temp probe IN the airflow, when you do things like this... It probably helps, but... who really knows? I'm talking about the tape on the Y pipe into IC. Everything else seems like/for sure it would help, especially the heat wrapped up/down pipes and turbo.
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Old 09-10-2009, 01:24 PM   #11
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Looks nice! Iv been working to lower my intake temps and next will be to keep the IC cooler. I'm running the SPT intake so intake temps are a problem. Or I should say where a problem.

Do you know if that turbo blanket will fit in a TDO4? And will it fit under the stock heat shields?

Thanks.
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Old 09-10-2009, 02:09 PM   #12
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We haven't tried it on something as small as a TD04, but since it has 3 hooks, if you wrapped it around the housing and pulled it tight with the safety wire it should be good to go. As long as it stays on the housing and holds heat in, it does it's job
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Old 09-10-2009, 02:24 PM   #13
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^ Sounds good.

I'm going to be pulling my turbo off soon to replace it with another TDO4 and do an up pipe and P&P work so I will probably add this to the list of things I want.

Would fit a VF turbo better?
I want to get a VF43-48 but price is a bit of a problem for me. More to the point I think people want more then the turbo is worth.

Later.
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Old 09-10-2009, 02:37 PM   #14
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The Ti blanket was designed to fit a T3 housing, it fits a 20g housing *perfectly*, so since the VF housing is larger than the TD housing the blanket would fit the VF more snuggly. It may be a bit loose on the TD housing, so you may have to cinch it down more.
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Old 09-10-2009, 02:47 PM   #15
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Do you think it will fit under the stock turbo heat shield?
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Old 09-10-2009, 03:39 PM   #16
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It *should*, it is a low profile blanket with a tight weave. I am not runing one on my car because there isn't enough room with my large turbo, water line and big TMIC.
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Old 09-10-2009, 05:23 PM   #17
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Well I will be running a stock turbo. TDO4 or VF43-48. Not sure yet. And I have an STI top mount so I'm hopping it will fit.

Thanks.
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Old 09-11-2009, 12:11 PM   #18
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No problem
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Old 09-11-2009, 12:33 PM   #19
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oh look tristans car, say hi to him for me
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Old 09-11-2009, 12:52 PM   #20
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Like the Tmic wrap, does it come in any other colors?

Think the large fender opening idea is nice but at the price of what the wrap costs its not effective enough than the Oem part from Subaru for 2 bux.

https://www.subarugenuineparts.com/p...roducts_id=704

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Old 09-11-2009, 01:14 PM   #21
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Quote:
Originally Posted by Circuit Motorsports View Post
As many of you know heat is your enemy in the engine bay. It heats up your intercooler, engine, hoses, oil and coolant. Everything is connected in some way, and you may not even realize it. A coolant line could be near a heat source, and is inadvertantly being superheated as it passes by. These are things you have to look for when modifying a car and moving things from their stock positions.

We are big advocates of drivability and cooling. So when we recently switched our GDF STi from a FMIC to a TMIC we looked into keeping it as cool as possible in our modfied engine bay.

For reference we are running a FP 20g, with the TD06h housing and 8cm wheel, the biggest 20g out there. We are also using an APS 65mm CAI and a Perrin TMIC.

We decided to tackle the biggest heat generator in the Subaru engine bay, the Turbocharger and downpipe. We went with DEI's new Titanium brand heat wrap and turbo blanket kit (full specs in our FS thread). So far we are very impressed.

The blanket is made completely from the Ti wrap. It is woven together to form a double thick blanket and sewed on the edges to create a nice saddle effect. This makes it fit snuggly over the turbo housing effortlessly. The best part about it's single material construction is that there is no shell stuffed with a fiberglass weave. Therefore there is nothing to seperate and fall apart. It's a solid piece. It also allows for a lower overall profile, so it fits under an IWG actuator arm, no interference whatsoever.

There are 3 metal hooks riveted to the blanket, so you can anchor it to the turbo and downpipe. The blanket fit completely over the hotside housing of our 20g and we secured it with the provided safety wire, it isn't going anywhere.

We then moved on to wrapping our downpipe, we did this prior to installing it in the car. One 2"x50' roll wrapped our Invidia downpipe all the way back to the first hanger bracket, and we had some leftover. It was easily wrapped around the the pipe and secured with the 14" SS locking ties we got form DEI. We used no spray adhesive, we figured securing it tightly with 6 locking ties spaced about 6" apart would be enough. This stuff has a nice slick feel already, so it should have no problem shedding water.

Once the downpipe was mated up we ran the car and let the wrap heat cycle a few times. We noticed that the DP and turbo flanges still gave off a lot of heat, so we used our extra Ti wrap and completely covered up the flanges, securing it on the downpipe with more locking ties.

You can see the difference here:

Unwrapped Flanges



Wrapped Flanges:




Now we are very impatient when it comes to mods, so that leads to be less than scientific. We just like installing stuff, what can we say

However the difference in heat is immediately noticeable. Where before we couldn't even hold our hands over the turbo/DP area after normal driving it is considerably cooler above that area now. The surface temp of the wrap is still hot, but is retains the heat, not radiates it. This is hugely important since the TMIC sits directly above the turbo.



Ok so moving on to the actual TMIC itself, what can we do to ward off heatsoak? Try and radiate as much heat away as possible.

So we got some Cool-Tape from DEI. It's an aluminized heat reflecting tape that can handle up to 1500 degrees of radiant heat, not too shabby. The tape itself is very easy to work with, it's pliable and easily cut into whatever shape you need. We decided to wrap every inch of non-flow surface on our Perrin TMIC. It took us a loooong time but this was the result:








The results were dramatic. You can now put your hand on the side of the intercooler that directly faces the turbo/DP area and it is barely warm. The face of the intercooler is actually cool to the touch.

Before this the face of the intercooler was usually warm after normal city driving, and the side facing the turbo was warm-to-hot.

Now we know this method of measuring isn't as good as solid laser temps and internal air temp. measurings with a thermometer. But like I said...were impatient and just wanted to get this stuff installed wihout too much fuss, plus we dont have a thermometer or a tapped hole for one in our TMIC outlet.

We are in love with the Cool-Tape and found a couple other uses. One was to isolate the fender area where our CAI draws air from radiant engine bay heat. The cooler the intakes air, the better. So we decided to cover up the 2 large holes into the fender area, and a few smaller ones, seen here:






Overall shot:



Overall we are very satisfied with our DEI cooling improvements. They have done exactly what we set out to do, minimize engine bay heat and TMIC heat soak. We also made sure our CAI wasn't drawing in hot engine bay air.

Next we will be maximizng airflow to our larger TMIC and making sure our intercooler sprayer system delivers water to the entire surface of the intercooler.

We will then be moving on to increasing our radiators capacity and installing an external oil-cooler. We will also be looking into some vents for our stock hood.

We will be posting up our findings and ideas for you guys to read.

If anyone is interested in any of these DEI items we have a GB thread here: http://forums.nasioc.com/forums/show....php?t=1836432
It has all the specs and heat ratings with pics of the products un-installed.

Feel free to PM us with any questions or pricing on the DEI stuff, Invidia downpipe, APS intake, Perrin intercooler etc. After installing everything we are familiar with it all.


DEI makes amazing products. I had an indirect sponsorship with them. They make the best products out on the market. There intercooler spraybar is amazing as well. Check them out... Props for consistancy and quality.
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Old 09-11-2009, 02:04 PM   #22
Circuit Motorsports
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^ Yup, DEI makes some nice products. That's for sure



Quote:
Originally Posted by Gamers View Post
Like the Tmic wrap, does it come in any other colors?

Think the large fender opening idea is nice but at the price of what the wrap costs its not effective enough than the Oem part from Subaru for 2 bux.

https://www.subarugenuineparts.com/p...roducts_id=704


The Cool-Tape only comes in the silver color, it's an aluminized tape, so adding a paint or color to it wouldn't work well.

We know about the plastic block off plate, but we didn't have one sitting around and we had some extra cool-tape so we decided to close up all the holes. Plus the tape does a much better job of sealing the hole and reflecting heat than a plastic piece does
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Old 09-11-2009, 03:29 PM   #23
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Quote:
Originally Posted by Circuit Motorsports View Post
I will try and keep this short:

A FMIC is ideal for maximum intake charge cooling. It is the farthest you can get it from detrimental heat sources and is directly in the air stream. However, Subarus are designed to use a TMIC, so the manifold is pointing the wrong direction for a FMIC setup, so the piping has to be extra long.

So what happens when you step on the throttle and want power? The hot-pipe has to fill up, then the FMIC has to fill up (most are quite large, larger than necessary), then the charge pipe has to fill up, and finally, it reaches the intake manifold.

The result is "transient boost-lag". The biggest place this is felt is once you are in boost, turbo spooling hard and you come off the gas, then get back on the gas again. Nothing......you just vented all your pressurized air back into the intake tract our out into the open. You have to fill allllll that piping and FMIC up again.

I personally don't like this. I had an APS 525 FMIC on my STI, a really nice piece. But the lag was killing me. I decided to switch back to a TMIC and see what I was missing.

I was blown away by the throttle response I had forgotten about. Leaving from a dead stop was smoother. Power delivery was smooth and strong, no dips or huccups. Rev-matching was dramatically improved, so much so I had to learn to give it less gas than I had been with the FMIC. And most of all, coming off the gas, say to lift slighty in a turn, and getting back on the gas.....0 lag. Just instant response and power. Upshifts are more fun too, power is right there for you even short-shifting.

Needless to say, I am a big fan of a TMIC. You might leave a few horsepower on the table due to a slightly hotter intake charge, but I would take the drivability over a few HP any day. This can also be taken care of with a good setup, an intercooler sprayer or even water/meth injection.

Not to mention that a FMIC blocks your radiators airflow, making it less efficient. And your a/c condenser to a lesser extant...

This was longer than I wanted
AMEN! You speak the truth my friend! I'm running a fmic and will stick with a tmic on my next Suby. Throttle response and less lag ftw.
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Old 09-11-2009, 05:59 PM   #24
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Since everyone gets wrapped up in numbers, I'll go ahead and ask (because I'm an engineer and like to quantify things) can you make a guesstimate about power gains from your mods?
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Old 09-11-2009, 07:41 PM   #25
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I'm gonna be honest.

I have no idea.



We didn't do any before and after dyno tests.


I will say this though. When I was getting our car tuned on the dyno we didnt use a water sprayer on our IC at all, we had the hood up and a fan blowing on it and that was it. The tuner had the car on the dyno and did many pulls, the last 3 pulls he was fine tuning it. We were edging up on 400hp. We were at like 389, 393, 395....soo close.

So he jumped out of the car, grabed a sprayer bottle and doused the intercooler. Hopped back in did the final pull and Voila! 403 hp. Just by cooling down the IC for a second with a blast of water gave us 8 WHP.

So...by continually keeping the TMIC cooler with heat wrap, shielding and water spray you can *gain* (or keep from losing) a lot of power.

There's also the added benefit of holding the heat into your exhaust manifolds, uppipe and turbo to speed up the exhaust gasses and promote faster spool.

We'll be wrapping our new exhaust manifolds, crosspipe, and uppipe in the next few weeks.

All in all, keeping heat in where it needs to be, and reflecting it from where it doesn't need to be has huge benefits.
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