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Old 05-27-2011, 04:14 PM   #1
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heat shields, do they actually work ?!

do heat shields actually make a difference on short ram intakes?
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Old 05-27-2011, 04:14 PM   #2
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Nope. All you're really doing on sri is sucking up the hot air.
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Old 05-27-2011, 04:55 PM   #3
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it won't affect the air temperature but it will deflect any direct radiation heat coming off of the exhaust header away from the filter.
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Old 05-28-2011, 02:51 AM   #4
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Nope. All you're really doing on sri is sucking up the hot air.
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Old 06-01-2011, 11:30 AM   #5
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Heat shields DO block SOME heat from reaching your SRI, but you will always have more heat entering the intake with an SRI compared to a CAI which is routed away from the engine bay. I would use a heat shield plus wrap the intake tube with heat wrap if you are that anal about heat.
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Old 06-01-2011, 12:20 PM   #6
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Heat shields DO block SOME heat from reaching your SRI, but you will always have more heat entering the intake with an SRI compared to a CAI which is routed away from the engine bay. I would use a heat shield plus wrap the intake tube with heat wrap if you are that anal about heat.
Might as well wrap the filter in heat wrap too, because that's where the heat gets sucked in from.
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Old 06-01-2011, 12:26 PM   #7
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Might as well wrap the filter in heat wrap too, because that's where the heat gets sucked in from.
This is true. Really it's not going to matter if you wrap the tube or not. I was just saying if he is that anal about soaking up heat, wrap it. DON'T WRAP THE FILTER THOUGH! lol
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Old 06-01-2011, 02:25 PM   #8
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Any blocked heat is still blocked heat... Any reduction is something... Dropping your intake temps 10 degrees makes a difference... So if you can build a good shield, and wrap the metal intake tube to prevent heat soak, you WILL make a difference... Alot? Probably not.. Also depends on your driving... More important on a road race car where it gets driven hard for longer periods of time...
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Old 06-01-2011, 02:37 PM   #9
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Price vs. Power Difference = fucking retarded to heat wrap your short ram. the air doesn't remain inside the intake long enough for heat wrap to effect the IAT's.
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Old 06-02-2011, 08:10 AM   #10
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Originally Posted by wketchin View Post
Price vs. Power Difference = fucking retarded to heat wrap your short ram. the air doesn't remain inside the intake long enough for heat wrap to effect the IAT's.
Then why do they make phenolic spacers? To cool the intake manifold by separating it from the motor, therefore reducing its heat... The intake is nothing more than an extension of the intake manifold..

The air moves just as fast through the manifold as it does the intake...

The same reason that people thermal coat their intake & exhaust manifolds...

To keep the air temps inside of the item inside, and the air temps outside the item outside..
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Old 06-02-2011, 09:36 AM   #11
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1.) Phenolic spacers only work when you are not inhaling heated engine bay air.

2.) Nobody thermal-coats an intake manifold. At least nobody who cares about performance.

3.) Exhaust manifolds and turbines are coated to reduce radiant heat. Radiant heat is not as big a factor for short ram intakes as the fact that, as mentioned many, many times already, you are breathing in heated engine bay air.

Your logic is flawed. Don't really know what else to say about it.
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Old 06-02-2011, 10:54 AM   #12
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Originally Posted by el78704 View Post
1.) Phenolic spacers only work when you are not inhaling heated engine bay air.

2.) Nobody thermal-coats an intake manifold. At least nobody who cares about performance.

3.) Exhaust manifolds and turbines are coated to reduce radiant heat. Radiant heat is not as big a factor for short ram intakes as the fact that, as mentioned many, many times already, you are breathing in heated engine bay air.

Your logic is flawed. Don't really know what else to say about it.
1. Seriously?? Explain... Because last I knew, reducing from 130 degrees to 110 degrees is about the same thing as reducing from 110 degrees to 90 degrees..

2. Really?? Tell that to Subaru, who coats the manifolds on all STis to keep temps down some.. Also tell that to Hondata, who says to thermal coat the inside of the intake manifold to get better gains..

3. ) Thats right. They are coated to reduce radiant heat. To keep the hot air in the tubes... Exactly what I said... To keep the hot air in the pipes and moving... And as it keeps hot air in the pipes, it will also keep hot air OUT of pipes... So therefore, shielding the intake filter to prevent radiant heat, along with coating of the pipes/manifolds WILL help.
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Old 06-02-2011, 12:47 PM   #13
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Originally Posted by nperkins View Post
1. Seriously?? Explain... Because last I knew, reducing from 130 degrees to 110 degrees is about the same thing as reducing from 110 degrees to 90 degrees..

2. Really?? Tell that to Subaru, who coats the manifolds on all STis to keep temps down some.. Also tell that to Hondata, who says to thermal coat the inside of the intake manifold to get better gains..

3. ) Thats right. They are coated to reduce radiant heat. To keep the hot air in the tubes... Exactly what I said... To keep the hot air in the pipes and moving... And as it keeps hot air in the pipes, it will also keep hot air OUT of pipes... So therefore, shielding the intake filter to prevent radiant heat, along with coating of the pipes/manifolds WILL help.
1) I thought the phenolic material separated your metal intake manifold from the metal head, thus preventing heat soak from the head (one of the hottest locations on the engine)

2) I will tell that to subaru, that all their engineering is equivalent to a honda driver coating their short ram intake with exhaust wrap.

3)Why would you keep hot air in, and hot air out? What does this have to do with sucking in hot radiant air through the filter?
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Old 06-02-2011, 12:49 PM   #14
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btw.. this is like arguing which retard with a bum leg will win the special Olympics.
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Old 06-03-2011, 12:43 PM   #15
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Quote:
Originally Posted by wketchin View Post
1) I thought the phenolic material separated your metal intake manifold from the metal head, thus preventing heat soak from the head (one of the hottest locations on the engine)

2) I will tell that to subaru, that all their engineering is equivalent to a honda driver coating their short ram intake with exhaust wrap.

3)Why would you keep hot air in, and hot air out? What does this have to do with sucking in hot radiant air through the filter?
Here we go...

1. Thats right. It separates the metals to prevent the manifold from heat soaking, thus preventing the air passing through it from heating up. Think of your heater for your AC system.. How fast is that air moving? How fast does it heat up? Same principal.

2. You should tell that to Honda's F1 team then too... They must make their intakes out of carbon fiber for its bling factor, not its thermal factors..

3. Because if you keep what's in in, and what's out out, then they can't change one another.. Here's a non car example..


Thermal coatings on exhausts/manifolds help to keep the heat in the pipes, preventing the pipe from radiating heat and causing the engine bay to heat up.. The same principal applies to an intake manifold/pipe... If you can insulate it to prevent the heat from the engine bay from making the outside of the part hotter, you will be keeping the inside of the part (And the air passing through it) cooler..

NOW... I understand what you mean that the filter can still suck in the hot air... Which is why I was saying if you had a good shield/box, then you are keeping that hot engine bay air away from the filter, and therefore the engine.
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Old 06-03-2011, 01:00 PM   #16
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nperkins, since you are so insistent on being right, here is what you should do:

1.) Replace your Honda IAT sensor with a GM "open"-style unit. They are abundant and cheap. Can't use the Honda unit here, since it doesn't read fast enough.

2.) Datalog a mix of freeway and stop-and-go city driving, then note the IAT's of your wrapped (or whatever...) short ram.

3.) Then, make a jumper and hang the IAT sensor down in the fenderwell, where the CAI element normally sits and record the same mix of driving.

I already know what the results will be but in case I am wrong, you can be the first in line to tell me that. Remember, I'm not the one with anything to prove, since every manufacturer pulls intake air from outside the engine bay with their OEM airboxes.
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Old 06-03-2011, 10:03 PM   #17
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rip it off and either put heatwrap or aftermarket header
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Old 06-04-2011, 12:36 AM   #18
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oh my god.

the temperature change from wrapping a sri would be so minimal. it would make an unnoticeable amount of difference.

heat shields wont do much once your engine is a normal temperature.
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Old 06-04-2011, 12:50 AM   #19
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Buy CAI.

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I don't know why manufacturers make SRI's where the filter is 2 inches away from the header. You'd have a much more efficient SRI if the filter was towards the edge of the bay (like behind the headlight).
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Old 06-04-2011, 12:02 PM   #20
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Quote:
Originally Posted by el78704 View Post
nperkins, since you are so insistent on being right, here is what you should do:

1.) Replace your Honda IAT sensor with a GM "open"-style unit. They are abundant and cheap. Can't use the Honda unit here, since it doesn't read fast enough.

2.) Datalog a mix of freeway and stop-and-go city driving, then note the IAT's of your wrapped (or whatever...) short ram.

3.) Then, make a jumper and hang the IAT sensor down in the fenderwell, where the CAI element normally sits and record the same mix of driving.

I already know what the results will be but in case I am wrong, you can be the first in line to tell me that. Remember, I'm not the one with anything to prove, since every manufacturer pulls intake air from outside the engine bay with their OEM airboxes.
A friend I actually did testings using thermocouples about 9-10 years ago when we were still big into hondas... We tested AEM CAIs, Iceman Intakes (It was that long ago), DC Sports, HondaSports, and a few others.. And while YES, a CAI would typically have colder IATS than a short ram (Even a wrapped one), THAT IS NOT WHAT THE OP ASKED.. He asked if a shield/wrap would make a difference on a SRI, and the answer is YES IT WILL. It was only 10 years ago, and on an EM1 chassis, but I actually recall an ARC style airbox having the lowest IATs of any of the intakes we tested... And I also recall the iceman giving better IAT's because it was plastic, not metal, so it didn't absorb the heat (But didn't make as much power because of its design)..

And how would measuring air inside an intake in the engine bay in one setup, and in a fenderwell on another test be anywhere near accurate? You have eliminating the soak of the pipe, regardless of if its an SRI or CAI..
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