TURBO COLD air intake

[jdmawd]

I think its pretty much common knowledge that cold air offers cooler charged air temps, better timing advance and less chance of pre-ignition detonation. To even entertain a discussion that thinks other wise is silly.

 

[DCJ98GST]

95GSXracer,

Good post, that illustrates that it is only a real benifit during the winter.

One thing that you may have overlooked is that even though the temperatures at the manifold only go down 7 to 30 deg (depending on outside temperature) your intercooler will be a lot more resilient to heat soak.

Another thing, that I may try when I get a FMIC is to create a true ram air. Basically this would use the same duct that you have shown but also encapsulate the air filter in a air tight box. This will allow pressure to build up in the box and around the filter when you are going fast. This should help spool the turbo and keep the turbo more efficient. By essentially forcing the air into the filter pipe, the turbo does not have to pull the air throught the filter an MAS. It may be the same kind of gain as you felt when cutting the BOV dump tube.

Here is a link that is simillar:

http://www.autospeed.com/cms/article.html?&A=0629

 

[Vinnie]

I don't get it!!!!!!!!!

Isn't that Air Damn more like an Air restrictor????

Think about, by covering your open air filter with an Air Damn , is like having a stock intake all closed up.

Makes sense????

Hell ya. Unless you have numbers to show me that an Air Damn works, in my opinion is like having a stock intake.

I made one of those, went to the track, I was losing .2-.3 seconds on the 1/4 mile. took it out got back my .3 seconds.

I kept doing that all day putting in taking it out, always got the same results.

 

[DCJ98GST]

Uh, the stock intake sucks

It has a little pipe that snakes up in the wheel well somewhere. The stock system still has to PULL the air through the little pipe and through the air non-conical filter. How is that piece of crap similar to what we are talking about!

What I am talking about is taking the whole opening for the side mount intercooler and ducting it up to a cone type filter, that is enclosed so that all that high pressure in front of your car is trapped in the enclosure. This will put high pressure around the filter an force cold air into it. GET IT? PUSH AIR INTO THE FILTER.

 

[GSX1G]

Originally posted by DCJ98GST
Uh, the stock intake sucks

It has a little pipe that snakes up in the wheel well somewhere. The stock system still has to PULL the air through the little pipe and through the air non-conical filter. How is that piece of crap similar to what we are talking about!

What I am talking about is taking the whole opening for the side mount intercooler and ducting it up to a cone type filter, that is enclosed so that all that high pressure in front of your car is trapped in the enclosure. This will put high pressure around the filter an force cold air into it. GET IT? PUSH AIR INTO THE FILTER.

So are you talking about basicly a ram-air type setup?

 

[InferiorWang]

Originally posted by GSX1G


So are you talking about basicly a ram-air type setup?

some thing like that. not everybody goes as far as to run a tube down to the front but you want to have it set up where it can still draw in air, just not all that hot engine air.

 

[fusion_ta66]

The only thing that a heat shield will accomplish is slightly lowering intake air temps. Putting a piece of metal in between the filter and the engine bay does not force air into the filter. Sorry.

 

[King Salami]

I made this one for my 1G.
http://www.vfaq.com/mods/1G_cold_air_box.html

You could use the same steps, but different templates for your 2G.

 

[sdees2002]

Originally posted by fusion_ta66


If you honestly believe that a heat shield is going to make your turbo pull approximately 15% more air, then I got some land to sell you. Get your head on your shoulders man! Why would a piece of metal surrounding the air filter increase flow? If anything, it would restrict overall airflow!

This mod can't hurt, and is cheap. It is maybe worth it for the money. It probably helps out a little bit, but by no means should anyone expect any noticible power increase, because you simply won't get it. Don't believe everything you read.

Why would I lie or exaggerate? I'm not selling the intake shield. Personally, I couldn't care less wether any of you go out and buy one or not, I'm just telling you about my experience. When I put my cold air intake shield on, I wasn't expecting to feel a difference, but I did. I'm not the only one who has bought one and felt a difference either. Some people make them out of foam which I think is pointless, because the hot air from the engine can pass through the foam somewhat. My cold air shield is metal. It works good. I FELT a difference, a pretty noticeble one for a $35 dollar mod. Believe what you want. My karma would peak at about 1450 before the mod with the 14b, 1650 afterwards. How does that make sense? If the hot air from the engine is blocked, and outside (cooler) air is getting to the filter area (which it does from the hole in the inner fender well), the air in the filter area will be more dense. If it is more dense, then there is MORE air to suck in. When something is more dense, that means there is more of it in the same given area. We all know that the colder the air is, (the colder any molecule is for that matter), the denser it is. If you still dont belive, spend the $35 bucks for the metal one and give it a try. You even said yourself that it couldn't hurt...

http://www.getboost.com/ray/Web Pages/2gintake.htm

 

[Kevin Jewer]

I agree that the cold air intake has SOME benefit, but like I said in my original post its not much, especially with a good FMIC. The karmen reading on the AFC is not reading air mass, only speed. So the cooler temp shouldnt make it rise. In fact on a colder day, you Hz reading is typically lower. But the increased density will help, as will the cooler temps as far as knock goes, but its a very slight gain.

Something that DID seriously increase airflow though was the 3" ABS intake I made. I saw a consistent 60-80 hz improvement around 1800 hz, on the 14b/16g. That does alot to lower vacuum before the turbo. I still have to read that "eliminating negative boost" article (thanks for the link ) but its along the same line of thought. A turbo is a pressure multiplier. More pressure (less vacuum) at the inlet equals more pressure at the outlet. Or in our case where boost is regulated, lower compressor speeds resulting in increased efficiency. But like boost leaks, the smaller the turbo the bigger the gains. Larger turbos dont respond as well to these types of tactics. But if your turbo (like mine) has a 3" inlet, you dont have much choice but to run a 3" intake anyway

 

[sdees2002]

Why would a piece of metal surrounding the air filter increase flow? If anything, it would restrict overall airflow

Read the link...
http://www.getboost.com/ray/Web Pages/2gintake.htm

 

[fusion_ta66]

Please don't link to such worthless, unscientific drivel again. Completely and totally wrong. Karmen values will NOT increase from a heat shield. See 95GSXracer's post above.

What in the hell do you think the person who is selling the product is going to say? Check out my post about the oceanfront property.

 

[jdmawd]

cat

 

[sdees2002]

DSM - making people technical gurus since 1989

 

[96AWDTSI]

I still can't say how much my mod will help, because I still haven't driven my car with all the &%$* snow, but keeping the hot engine air out(more or less), & bringing in fresh air, should be worthwhile.
www.members.aol.com/rrm707/ram

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[greyforestgst]

Originally posted by 96AWDTSI
headlight cai

nice!
i like mine more. doesnt work for sidemounters though.

 

[greyforestgst]

right to here.

it does work. when i take off the k&n, the bottom side of it is dirty as crap from all the air being pushed in from outside.

 

[Turboniam]

I have pics of the "Ram Air" mod I did on my 1g with pop up headlights.

I'll have to get a link to it. The basic gist of the mod:

Above the passenger headlight I installed a small scoop, gutted out as much as possible while retaining working pop up lights, and was able to go around the obstruction i.e. the headlight in order to get "cooler air" to the filter.

To acompany this mod, I also have a "box style" block off plate that seals the filter off from the engine bay.

Also, I put a cylinder block off plate around the top of the filter to help seal the filter from the engine heat/bay even more.

The next step is to make a port of entry "ram air" mod similar to greyforrestgst's mod... this way I will have fresh air coming from the top via the scoop, the bottom via some type of scoop/hose/whatever AND the rest of the filter will be sealed off as best as possible from the engine bay.

Texas heat is a killer, so this stuff is important

Also, I will soon be installing an extractor vent to help release the heat from the engine bay. Basically it is a WRX scoop turned backwards.