Cowl induction for cold, ram air for the Si?

[Excalibur]

Originally Posted by .jrmyrmx

yeah it does look a bit goofy, i definably wouldnt do it to my car. ive read some stuff saying you can decrease your engine temp by half just by by doing the hood tilt thing.

Hood Tilt - D-series.org

your idea sounds really good though, i cant wait to see how it works.

Would be good maybe on track day in the 1/4 mile or something. ?

[NitrousG35]

Originally Posted by mike_si_29

Hey man ... e-hug works for me .. hahah . We are all here for the same reason, try to improve our cars. I was thinking to build airbox too. I was just thinking, what would be better : airbox or that cone around filter???? Which one will give better airflow ??? If cone is better, then we need to find some flexible plastic or something to build it with.

I'll go one step further: A cone filter with an airbox. You can't have cowl induction without an enclosed air induction box. There has to be a vacuum drawing in the cold air in. In addition, the rammed air has to be directed towards the filter. Without an airbox, the air would go nowhere.

I have found a number of places to get a duct for the firewall. I have also found flexible tubing to connect the duct to the airbox. The greatest challenge facing us now is the creation of the airbox. Once that is solved, we are on our way.

[mike_si_29]

I found a lot of nice looking custom made air boxes made from aluminium covered with heat wrap. I saw you or somebody wanted to use acrlylic sheets. Aluminium or stainless steal look awesome but the have a really really high heat transfer coefficient. Acrylic is really good as good as polypropylene ( i dont remember coefficients but itwas close). I was thinking to go to local store and get Poly Cutting Boards and make one. Its really easy to cut and you can use screws to put it together. To make it sealed, we can use aluminium corners outside and glue them with sealant all around edges. Thats is my plan. Let me know if you have anything better in mind. I know we can make it cheap, we just have to find cheapest way to make it. Cheers... its friday night, so bbq is going on. I will check it back in a few. This tread is awesome.

[NitrousG35]

Originally Posted by mike_si_29

I found a lot of nice looking custom made air boxes made from aluminium covered with heat wrap. I saw you or somebody wanted to use acrlylic sheets. Aluminium or stainless steal look awesome but the have a really really high heat transfer coefficient. Acrylic is really good as good as polypropylene ( i dont remember coefficients but itwas close). I was thinking to go to local store and get Poly Cutting Boards and make one. Its really easy to cut and you can use screws to put it together. To make it sealed, we can use aluminium corners outside and glue them with sealant all around edges. Thats is my plan. Let me know if you have anything better in mind. I know we can make it cheap, we just have to find cheapest way to make it. Cheers... its friday night, so bbq is going on. I will check it back in a few. This tread is awesome.

Mike, I found a company that sells airboxes made out of the kind of plastic used in the factory setup. I am trying to get dimensions on the boxes they have.

[mike_si_29]

Its sounds awesome. I also thought about going to junkyard next week and look at the cars. If we get right dementions and big enough to place Apexi filter there, we can probably modify it and use it. I will probably have a chance to remove a cowl and measure all avalable space by Monday night. I might as well take some pictures to make it easier to come up with a plan. I think our main concern is to find a water free place in a firewall with a fresh air. I am not home right now, so i cant go to garage and open all the stuff up. I BET there is one we can use.

[HondaFREAK]

..isn't the firewall like 8in back from the base of the windshield?

[NitrousG35]

Originally Posted by mike_si_29

Its sounds awesome. I also thought about going to junkyard next week and look at the cars. If we get right dementions and big enough to place Apexi filter there, we can probably modify it and use it. I will probably have a chance to remove a cowl and measure all avalable space by Monday night. I might as well take some pictures to make it easier to come up with a plan. I think our main concern is to find a water free place in a firewall with a fresh air. I am not home right now, so i cant go to garage and open all the stuff up. I BET there is one we can use.

If a guy could just go to a junkyard and take a tape measurer with, you could go through different cars until something close to what we want is found. It could be modified after that if necessary.

[NitrousG35]

Originally Posted by HondaFREAK

..isn't the firewall like 8in back from the base of the windshield?

I am talking about the sheetmetal directly behind the motor.

[20strong]

Originally Posted by Sirbelch

What if there is a curved area in the box? How do you calculate the volume of a sphear?

Dont make it with any curved areas if you cant caculate the volume of a sphere. But here is the equation if you would like to use a sphere shape. 4/3 Pi r3

Originally Posted by 20strong

I wish I was home I cant do shit from here. Geta large piece of styrofoam and shape it to fit in the area we have available. Then make sure that there is enough volume (should be fairly simple mathmatics here) for the filter and airspace. Use cheap crap that you can easily manipulate to start, I mean you can get foam at hoam depot and cut it with a cheese cutter for crap sake.

Did anyone but this guy read this. It isnt expensive to do this, in fact coming up with the box itself should be super easy. Especially if your interested in acrylic. Once the box is initially assembled with acrylis it is a simple matter of removing the screws and placing a little apoxy between the pieces. Leaving one side to open for filter changes. Use a piece of foam sealant tape in say 1/4 width to seal the opening side of the box. I wish I was at home cause I really want to construct this box now.

[HondaFREAK]

ah, i see..I was confused since the OP said the firewall would be a good place, but i see where you're going with this...seems like sound engineering...good luck man, anything that makes more power is always a plus

[Zeuceone]

I got a whole different set in mind that im going to use. Its gonna take a few different parts but will like nothing you would see on the civic.

[mike_si_29]

Yeah... Thats what i was thinking to do... With Xintake it would be a bit harder but i think its worth of try. Maybe after i remove cowl and see how much area we have, i can go and look around junkyard on tuesday or wednesday. Even if i cant find anything, we can alsways make one. All i worry about now, is there actual a water free spot in a firewall that we can drill a 3" hole. Guess we will see. By the way...whats your name Nitrous?

[NitrousG35]

Originally Posted by mike_si_29

Yeah... Thats what i was thinking to do... With Xintake it would be a bit harder but i think its worth of try. Maybe after i remove cowl and see how much area we have, i can go and look around junkyard on tuesday or wednesday. Even if i cant find anything, we can alsways make one. All i worry about now, is there actual a water free spot in a firewall that we can drill a 3" hole. Guess we will see. By the way...whats your name Nitrous?

One of the guys took the black plastic off in the cowl area. He said there is an open area between the sheetmetal in the back of the engine bay and the area of the passenger compartment. It goes to the floor. Water would not be a problem as a duct would not directly be in the way of any water. Kind of hard to explain w/o actually looking at the area.

BTW, name is Bill!

[NitrousG35]

Originally Posted by soxfan143

I installed my header yesterday and had the cowl completely apart. There is a veritable canyon of space under there when you remove that plastic cowl and that metal shelf that supports the strut towers and the windshield. If we cut out a section of that shelf, that is large enough to afford some material being removed, we could modify the plastic cowl and fabricate something like Nitrous is talking about. Or get some company to copy the Gruppe M design. Which unfortunately is EXACTLY what we're looking for, but is only affordable for A-Rod or Bill Gates. Lol. But if we could just find someone that could mold something out of CF to go around the filter and up into the cowl area we would be all set. If I was any good at fiberglass I would try that but I suck at it. lol.

This is the post I am referring to.

[HondaFREAK]

Originally Posted by NitrousG35

This is the post I am referring to.

I see...that sounds like a pretty good idea.

Sub'd to see what you come up with!

[mike_si_29]

I just talked to my dad and i asked him about what would be the best way to build airbox. He said one of his co-workers actually makes any plastic forms in his garage and he has a little company on a side of his primary job. Maybe i can talk to him and give him an idea what we are looking for. All he is woring is plastic so he must know what it would cost. Plus we can give him location of air intake and Xintake intake outlets... hahha. Might be cheap...but you never know. Its his side job, so it cant be too expansive. My dad said he can mold pretty much anything, I will just have to talk to him.... and let you know

[mike_si_29]

Aslo, i really like an idea of getting air through fog light inlet. But i think over the time air filter is gonna get really dirty quick even if we use mesh on inlet. What do you think?

[NitrousG35]

Originally Posted by mike_si_29

Aslo, i really like an idea of getting air through fog light inlet. But i think over the time air filter is gonna get really dirty quick even if we use mesh on inlet. What do you think?

You are absolutely right Mike. The front bumper inlet near the foglight is dirty on two accounts:

First, the air aerodynamically is more turbulent and the air is uncontrolled. Note racecars running in a tow or slipstream rather than running alone.

Second, the air is physically dirtier as an intake there will ingest more road dust and contaminants.

The air at the base of the cowl is cleaner for the same reasons:

First, because the air is moved over the front and the hood, the air is in a state of laminar flow, meaning the air is controlled and attached to a surface. Once that air hits the cowl, which is a high pressure zone, the air can be redirected into an intake.

Second, because the cowl is physically away from the street, it is less likely to ingest dust, dirt and contaminants. Take note of the fact that auto manufacturers place the intake for their ventilation in this area. They never place ducts at the front of the car because dirty air could come into the cabin.

I just wish we could assemble a team of people like yourself and work together for a few days to get this hammered out. As I have said many times, once the airbox is constructed for a cone filter, the rest is relatively simple.

[mattsbobo]

This may sound retarded, and maybe I haven't read correctly, but for you guys talking about using acrylic for a box: Once you glue the box so it's sealed or whatever, how are you going to be able to open it back up?