Cowl induction for cold, ram air for the Si?

[NitrousG35]

I got waylaid again briefly. I discovered a crack in the base of my windshield, no doubt due to the rear end collision. I noticed it while washing my car after getting it back from the body shop.

I took the car in and Honda said they would replace the windshield with a new one. I don't want to cut the metal shelf until the windshield is installed, so that they can't claim the cut had something to do with the crack in the glass.

I went to Sears to buy some special saw blades for cutting metal. I am basically going to do the same thing that Mike_Si_29 did with his cowl induction, although I will use a 9" long BSR scoop set on end, to funnel down to the airbox. I will use a piece of sheetmetal directly above the scoop to deflect any water, again borrowing from Mike_Si_29.

I would highly recommend fabricating an Si airbox cover. I basically cut away most of the top, used ABS plastic sheet to make new sides, front and top, then covered with faux cf vinyl sheet.

My airbox easily accepts an Amsoil cone style filter, which I like because it is a dry filter. I also have a Soxfan143 MAF housing, designed for a race header and cat-back. I also bought an M&M scoop to connect to the factory cold air tube that feeds to the base of the airbox.

Just as the car sits now, it is a beast in VTEC. It pulls incredibly hard, makes a nice sound and has oh so much more driveability. The car has no stumble or balkiness when cold and is much smoother in the lower rpm ranges.

I know that the piece de resistance will be the cowl induction which will draw in rammed air that is cooler and denser.

[mike_si_29]

Great job Bill, cant wait to see your final setup. Maybe i can borrow some of your ideas to improve mine... hahaha. I still remember to make a DIY its just time was an issue. I also bought a K&N hydroshield. I didnt get any water inside the box after water testing... but just incase. I still have to drill a little hole on the bottom of my box as a drain... just to be 110% sure there is no water issues in any kind of situation. Awesome job... keep it up

[Si Speed 317]

Well I just got my Cold-Air intake yesterday from K2Motors and I already had my AEM Bypass valve late last week, I just need to cut the CAI and install the bypass. Should work pretty well. And the reason I went with K2Motors is because it is an easier route to get the same thing as the Injen and cut it up and pay half price, so that is what I did

Install will be tomorrow. I know this is the cowl induction thread, but since I already put in my ideas and contributions, I figured I would help you guys out.


As for the Cowl Ram Air, Bill/Mike's way is the way to go. I believe it will be the same or better than GruppeM intake except for ONE part: Carbon Fiber. I have been speaking with Bill about doing CF and I just might give it a shot. Looks pretty easy to do and it's pretty practical, so we will see where time/money will take me. As for an intake, there are several important factors but the one thing that will make/break an intake is how cold the air is that passes your throttle body. If you can get colder, more dense air to your engine, it will only help. And that is my goal: Getting the coldest/most dense air possible to my engine while maintaining driveability and safety. I will keep everyone updated with my progress and I'll even make a DIY!

[NitrousG35]

Originally Posted by mike_si_29

Great job Bill, cant wait to see your final setup. Maybe i can borrow some of your ideas to improve mine... hahaha. I still remember to make a DIY its just time was an issue. I also bought a K&N hydroshield. I didnt get any water inside the box after water testing... but just incase. I still have to drill a little hole on the bottom of my box as a drain... just to be 110% sure there is no water issues in any kind of situation. Awesome job... keep it up

Mike, what exactly is the K&N Hydroshield? Can you link me to it?

As for borrowing any ideas, to be honest, I have drawn more from you. Since I simply cannot find a scoop/duct that has a 90 elbow in it so that I could draw air from the base of wiper cowl ala Gruppe M, I will use your innovative idea of making a hole in the metal shelf.

Another question, in your thread that you did, you put a small sheet of metal in to deflect water. Where did you attach the sheet of metal? To the metal shelf? Thanks for your help and inspiration.

[Si Speed 317]

^ The Injen hydroshield is a mesh type material that goes over your filter, here's a picture of it. If you look close enough, you'll see the filter. I'll imagine the K&N is practically the same.



And the metal shelf is this part circled here:

[NitrousG35]

Originally Posted by Si Speed 317

Well I just got my Cold-Air intake yesterday from K2Motors and I already had my AEM Bypass valve late last week, I just need to cut the CAI and install the bypass. Should work pretty well. And the reason I went with K2Motors is because it is an easier route to get the same thing as the Injen and cut it up and pay half price, so that is what I did

Install will be tomorrow. I know this is the cowl induction thread, but since I already put in my ideas and contributions, I figured I would help you guys out.


As for the Cowl Ram Air, Bill/Mike's way is the way to go. I believe it will be the same or better than GruppeM intake except for ONE part: Carbon Fiber. I have been speaking with Bill about doing CF and I just might give it a shot. Looks pretty easy to do and it's pretty practical, so we will see where time/money will take me. As for an intake, there are several important factors but the one thing that will make/break an intake is how cold the air is that passes your throttle body. If you can get colder, more dense air to your engine, it will only help. And that is my goal: Getting the coldest/most dense air possible to my engine while maintaining driveability and safety. I will keep everyone updated with my progress and I'll even make a DIY!

Dan, I watched the video you linked me to. I am quite intrigued by the different ways to use cf. I think that I could learn to do the cf overlay. What would be a major project is to construct a mold first, then use layers of cf and finally vacuum bag it. I think a person would have a lot of money invested in designing something from scratch.

What I could see as an alternative is to cut away most of an Si cover, then build a skeleton out of plastic tubing. The skeleton could then be overlayed with cf cloth. You would then have a very rigid and good looking airbox cover.

Keep us posted on your project. I wish there was a way for you, Mike_Si_29, Soxfan143 and myself to work together on a system. We could come up with some pretty cool stuff I think. Backyard intakes FTW!

[k20z3 Koop]

Originally Posted by Si Speed 317

Well I just got my Cold-Air intake yesterday from K2Motors and I already had my AEM Bypass valve late last week, I just need to cut the CAI and install the bypass. Should work pretty well. And the reason I went with K2Motors is because it is an easier route to get the same thing as the Injen and cut it up and pay half price, so that is what I did

Install will be tomorrow. I know this is the cowl induction thread, but since I already put in my ideas and contributions, I figured I would help you guys out.


As for the Cowl Ram Air, Bill/Mike's way is the way to go. I believe it will be the same or better than GruppeM intake except for ONE part: Carbon Fiber. I have been speaking with Bill about doing CF and I just might give it a shot. Looks pretty easy to do and it's pretty practical, so we will see where time/money will take me. As for an intake, there are several important factors but the one thing that will make/break an intake is how cold the air is that passes your throttle body. If you can get colder, more dense air to your engine, it will only help. And that is my goal: Getting the coldest/most dense air possible to my engine while maintaining driveability and safety. I will keep everyone updated with my progress and I'll even make a DIY!

Hey Man, make sure you put the bypass valve before the MAF sensor. I'm almost positive you'll have issues if you put it post MAF.

[NitrousG35]

Originally Posted by Si Speed 317

^ The Injen hydroshield is a mesh type material that goes over your filter, here's a picture of it. If you look close enough, you'll see the filter. I'll imagine the K&N is practically the same.

Thanks Dan. I went to Injen and found some info on it. Apparently, it has a hydrophobic material, which repels water. It is water repellent, but not waterproof. However, it would give an extra measure of safety.

[mattsbobo]

Bill, I just found out about this:MINI Cooper DDM Works R56 Intake

Obviously it's for a Cooper S, it's really expensive, and I don't know how we could make it work for the Si, but I thought I'd throw it into the mix.

Edit: Just found these scoops as well : Welcome to S-Factor..: MCS Upgrades: Intake Cowl (once again, for the Mini), but one of them might tie in well to what you, and Mike are doing with your intakes (assuming you can incorporate it into the Si cowl. Once you click the link, just scroll down a little. You'll see what I'm talking about.

[mike_si_29]

Nice find, that box looks clean. Bill, the metal sheet is attached by 1 screw , all the way on the back of the shelf. I also put a foam self glueing tape between shelf and metal sheet so it wont vibrate too much. I will put everything together today or tomorrow and make some pictures so you guys can see. One of my friends knows how to work with carbon fiber but i dont know how good he is. Maybe i will try to make that box out of carbon fiber eventually.

[20strong]

Hey Bill, I was thinking about using a a 9 inch rectangle box a 3 inch tube and fabricating a acrylic box around my Injen SRI. All acrylic of course... I cant wait to get home on leave I have so much to contribute to this but it all has to be fabricated. lol . I should beable to get it all made up in a few days though Aug 22 cant come any sooner.

[NitrousG35]

^ Marcus, it is actually quite easy to fabricate your own airbox. I used ABS sheet plastic, similar to mil spec of the stock cover. I left just a small part of the cover intact, close to where the inlet tube/hole is.

I made new sides, a new top, a new front and a new back piece. I used an automotive adhesive to make the initial contact, then when it dried, I laid fiberglass on the inside and poured the resin in and made sure every seam was adequately covered. When done, it was very rigid and strong.

I would recommend using the Si aircover as a template, but I don't know how large the Injen filter is. The Amsoil cone filter fit beautifully. I would highly recommend getting a Soxfan MAF housing as it made a huge difference in performance.

Once you enclose your filter, you have the option of directing cold air in from the cowl or from the front of the car. I am actually using both.

To beautify your airbox, you can get thin ABS laminate to overlay the airbox, then cover it with faux cf vinyl sheet. At a meet we had on Sunday, one guy asked me if my airbox was made out of cf, which I took as a compliment.

[NitrousG35]

Originally Posted by mike_si_29

Nice find, that box looks clean. Bill, the metal sheet is attached by 1 screw , all the way on the back of the shelf. I also put a foam self glueing tape between shelf and metal sheet so it wont vibrate too much. I will put everything together today or tomorrow and make some pictures so you guys can see. One of my friends knows how to work with carbon fiber but i dont know how good he is. Maybe i will try to make that box out of carbon fiber eventually.

Thanks Mike. I think I will do essentially the same that you did on yours. The only difference is that I will use a larger duct-my BSR scoop, in the metal shelf. It narrows down, so I will connect that part to the airbox cover.

[SiBEAR]

Originally Posted by mattsbobo

Bill, I just found out about this:MINI Cooper DDM Works R56 Intake

Obviously it's for a Cooper S, it's really expensive, and I don't know how we could make it work for the Si, but I thought I'd throw it into the mix.

Edit: Just found these scoops as well : Welcome to S-Factor..: MCS Upgrades: Intake Cowl (once again, for the Mini), but one of them might tie in well to what you, and Mike are doing with your intakes (assuming you can incorporate it into the Si cowl. Once you click the link, just scroll down a little. You'll see what I'm talking about.

What a great find.. I really like the way that CF intake cowl looks...I wouldn't be surprised it if fit our cars perfectly.

[20strong]

Great info Bill. Thanks

I have a Apexi filter on my Injen at the moment.

[NitrousG35]

Originally Posted by mattsbobo

Bill, I just found out about this:MINI Cooper DDM Works R56 Intake

Obviously it's for a Cooper S, it's really expensive, and I don't know how we could make it work for the Si, but I thought I'd throw it into the mix.

Edit: Just found these scoops as well : Welcome to S-Factor..: MCS Upgrades: Intake Cowl (once again, for the Mini), but one of them might tie in well to what you, and Mike are doing with your intakes (assuming you can incorporate it into the Si cowl. Once you click the link, just scroll down a little. You'll see what I'm talking about.

Thanks Matt. Very interesting setup. Seems like others have been working on this idea all the while we have been discussing it. The implementation of this system is actually quite similar to that of Mike_Si_29. The good thing is that the concept of cowl induction is now a well established fact, not only for classic musclecars, but for fwd cars as well. I just wish there was a cheaper alternative to Gruppe M for our cars.

I am going to try and learn how to work with cf. I am going to see if I can find any classes where I live that offers instruction in how to work with it. Otherwise, I may just buy a small amount of cloth and resin and try it myself. I know how to fiberglass, so hopefully, that knowledge will be applicable to cf as well.

[Si Speed 317]

Originally Posted by k20z3 Koop

Hey Man, make sure you put the bypass valve before the MAF sensor. I'm almost positive you'll have issues if you put it post MAF.

Of course, it goes between the filter and the MAF sensor. Thanks for the lookout

Originally Posted by NitrousG35

Thanks Dan. I went to Injen and found some info on it. Apparently, it has a hydrophobic material, which repels water. It is water repellent, but not waterproof. However, it would give an extra measure of safety.

You can never be too safe

Originally Posted by NitrousG35

Thanks Matt. Very interesting setup. Seems like others have been working on this idea all the while we have been discussing it. The implementation of this system is actually quite similar to that of Mike_Si_29. The good thing is that the concept of cowl induction is now a well established fact, not only for classic musclecars, but for fwd cars as well. I just wish there was a cheaper alternative to Gruppe M for our cars.

I am going to try and learn how to work with cf. I am going to see if I can find any classes where I live that offers instruction in how to work with it. Otherwise, I may just buy a small amount of cloth and resin and try it myself. I know how to fiberglass, so hopefully, that knowledge will be applicable to cf as well.

Give it a shot with the small pieve of cloth and resin, see where that takes you and then you'll know your next step. Remember, the internet is your friend in situations like this

[ataraxiaone]

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