I just wanted to post my little project of last week. i decided to make a CAI for my GTUs. Here are the pics:
Making the template out of poster board:

Aluminum box bent up and all together:

MAF/box bracket make and installed:



The project as of now:




Gonna add another peice of weather stripping where the box and the inner wheel well meet. Also gonna pull the box out and paint it and the other bracket that i made to hold the MAF in place. Let me know what you guys think.

Izzy

 

Nice .

 

Thanks

 

Very clean looking. You going to paint it at all and is there any reason your kept the orginal intake tubing.

 

Yea i'm going to paint it flat black. I kept the tube because i haven't felt the need to make an intake tube and nobody makes a reasonably priced intake tube for our cars.

 

very nice setup!

 

thanks

 

Where does the "cold" come from?

 

Getting a vented headlight cover and also planning on cutting a hole in front of the filter in the rad support and running a tube from there to the front of the car.

 

That explains where the air comes from, not the cold.

 

Was talking about the piping on the radiator

 

You should consider high temp glueing some sort of heat insulation material for the outside side of the panels. Sheet metal by itself will heat up to equal underhood temps otherwise.

Excellent workmanship fit and finish.

 

Looks good.

 

Fine I'll call it an Ambient Air Intake...

 

O, well I left that on because I hate how the upper radiator shroud looks without the intake pipe.

 

Thanks for the comment. What if I glued some exhaust heat wrap to the outside panels? Do you think that would work, if not what would you suggest?

 

The air coming from outside the car when it moves (via the duct) is colder in relation to the air in the engine bay and therefore it can be called a cold air intake.

I would rather remove the windshield washer reservoir, enlarge the opening and run a duct from there to above the brake duct, quick and easy mod. Only thing about cutting the radiator support is if its not perfectly sealed you'd lose cooling efficiency, though not significantly.

And the sheet metal heating up to underhood temps does very little to lower the IATs...I'm sure it will help but I don't think its worth the hassle. The metal box only seals the air filter, the little bit of temperature change from radiation will be insignificant, IMO.

 

You are probly right about the temp change being insignificant, but i figured i'd give it a shot and if i don't like it i can always convert back to stock. Also wanted to do something different. I might relocate the washer resivoir, not sure tho. We'll see what i can do before AutoX this weekend.

 

I think it is fine just the way you made it. The important thing is to keep the hot discharge air from the radiator from getting sucked directly into the intake duct. The effect of "underhood temperatures" is greatly exaggerated by the ricer aftermarket parts vendors who are trying to sell you their products.

 

Just remove the wiper fluid resevoir and drill a hole through, run some pipe down there to supply to the cold air. That's what I'm doing. Plus if you sealed the stock intake to the top of the box you should get the stock plus whatever you can get from the below area. At least then you can be sure it isn't any worse than stock.

I'm not done yet, how do ya'll feel about his idea?

 

I wanna see one like this where the stock oval hose( the one over the rad cowl) is plumbed into the box.

Nice work

 

There you go.

Now, can you explain how this is better than the stock airbox, given that you're using the stock intake snorkel?

 

Well from what I've read in different places, a round or cone filterflows more air than a flat panel filter, that alone is a benefit. The stock intake snorkel is there more for the aesthetics feature than anything else. Because i don't have the money to go and purchase the Corksport fan shroud and i don't want to have that big dent thats under the snorkel be visable. Call it dumb or whatever you may.

 

Please note that I haven't called it dumb, nor have I commented on the craftsmanship (which is quite good, BTW).
All I've asked so far is about the reasoning behind what you've done.

Examining the intake as a whole, while the cone filter probably flows more than the flat panel, it would seem that the elbow at the throttle body and the MAF are the two most restrictive points, so does increasing flow potential upstream of those two points gain you anything?

To date, you're using the stock intake snorkel and have replaced the stock plastic airbox- which, being quite thick, is probably better insulated than the new sheetmetal surround- and have (probably) increased flow through use of the cone filter.

Is that a fair assessment of progress so far?

 

Sorry for jumping to conclusions. Its hard to judge a persons attitude on this site. Thank you for the comment on craftsmanship. My stock box was drilled out and i suspected some heat soaking through there. And yes you do have a fair assessment of my progress so far. And i do agree that the MAF and the elbow at the throttle body are by far the most restrictive components in the system. I just figured Throwing a cone on the car and for the most part sealing it off the rest of the engine bay, might increase net power. Who knows I might be wrong.