custom intake...a few questions

[DrIfT_FoReVeR]

hi all. i just did my first major modification (major as in not sleepy eyes and pedals lol :pface) to my car, and it seems to work very nicely! i custom fabricated a "cold air intake". i basically put a high flow cone filter on the stock intake tube of my '93 hatch. it was quite a pain to get in, simply because i had to rip the little gold bell shaped kind of thing out of the inside of the air filter box and attach it to the end of the air temp sensor (i think thats what it is) so i could fit the filter in. anyway, the filter fits VERY snugly...after i crammed it in there initially, i had to work it hard to get it back out, then even harder to get it back in, so i know it's making a tight seal...now for the questions/concerns.

first off, there was a small pipe running from the stock filter box to a little black box, and down into the depths of the engine bay. i figure that this is a vaccum regulator or something of that sort, seeing as it branched out into a few different vaccum tubes. what should i do with this? should i buy one of those little breather filters and put it on the end of the small tube to give it filtered air, or just leave it out in the open?

secondly, my engine sounds normal, up until i give it wide open throttle, or the rpms pass about 3500. after that, it starts to sound VERY deep...much deeper than it sounded before...and i get a hard kick of acceleration in the mid-high ranges of the RPMs. my friend who has rode with me MANY times before and who has been in my car through many different street races says that he can feel an incredible amount of acceleration and a beautiful sound compared to before. i don't know if the sound is good, but i love the accels. my question is should it sound different? should it sound lower and louder?

i dont have any kind of exhaust or headers either...everything except the pedals, the sleepy eye mod (from these forums lol) and the intake is all stock btw.

thanks for all help, i appreciate it, and thank you all for giving me the inspiration to begin the long journey down the wide, long road of car modification.

...yeah.

[SilviaS14KA24DE]

ROFL. that sound is GOOD!! That means you're getting more air, and the "kick" is acceleration pick (also good, makes you accelerate faster). the plastic tubes that come from the bottom to the stock box, remove them. You will see a black resonator box underneath, in the bumper area. Take that out, you don't need that. Then you will have colder air flowing into your cone filter.

for those tubes, just plug them off somehow (like put a big enough screw and jab it into it, then seal it with some sort of sealant), or put those breathers.

[Arrow]

Well, the tubes that I think he was talking about are the AIV lines... You have two options with those: one you could remove the entire assembly (there is a thread about it on here, just search), or you could buy one of the breather filters and put it on there.

What that AIV does is it helps out emissions (a little) by when your exhaust manifold is cold and just warming up it gives some filtered air for the exhaust. But when the car warms up it closes and serves no purpose... Now if it is not working properly you could have some problems with exhaust gas going into your air intake (more of a problem for those that still have the factory 'air filter box'....

[DrIfT_FoReVeR]

lol ok! thats GOOD news to hear! i was so scared that i messed up my engine, cause my stock "air box" was shot to hell after i took that little goldish piece out. also, i think this is bad, but slightly above the air filter inside the stock box was a little hole that was letting in non filtered air, so im glad that i finally got up the nerve to take that POS out and put in a high-flow.

anyway, ill go get one and put a breather on it tomorrow. i dont want to risk taking the system out and messing something up, this car is my only way around.

ill take out that resonator box tomorrow morning since its pitch black outside right now. (lol i just watched pitch black on sci fi) and ill see what happens and update. actually, i might just go out with a flashlight...thats how i took my exhaust heat shield/shroud off last night...man that thing was a *****...the metal was dented and rubbing my headers...POS pothole...

anyway yeah, ill update tomorrow...if anyone has any advise as how to get more air into the engine compartment, definately share...im sure that after i take out that damned box ill have a lot more air, even though there is only a 2 inch hole...lol

THANKS!~!!#!

[PhaneSoul]

ram air effect, use a cone to route air from a hole in the bumper or sumn up to the area where your cone is....

[DrIfT_FoReVeR]

i remember reading that somewhere else on the forums, but i cant remember what the guy made it out of...ill look around the house for anything that might work...any ideas on how to keep water from splashing through the duct and through my filter?

[edit]damn, and its going to rain tomorrow...does water get into the engine compartment and possibly into the filter through the little duct behind the drivers side headlight? and if it did, would it get sucked into the engine, or just collect in my intake tube?

thanks for the help guys i really appreciate it!

oh, and excuse my paranoia, im totally new to the whole car modification world.

[SilviaS14KA24DE]

lol that was me. Anyway, it's not really "Ram Air' because you're not going fast enough (even if you speed) to creat Ram Air Induction. All I did was buy some dryer tubing (the tube that exhausts the hot air out of your, well dryer) and put that through the hole when you take out that intake silencer box (big black box in the bumper. Once that is out, I put the tubing there like I said, then attatched to the other end a vent from Home Depot. THe vent inlet is like a rectangle that connects to the dryer hose.

This is more of a Cold Air Induction system. This just brings colder air from the outside into the enigine bay where the intake filter is, thus the filter gets the cold air.

thats all to it.

and no, it's not strong enough. The cold air induction does not have any "sucking " power. It's like a hood scoop you can say, it jsut scoops air. It has no power to suck air in.

[Arrow]

Also, what type of cone filter did you get? And you mentioned that there was a tiny hole letting in outside air... Was that there from the temperature sensor?? It is a little resistor or better yet a variable resistor (I believe) and it helps the ECU determine the air temp and the ECU adjusts timing and fuel mixture and such.... Anyway that I see it, I believe that you would still want that little temp sensor. You sould put it near the filter, or find a way of putting it in that filter (some brands have a small hole for it already, others don't, but I wouldn't make a hole in the filter for it!)

Although since your car is a 93 you might not have that temp sensor.... I am not sure mine has it but mine is a 90.... One of these other guys could probably tell you if you should have it and possibly if you really 'need' it. I am keeping mine but I might not 'need' it persay...

Oh yeah, and don't worry about water getting to it.... That shouldn't happen inless you go through a 2 foot puddle! Then you might have some problems! But for the most part you should be OK.

[Dougster]

I also made a duct to bring in cold air into the filter area...Works well.happy motoring!

[SilviaS14KA24DE]

no. The hole on the bottom was from the intake silencer box. Go look. Remove your stock box, and there is a hole on the bottom. Now turn your wheel all the way to the right and open the dust guard that covers the whole wheel well. You will see a black box. Remove it. This only silences your intake. Once you remove it, you will have colder air flowing in.

[SilviaS14KA24DE]

go here

http://www.nissaninfiniticlub....ber=1

[DrIfT_FoReVeR]

arrow, there was a small hole, but it wasn't meant to be there. it was a piece that broke off my airbox when i got into a wreck about 3 years ago. i think the air temp sensor is that metallic black thing that go on the intake tube that passes over the fan shroud...i could be wrong, but that is still there. every sensor is accounted for, and id know because it doesnt smoke or smell. oh, and before i forget, i just got one of those 25 dollar autozone (autozone is my friend) high flow filters that were designed for a cold air intake. ill get an AEM as soon as i feel like parting with 200 dollars (or less if i look to ebay)

silvia, i know what youre talking about with the box, and it was that thread that i got this idea from lol! when i got into my wreck [mentioned above] i had to take those little dust guards out on all 4 wheels to bend the metal back to shape. anyway, the CAI looks nice, and im going to run up to home depot after i get a breather from autozone or wal-mart or something and get that dryer hose and vent. any idea on how much the vent and hose costs? can i get the hose in sections?

thats cool that water wont get in, im glad about that...also, i must be lucky or something cause i went outside this morning and it had already rained while i was sleeping! score! anyway yeah im about to get dressed and go get those materials.

once again, THANKS EVERYBODY!

[SilviaS14KA24DE]

lol yeah it's like, 11 bucks for the hose and the inlet vent. CHEAP!

[DrIfT_FoReVeR]

well it was like 17 for hose and inlet, but its all good! im about to take out the resonator box and slap that ho(s)e in! ill update with how it turns out!

be right back!

[ziggy682]

secondly, my engine sounds normal, up until i give it wide open throttle, or the rpms pass about 3500. after that, it starts to sound VERY deep...much deeper than it sounded before...and i get a hard kick of acceleration in the mid-high ranges of the RPMs. my friend who has rode with me MANY times before and who has been in my car through many different street races says that he can feel an incredible amount of acceleration and a beautiful sound compared to before.

It's amazing how much psychological horsepower a good intake adds.

[SilviaS14KA24DE]

it does add better flow, better pickup, but not more HP. well maybe .5 - 1

[DrIfT_FoReVeR]

SUCCESS! the project went off without a hitch! everything went on smoothly, except i had to take my front drivers side tire off. lol its all good though, it seems almost like it isnt sucking to get air and like its breathing easier. thanks everybody for all your help with this, i really really really REAAALLY appreciate it! ill post pics up of the cold air induction and the cold air intake as soon as i can snap them and get them uploaded!

thank you all!

[DrIfT_FoReVeR]

and yeah, i agree that it doesnt add more HP, but it just seems like its got more kick...it feels like it...maybe it is psychological, but i beat my friend's '96 mustang standard, and my racing buddy's '02 mustang auto since i put this in, so something has changed...

THANKS AGAIN lol :P

[SilviaS14KA24DE]

lol it doesnt suck at all. when you're driving, the cold air will travel through the tube, into the engine bay right where the intake is. Yes like you said it, easier breathing

[DrIfT_FoReVeR]

well what i meant to say was that it didnt seem like it was STRUGGLING to get air, not sucking...i think i was too excited and just typed whatever. oh well, you get the drift. i went out and shot pool tonight with mark (racing buddy with '02 stang auto) and another friend, and i raced mark again and whooped his ***...although i need a new clutch...anyway, i set off a car's alarm next to me when i started my engine up and revved it, and i have OEM exhaust, so thats cool...

anyway yeah, all is good, thanks for the help...now on with my next project...changing the clutch...

...well actually, saving money to BUY a clutch...

[The Enthusiast]

Still gonna post pics?

[DrIfT_FoReVeR]

yeah, stupid camera is down tho, ill have to use my friend's cameraphone. oh well, ill try to get them up tomorrow or tuesday...ive just been really busy