Topic: Cold Air Intake... (Read 1675 times)

Turbaru · « **Reply #25 on:** December 09, 2011, 06:50:15 PM »

Mine was rattling a couple years ago, all it was is this...
The side of the airbox closest to the fender has a black nipple type thing on it that slides into a rubber gromet in the fender, the gromet was missing after body work was performed. The nipple was banging around in that little hole instead of being held nicely in place! New gromet, no rattle!

TylerBeau · « **Reply #26 on:** December 09, 2011, 09:05:32 PM »

Yeah that's part of the problem; right at that point. But my panel/frame is a little warped there from the frame being straightened and that tube won't sit properly in place like it should.

Dave are you suggesting a short ram intake that that ends at the air box with the cone filter actually inside like an air box style casing? I'm sure you are. But with that do I need to keep the rest of the inner fender plastic tubing or can I remove that all and get sufficient air flow to the intake.

rshaw123 · « **Reply #27 on:** December 10, 2011, 02:07:24 AM »

Your best bet is to buy the snorkus delete, then everything will be stock and you will have a more throaty sound from the motor.

Kavik · « **Reply #28 on:** December 10, 2011, 04:41:16 AM »

there are so many combinations you can do.....just pick one and go for it, other than noise levels you're not going to see any difference.
-Fix the rattle, sound stock
-Do the snorkus delete (home made or GPmoto Elbow) and gain a tiny bit of air sucking noise
-Do the shorty intake and hear your car sucking air when you hit the throttle. Won't be as much of a difference on yours as it would be on a turbo, but it should still be a recognizable difference

I have a short K&N Typhoon that sits where the air box used to, with the heat shield to keep it at least partially separated from the engine bay, but kept the big air duct to the fender and the GPmoto elbow to throw colder air at the filter. Is this any different than taking everything else off and letting it suck it's own air naturally from the opening into the fender? eh, probably not...but it doesn't hurt anything, so I didn't bother taking it back out

Trev · « **Reply #29 on:** December 10, 2011, 05:29:58 AM »

you guys are girls, haha, i have no snorkas at all and i don't suck up water, and i only run pretty much half a liner due to it being destroyed.

rshaw123 · « **Reply #30 on:** December 10, 2011, 10:38:11 AM »

Thats how I had my legacy and I tore my inner fender off in a mud pit and the car actually ran better for a few days (probably the mud and such sealed the crack for a couple of hours or something

)

deadlydave · « **Reply #31 on:** December 12, 2011, 11:18:06 AM »

Quote from: TylerBeau on December 09, 2011, 09:05:32 PM

Dave are you suggesting a short ram intake that that ends at the air box with the cone filter actually inside like an air box style casing? I'm sure you are. But with that do I need to keep the rest of the inner fender plastic tubing or can I remove that all and get sufficient air flow to the intake.

You can keep or ditch the plastic tubing, your discretion. You don't have to use an spt-style 'heat shield' but it wouldn't be a bad idea.

You've already spent a bit too much time thinking about this.

TylerBeau · « **Reply #32 on:** December 13, 2011, 03:25:18 PM »

I'm starting to realize that Dave haha. So my laziness in trying to fab something to fix that rattle has me leaning towards an intake. So any input on the following three intakes?

First up... Made by Subaru themselves. The SPT Intake. Sells for about $170 which doesn't include the additional $75 for a SPT heat shield.
https://www.subarugenuineparts.com/product_info.php?cPath=33_68&products_id=1075

Next up... The K&N Short Ram Intake. Has a heat shield built around the filter as well. $300 from JNA Performance.
http://www.jnaperformance.com/index.php?dispatch=products.view&product_id=772

Lastly... The AEM Cold Air Intake. $275 from JNA Performance.
http://www.jnaperformance.com/index.php?dispatch=products.view&product_id=785

Thanks for the help guys. Just starting to grasp some knowledge on intakes. From what you guys have told me I'm thinking the short ram intake with a heat shield is my best option. Just want some opinion on what I've picked out and the pricing.

deadlydave · « **Reply #33 on:** December 13, 2011, 03:42:41 PM »

I'm partial to the SPT.

TylerBeau · « **Reply #34 on:** December 13, 2011, 03:49:38 PM »

Which is fantastic. Till Fred told me that doesn't work for N/A Impreza's. So now this sounds like the epitome of stupid but the intakes are different for N/A? On a 2.5i, the intake goes directly to the engine? Where as a WRX/STi, the intake goes to a turbo then the engine? Ah fuck. Time for a visit to "How Stuff Works." I'll be back later with more knowledge.

TylerBeau · « **Reply #35 on:** December 13, 2011, 07:21:58 PM »

Well on my research for a CAI or SRI for my 2.5i I stumbled upon this... Which has turned me away from an intake and back to fab-ing something together to stop the rattling. But anyway. This is a good read for anyone with a N/A Subaru looking to put on an intake for performance reasons. It will not only NOT increase your performance. But more importantly for me just looking for a fix to my loose tubing/air box, it will HURT your performance...

http://forums.nasioc.com/forums/showthread.php?t=1471819

Kavik · « **Reply #36 on:** December 13, 2011, 09:02:41 PM »

hmmmmmm, interesting topic in that link. although how the fuck anyone would ever think to connect that issue to that piece is beyond me

TylerBeau · « **Reply #37 on:** December 13, 2011, 10:31:28 PM »

So that brings up the question. How much of a negative effect does it truly have on your engine and performance? Because. You could honestly bring up any engine alteration and say, "Oh, this has an extremely bad effect on your car." That is if you look deep in the engineering of the alteration compared to what your car was originally produced for. Basically, what I'm saying is. You can probably take any performance upgrade and say it's bad for the car in some kind of way because it's not what the car was built to do. But in this scenario, how large of a negative effect does it have on the engine? How many people have ran an intake on a N/A car and have been fine with no performance issues? Should I really worry. I don't know. I'm not an engineer.

hydrochloric · « **Reply #38 on:** December 14, 2011, 01:23:28 AM »

Some days I love having a MAP-based car....

Honestly, I wouldn't worry about it. I understand the feeling, I usually get that exact notion of "I don't know what I'm doing, I'm not an XYZ!" when doing some big job on the car (say, the first time I swapped struts. Now I can dump the things in/out in about an hour). But, using the phrase "If you're that worried about being a bad parent, you won't be," you're worrying so much about this, you'll be fine with whatever. Might you have a rich spot in the RPM? Yeah. But as pointed out, it's not bad enough to cause drivability issues, and rich is a far better issue than lean. I run basically no intake on mine, I know someone who has a Cobb (IIRC) on his, there's thousands of people who run intakes on NAs, and I don't think anyone has ever blown up an engine doing it.

rshaw123 · « **Reply #39 on:** December 14, 2011, 12:54:04 PM »

Couldn't you get a tune that will get rid of the rich spot when running? I know the 05+ NAs can support a tune, could that solve the above issue?

TylerBeau · « **Reply #40 on:** December 16, 2011, 07:12:35 PM »

Supposedly a tune still doesn't fix it. I didn't read every little detail and reply to the NASIOC thread. But I do know the guy was saying basically how any intake will harm your car, tune or not. They had come up with some kind of "hybrid" intake that was somewhat okay. But that still uses the air box which I don't want because I'm trying to remove the use of the air box by getting an intake!

So any advice on where to get a reasonable N/A intake? JNA only sells one intake for the 2.5i.

Nitrous · « **Reply #41 on:** January 05, 2012, 04:09:41 AM »

One 2.5i owner to another, don't get an intake unless you make the hybrid intake. You've already found the threads and seen the graphs, don't mess with it. Your air box is rattling... Don't spend $300 on an intake that's detrimental to our cars, spend 30 minutes of your time and make whatevers rattling, stop rattling!

TylerBeau · « **Reply #42 on:** January 11, 2012, 08:12:19 PM »

Haha. Yeah I decided that would be the best way to go. But what about the UEL and Exhaust you did? That doesn't have any negative effect on the engine? Just curious...

Then again, unlike an intake, the exhaust is on the ass end of the engine. So really the only thing that could hurt the engine would be too much back pressure maybe?

rshaw123 · « **Reply #43 on:** January 11, 2012, 09:49:05 PM »

Having the UEL headers over the EL ones will cause the car to loose some power but not enough on the NA cars to really notice it.

JLyons013 · « **Reply #44 on:** January 19, 2012, 09:35:23 PM »

Quote from: Trev on December 10, 2011, 05:29:58 AM

you guys are girls, haha, i have no snorkas at all and i don't suck up water, and i only run pretty much half a liner due to it being destroyed.

This is how my 06 impreza was...fender liner destroyed and i took the snorkus out. there was no difference in absolutely anything..not sound power or performance in any respect...mine was rattling also so i just took it out. and i drove that car in to the ground in snowy conditions and never had any water issues or anything

Author Topic: Cold Air Intake... (Read 1675 times)