Which style of intake is better?

[02legacygt]

which style of intake is better?
I have a 02 BE

Hp? Torque?
I dont knwo if anyone will have actual numbers as the one is a DIY, but please chime in and let me know

this is what i got now.
http://home.comcast.net/~samur_devil/intake2.jpg


vs.

https://sl-i.net/FORUM/

i know i dont have a MAF but you get the point?

[mrpyb]

i say stick with what you have, it looks like a good setup and all you would notice getting a SRI is probably just more noise. but no noticeable hp/torque/mpg

[Huffer]

stay with what you have. Alternatively, you could fab up a Cobb-style intake with a circular/tube-style air filter and J-bend before the throttle body, that will delete the air filter box right at the throttle body.

If you look at DLC's BE in the MR1 section you'll find detailed pics of the Cobb-intake.

[Grafton]

normally i don't disagree with reason but keep your tourqe/filter box (current setup), it helps with the mid range according to rs25.com

[02legacygt]

yeah, i tried today to remove the intake tubing, and lost all my low end... i mean all of it!

i dont know, im always looking for something different and to change.

I feel my car has lost some of its "go" as of late, and if changing my current setup is going to hurt my hp and tq, then ill just stick with what i got!

[Reason]

normally i don't disagree with reason but keep your tourqe/filter box (current setup), it helps with the mid range according to rs25.com


:smt017 I didn't say anything...

[rougeben83]

what you have right now is actually a real CAI. Paint the tube some snazzy color if you really need to mess around with your intake :D

[02legacygt]

well i actually fabbed mine out of black abs, i went to a local hardware store, and they had abs tubing

i cost me around 10$, so thats what im gonna keep.

i think i need to either get a recharge kit for my k&n, or get a new one.

[Reason]

I have a bad ass panel filter you may want.

[02legacygt]

???? I had to special order my panel filter becuase its the longer style. LMK

[dann]

what you have right now is actually a real CAI. Paint the tube some snazzy color if you really need to mess around with your intake :D

lol... i have Chrome plastic. :grin:

[99gtlimited]

you could get a 90 degree adapter for the end of the metal tube and try and find a way to pull air from the fender well instead of the engine bay, that's what I'd do.

[d1giPhux]

So after removing the torque box that connects to the throttle body.. you say you lost a bunch of low end? Hmm.. strange. I'm trying to figure out what setup I want to run right now as well.

I previously had a SRI, no torque box on my 99 LGT.. seemed to run okay, not as much torque as I would like.

Changed it over to a stock air box with stock subaru tubing and no torque box.. and still no difference really.

Soon I'm going to be using my SRI intake tubing, the air box, and no torque box.. and hopefully will gain some low end back.

BTW: How do you like the ABS plastic for the intake? Does anyone know if this stuff is toxic like PVC when heated?

[Huffer]

which style of intake is better?
I have a 02 BE

Hp? Torque?
I dont knwo if anyone will have actual numbers as the one is a DIY, but please chime in and let me know

this is what i got now.
http://home.comcast.net/~samur_devil/intake2.jpg


I'd stick with what you have - that will get just as much cold air funneled in as a "fender well" CAI.

[d1giPhux]

^ I would actually think that it might get more.. doesn't that intake scoop go directly out to the front almost like a hood scoop?

[99gtlimited]

The only reason I'd suggest going into the fender well is that it would lengthen the effective length of the intake, which will help you regain low-end torque. Adding a pipe in the fender mad a noticeable difference in low-end on my EJ25D.

[d1giPhux]

Really? Thats weird.. hmm. I thought that restricting the air flow a bit might increase torque, whereas having the intake sucking up more air increases air flow. So something about having longer piping must make more low end.. interesting to know. I'm messing about with this right now.. so this is all good info!

[99gtlimited]

think about sucking through a straw, the longer it is the harder you have to suck (using the same diameter), but at the same time there is a point where it can be too long and you'll just be restricting the intake system.

also if you continuously make the diameter of the piping smaller as you get closer to the TB, you will effectively increase the velocity of the air going into the motor since it will have to go from a slower rate in a bigger tube to a faster rate through a smaller tube. Again, this is working with theory, so don't just put a huge bell reducer/restrictor in your intake.

[Huffer]

Theoretically, a longer pipe will "store" cooler air much like a torque box is supposed to - but it's all heresay without the proper measuring tools.
I also don't think going into the fender will actually provide more "length" over that factory air scoop. If you measure it out, it's pretty damn big, and wide.

There's a few WRX guys adapting that funnel to feed air onto their SRIs...

[d1giPhux]

Yeah.. i would keep the front mount type you have currently.. going into the fender also presents the problem of picking up water / snow / dirt / etc.

I'm not sure what I should do with my intake at this point in time.. needa get some torque back.. or would really like to. Maybe its there.. but since I've always had the SRI on the car.. dunno what the 'stock' feeling really feels like. Don't get me wrong.. its not lacking right now, I'm just trying to squeeze it for all its worth!

[99gtlimited]

Theoretically, a longer pipe will "store" cooler air much like a torque box is supposed to - but it's all heresay without the proper measuring tools.
I also don't think going into the fender will actually provide more "length" over that factory air scoop. If you measure it out, it's pretty damn big, and wide.


Like I said, it's mostly theory and hard to get to work in real life, but you can use the knowledge to guide your modification.

Also, that scoop works as a plenum, basically a low velocity air pocket, slowly getting sucked into the tube, creating the effect I was talking about earlier. The only concern with that design is that there are two large plenums, separated by a smaller diameter tube. This creates a condition where the air must speed up to enter the tube, then slow down as it enters the "airbox" plenum, and will be sucked into the TB at a lower velocity than if it were a constant diameter tube. Subaru says these plenums are for holding large masses of air that would be needed when going to WOT to prevent starving the engine of the extra air needed. In my experience, it is good to keep at least one plenum (compared to 3 in the stock intake), and put it as far down the intake tract as possible, thus allowing a longer distance for the air to "speed up" before entering the intake manifold.

[02legacygt]

yeah, the tube going to the factory "ram air intake" seems to be the best, and right now im running 2" pipe i have good low end, really awesome high end, infact sometimes my 50-90 catches me off guard on how fast it picksup.

so thanks for all the input im going to stick with what i got!