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Old 05-30-2008, 07:26 AM   #376
XanRules
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yeah, I didn't properly connect one of the hoses.
It's allll good now.
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Old 05-30-2008, 09:48 AM   #377
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has anybody tried building a hybrid on an 08? i know there isnt a CAI or SRI kit out for the 08 yet, but would an ebay kit from 07 work anyway with modification and such?
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Old 05-30-2008, 01:01 PM   #378
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^ again I don't see why not. it is basically the same just a larger bend if I remember correctly. Post up some close up pics and it would be easy to see.
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Old 06-02-2008, 12:01 AM   #379
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Here's a pic of my setup. Phone pic is really terrible, I know.


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Old 06-02-2008, 01:12 AM   #380
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i thought the hybrid is really only beneficial to 05+ imprezas cause the MAF?
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Old 06-02-2008, 02:28 AM   #381
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^^99 and prior also have maf based systems...
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Old 06-02-2008, 08:59 AM   #382
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The SRI tube I got for my 07' Imp Looks like the others making the hybrid, but is about 10" too short to reach the MAF housing. I'm thinking of trying connecting it to the corrugated tube with that "?" shaped tube coming off it, that connects to the torque box, but wondering if I'd be able to tell if it does something bizzare, leaving it in place.

Can't figure how to disconnect the white plastic sensor with 2 hoses running into it on the front of the torque box, and how I'm going to connect it to the hybrid pipe. Don't want to go breaking the housing.


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Old 06-02-2008, 01:09 PM   #383
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don't hack up the stock pieces, whatever you do.
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Old 06-02-2008, 01:19 PM   #384
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Quote:
Originally Posted by XanRules View Post
don't hack up the stock pieces, whatever you do.
wouldn't do that, and trying to avoid breaking them. I think I can connect the corrugated tube by just cutting the slight bend off the SRI pipe, If I can compress the corrugations a bit. I wanted to try it with that tube anyway, so looks like it will be easier to do it that way first.

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Old 06-02-2008, 01:27 PM   #385
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I think the corrugated pipe is the problem. If your SRI tube isn't right, get one that is.
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Old 06-02-2008, 02:03 PM   #386
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Quote:
Originally Posted by williaty View Post
I think the corrugated pipe is the problem. If your SRI tube isn't right, get one that is.
I thought the tirque box was said to be the main problem, but I guess not.

I got the recommended pipe, and trying to find one that will fit better will be hit and miss so I'll extend this one with pipe. Have to find out how to get the gizmo off of the torque box, or I'm stuck.
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Old 06-02-2008, 02:14 PM   #387
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Quote:
Originally Posted by Vince F View Post
I thought the tirque box was said to be the main problem, but I guess not.
Honestly, I'm not sure, as I removed both pieces at the same time. However, corrugation is NOT good for flow. So it is likely a combination of the corrugation and the sharp turn in the black box.
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Old 06-02-2008, 02:35 PM   #388
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I'd think that if the problem was air flowing back and forth past the MAF giving a false air flow reading, that something that bounces the flow back past the MAF would be the cause. When the intake valves close, there is supposed to be a pulse that backs out the intake, which would seem to cause the problem, which is why I am curious what that "?" tube does, since that could divert or reduce the flow back to the MAF.
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Old 06-02-2008, 04:25 PM   #389
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Quote:
Originally Posted by Vince F View Post
I'd think that if the problem was air flowing back and forth past the MAF giving a false air flow reading, that something that bounces the flow back past the MAF would be the cause. When the intake valves close, there is supposed to be a pulse that backs out the intake, which would seem to cause the problem, which is why I am curious what that "?" tube does, since that could divert or reduce the flow back to the MAF.
If you'd read the thread, you'd see that this has all been covered. The opening and closing of the intake valves does cause a "bounce" into the intake tract. The "other end" of the bounce is the impedance mis-match between the open end of the intake and the outside world. This causes a reflection. The Helmholtz resonator in the fender damps a MAJOR mode on the low end. The quarter-wave resonator (the think you're calling a question mark) damps a minor mode on the top end.
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Old 06-02-2008, 06:13 PM   #390
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Quote:
Originally Posted by Zefy View Post
^^99 and prior also have maf based systems...
gotcha.
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Old 06-07-2008, 12:53 PM   #391
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Quote:
Originally Posted by scoobnoob21 View Post
hey guys! i just joined this forum, it seems like you guys really know a lot, so i have a question.

i just bout a 2.5i impreza the other day. pretty new, it has like 3000 miles on it. i wanted more power so i got a short intake for it... the problem is that when i hit like maybe 2300 RPM the car like does wierd things and has no power! also, i have a "check engine" light that is yellow, and its on along with the "cruise" light is blinking.

i dont really think that i know alot about cars, or especially subarus...
so any help would be great!

i dont want my new car to break, i just want some more power... and the sound is good too... here is a few picture of my setup. at least for now...

i couldnt figure out how the pipe fit into the part were the air enters the engine, so... well you can see what i did... i thought it was creative.

advice... please





HAHAHAHAHAH!!! WOW!!!! YOU WIN!
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Old 06-07-2008, 03:47 PM   #392
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anyone know how to disconnect that white plastic part on the rubber hose, that goes into the torque box, that is just to the left of the cone filter in these pics?
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Old 06-08-2008, 01:11 AM   #393
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Sup guys, thanks for all the information I could want regarding the intake setups! I was a little ticked about the lack of SAI systems for my 08 2.5i hatch and I had no clue about the MAF issues with fuel usage. Are there any compatible SAI piping available that I can use to make a hybrid? Also would you recomend just using a drop in filter replacement like a K&N or should I just stick with the standard FRAM paper filters? I remember hearing something a long time ago about the oils from the K&N's screwing with AFMs so I dunno if it would also affect MAFs.
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Old 06-08-2008, 01:46 AM   #394
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Quote:
Originally Posted by ronoverdrive View Post
Sup guys, thanks for all the information I could want regarding the intake setups! I was a little ticked about the lack of SAI systems for my 08 2.5i hatch and I had no clue about the MAF issues with fuel usage. Are there any compatible SAI piping available that I can use to make a hybrid? Also would you recomend just using a drop in filter replacement like a K&N or should I just stick with the standard FRAM paper filters? I remember hearing something a long time ago about the oils from the K&N's screwing with AFMs so I dunno if it would also affect MAFs.
The only 2 things anyone can say in answer to that are:

1) It's unclear at this time if the 08's even suffer from the issue described here, their intake tract is very different from prior years

2) The aftermarket foam and oiled cotton filters (K&N, Perrin, etc) do not flow enough extra air to justify the reduction in filtration performance. Paper filters (OEM) offer the best filtration with nearly as much flow as an aftermarket filter.
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Old 06-08-2008, 01:57 AM   #395
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Quote:
Originally Posted by williaty View Post
The only 2 things anyone can say in answer to that are:

1) It's unclear at this time if the 08's even suffer from the issue described here, their intake tract is very different from prior years

2) The aftermarket foam and oiled cotton filters (K&N, Perrin, etc) do not flow enough extra air to justify the reduction in filtration performance. Paper filters (OEM) offer the best filtration with nearly as much flow as an aftermarket filter.
Ok so would you recommend a hybrid as a safe choice or should I wait until someone figures out the intake setup and releases a SAI comes out for my car? Also how different are the 08's intake tract to previous years?

And thanks for the clarification on the filters.
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Old 06-08-2008, 02:02 AM   #396
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Quote:
Originally Posted by ronoverdrive View Post
Ok so would you recommend a hybrid as a safe choice or should I wait until someone figures out the intake setup and releases a SAI comes out for my car?
I would wait. However, don't wait for the first commerical intake for you car as companies will release what they think you'll pay for, NOT what's actually good or safe for your car. Instead, wait for the Tactrix cable capable of logging your car to be released. With that cable, you, or another 08 owner, will be able to prove one way or the other what's actually good for your car.

Quote:
Also how different are the 08's intake tract to previous years?
No idea. I can tell you that a casual glance into the engine bay makes it look a lot different. But that's exactly why I'm telling you that no one knows the answers. Until we see someone dissect it piece by piece with logging along the way, we just don't know what's going on there.
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Old 06-08-2008, 02:45 AM   #397
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another question for my man williaty......



if I had a short ram, and the ecu was in fact thinking i had too much air flow, thus causing me to run rich, would this make my gas mileage go extremely down? it seems i'm only getting around 210 miles to the gallon in my rs (sti cbe, sri, not tuned) and i'm thinking this could be the cause.
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Old 06-08-2008, 03:00 AM   #398
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Quote:
Originally Posted by shanemono4 View Post
another question for my man williaty......



if I had a short ram, and the ecu was in fact thinking i had too much air flow, thus causing me to run rich, would this make my gas mileage go extremely down? it seems i'm only getting around 210 miles to the gallon in my rs (sti cbe, sri, not tuned) and i'm thinking this could be the cause.
The answer is somewhere between "it depends" and "probably". If the error is in a region of Closed Loop that you are frequently seeing, then the theory is that your AF Learning will take car of the issue. If the error is in a region of CL that you aren't seeing often, the theory is that AF Correction will take care of some or all of it. If the error is only in Open Loop, then you'd be using extra gas up there.

Certainly, a change in the intake can affect gas mileage. There are several layers of protection against this, however, sometimes they either aren't enough or can't address the problem.
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Old 06-08-2008, 12:40 PM   #399
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OK, so I looked through page after page of this forum trying to find this thread today before I finally found it right at the top. When the heck did someone sticky this?
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Old 06-08-2008, 04:04 PM   #400
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Will this work for the hybrid intake 07 2.5i
http://cgi.ebay.com/ebaymotors/2002-...ayphotohosting
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