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Old 11-06-2001, 01:30 AM   #1
dvancleve
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Join Date: Mar 2001
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Location: Chandler, AZ
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2007 Outback XT Ltd.
Diamond Gray Metallic

Question Empirical data on snorkusectomy?

I am wondering if there is any data supporting that this mod actually increases anything other than noise. I did the Peaty version (everything outboard of the filter box removed, foam sealer between box and fender, plug in hole). It sounds cool when accelerating, but the humming sound is kind of annoying. Lustreking in the Legacy forum said his G-Tech time didn't improve at all with the mod.

I am thinking about undoing at least some of it to try to stop the humming. I might cut it so that the part coming down from the factory fender opening (which is now blocked) is gone, but all of the silencing chambers are still there. This would remove some of the convoluted factory tubing and still pull only fender air. Since this would be pulling air in from fairly high up in the fender, I think it would be fine to drill some 1/4-1/2" holes in the liner right behind the bumper since it would be very tough to suck in any water. What do you folks think?

Thanks, Doug

P.S. My car in a '97 Outback which I think has an intake setup like the '98 RS...
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Old 11-06-2001, 02:30 AM   #2
jacobhorn
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I did this too. Unfortunately I installed a shielded cone filter at the same time, so I do not know if there is any perceived performance gain from the snorkus removal alone. I think the humming noise is very annoying. I also think the intake sound at WOT is excelent. I am thinking about installing some piping in the fender wall to try and get rid of the damn vacume cleaner sound. I will post if I do this.

jacobjhorn@hotmail.com
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Old 11-06-2001, 09:39 AM   #3
lucien2
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I did it to both our cars based on advice on the board, but I haven't noticed any gain other than aural. Actually, the GT came with a JC intake. I hated it because it starved the plenum of air under sudden WOT inputs (like stop signs at the ends of entrance ramps under construction- not fun). So I put the torque chamber back on, butI can't see how the snorkus really restricts anything- it is just a big secondary reservoir, nothing inherently restrictive about it. Truth be told, I am becoming highly skeptical about the benefits of any intake mod on a Soob, especially ones with a MAF, unless attention has been paid to the torque chamber issue.
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Old 11-06-2001, 10:02 AM   #4
HIHO
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It had to help some. Just by not sucking the hot air out of the engine. It might have only been a 1/2 hp but I bet it did help. I noticed no increase either untill I installed K&N filter. I then noticed better throttle response and milege. I don't mind the humming sound, but if someone finds an easy fix let me know.
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Old 11-06-2001, 03:24 PM   #5
RacerX
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After my snorkusectomy I installed sound deadening material on the fender. I used a material called Dynomat. The intake noise is louder than stock, but no annoying hum or vibrations.
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Old 11-06-2001, 04:22 PM   #6
10th Warrior
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it sounds better, thats it.
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Old 11-06-2001, 05:09 PM   #7
remarcable
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It fixed my hesitation problems I was having.

I have no hum or annoying sounds either.
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Old 11-12-2001, 02:12 PM   #8
rallysquirrel
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How about, increases you Power-to-weight ratio

That's about all it does. You can now put in some sort of duct to get more fresh air from inside the fender
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Old 11-12-2001, 08:36 PM   #9
Peaty
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My wife's 97 Outback Limited and my RS have the same setup with the exception that I put a 3" mandrel bent Al tube between the MAF and Torque box in the RS. The Outback has that harmonic hum at idle and the RS dosen't. The air is cooler in the fender driving around so that should help some.
Temp info here is for the RS but it should be similar with a Legacy I would think.
http://www.scoobymods.com/mods/impreza/thermal.php

RS Setup:

http://www.scoobymods.com/mods/impreza/customintake.php



Personally I feel that the Snorkus will be somewhat restrictive. Also if you look at the above thermal info it's grabbing hot air from the motor bay even when the car is in motion:





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Old 11-12-2001, 11:14 PM   #10
dvancleve
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Question What about this?

I may try cutting my snorkus on that ridge between the #s 2 and 18 in Peaty's picture (and keep the mounting point in the middle). It seems to me that this will be no more restrictive than the stock configuration and will only pull in cooler fender air. Since it will pull air from near the top of the fender, it seems like drilling some holes in the flat lower front portion of the liner without water intake being an issue. What do you think?

Doug
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Old 11-12-2001, 11:27 PM   #11
Peaty
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I actually did that at first too, I still have the part somewhere. Others have done this too. Should work fine. I'd block off the hole in the fender left by the one part though. I used an OEM plug like the pic it only cost like 4 bucks. Still even that part is a little restrictive compared to removing the gasket in the airbox:





Granted with the snorkus part in there the rubber will be expanded some but not as much as just removing it. It's the same for my 97 Legacy and a WRX I worked on.

Peaty
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