Air box mods!

ethos · 23-11-2007, 20:16

Hi guys,

Has anyone "modded" their air box. There are two things that can be done...

Drilling holes in the bottom and/or definning it.

Has anyone done either with good results? I want a bit more induction noise but don't have the cash to buy an expensive induction kit

Gizmo68 · 23-11-2007, 20:34

Take the cold air feed off the airbox, this will give more induction noise and have the same result as drilling holes in the box - that is they will both reduce power as you will now be introducing warm air (engine bay) into the engine rather than the lovely cold air its designed to have.

A few 1mm holes in the exhaust back box will also compliment this mod and give you a more 'sportier' exhaust note.

ethos · 23-11-2007, 20:49

I don't want to do either of those, and less performance... no chance!!!

Quinten · 23-11-2007, 20:55

I did that on my previous octy. The increase in noise was audible, but I can not comment on performance loss/gain.

Dan Walton · 23-11-2007, 22:00

I think de-finning the airbox (not sure if this is best done clean side or dirty side) is supposed to be worth doing, seeing as it's a free mod! And I'm sure I've read some people had modified the air feed to the standard airbox by running a larger diameter pipe down to the wheel arch area.
It is an Octy vRS you have isn't it and not a 1.2 Corsa? In which case please do not drill your airbox!

ethos · 23-11-2007, 22:03

Ha, yea it's a vRS

The fins on the air box are so small tho, like 10mm high or so...

I think i'm going to take the filter out this weekend and give it a smack or two so might do it whilst im there.

Just got to find something suitable to cut them... bit of a tight angle. Maybe a sharp knife and then bend them till they snap off!

Dan Walton · 23-11-2007, 22:12

Yeah, they're only small but it will make a slight difference in the air flow. I think they are there to try and quieten down the induction noise on the car, but won't necessarily flow air as best as possible. If you imagine pouring water through your air box, those little 10mm high ridges would make a hell of a lot of difference, it'd be like a little water feature, rather than a nice smooth, meandering river... or something!
I think if you score along the join of the ridge to the box they will snap off like you've said. Or if you have a Dremel or similar you could whizz them off in no time. Just make sure there aren't any little bits of debris when your finished, youwouldn't want any nasties going through your turbo!

ethos · 23-11-2007, 22:16

Nope!! Think I might do it around the back and hoover the box after just incase

Would be interesting to see the difference, no-ones actually covered it on here... well from what I can find on search.

The pipercross panel filter helped, want to see how it looks after 5k.

Dan Walton · 23-11-2007, 22:30

I think if you do a search for 'pikey mods' it will covered there somewhere. That or 'de-finning'. I'm sure I remember seeing a few of the guys with quite big power recomended doing it with an 80mm air feed. Thinking about it, I might have read it when I was deciding whether to get a Carbonio, so it might have popped up in one of those searches. Anyway, I'm sure it's been done and calculated/proven by some of the big boys. I will do it to mine when I can be bothered! Too cold to do anything at the mo and I'm too busy...

john_grant358 · 24-11-2007, 11:40

Quote:

Originally Posted by ethos

Ha, yea it's a vRS

The fins on the air box are so small tho, like 10mm high or so...

I think i'm going to take the filter out this weekend and give it a smack or two so might do it whilst im there.

Just got to find something suitable to cut them... bit of a tight angle. Maybe a sharp knife and then bend them till they snap off!

I definned my airbox in my fabia, very slight improvement in throttle response, but barely noticable, prob would make more difference with a higher performace airfilter which i should be getting soon!

I used a chissel and a hammer to get them off, got to be carfull you dont go through the whole box though! I then used some sandpaper to tiddy up the job. Cut the sh*t out of my hand tho!

smstext · 24-11-2007, 13:17

why not just buy a new airbox thats smooth? surely someone sells such a thing?

Dan Walton · 24-11-2007, 13:48

Why not just buy a Stanley knife and improve the standard one?

Basil · 24-11-2007, 14:28

Dremel tool (which would be a nice Xmas pressie) will do the job neatly.

23-11-2007, 20:16	#1
ethos Briskodian Join Date: Jun 2007 Location: Cornwall Posts: 1,179 Members Car: Thanks: 60 Thanked 37 Times in 33 Posts	Air box mods! Hi guys, Has anyone "modded" their air box. There are two things that can be done... Drilling holes in the bottom and/or definning it. Has anyone done either with good results? I want a bit more induction noise but don't have the cash to buy an expensive induction kit

23-11-2007, 20:34	#2
Gizmo68 Briskodian Join Date: Dec 2004 Location: Hawkinge Kent Posts: 1,276 Members Car: Superb Comfort 1.9 TDi 130 Thanks: 16 Thanked 78 Times in 75 Posts	Re: Air box mods! Take the cold air feed off the airbox, this will give more induction noise and have the same result as drilling holes in the box - that is they will both reduce power as you will now be introducing warm air (engine bay) into the engine rather than the lovely cold air its designed to have. A few 1mm holes in the exhaust back box will also compliment this mod and give you a more 'sportier' exhaust note.

23-11-2007, 20:49	#3
ethos Briskodian Join Date: Jun 2007 Location: Cornwall Posts: 1,179 Members Car: Thanks: 60 Thanked 37 Times in 33 Posts	Re: Air box mods! I don't want to do either of those, and less performance... no chance!!!

23-11-2007, 20:55	#4
Quinten Crossdresser Join Date: Apr 2003 Location: fast lane Posts: 10,000 Members Car: Citroen C-Crosser 2.2HDI Thanks: 25 Thanked 40 Times in 37 Posts	Re: Air box mods! I did that on my previous octy. The increase in noise was audible, but I can not comment on performance loss/gain. __________________ Awooga!!!

23-11-2007, 22:00	#5
Dan Walton Briskodian Join Date: Mar 2007 Location: Basingstoke Posts: 506 Members Car: Thanks: 3 Thanked 19 Times in 17 Posts	Re: Air box mods! I think de-finning the airbox (not sure if this is best done clean side or dirty side) is supposed to be worth doing, seeing as it's a free mod! And I'm sure I've read some people had modified the air feed to the standard airbox by running a larger diameter pipe down to the wheel arch area. It is an Octy vRS you have isn't it and not a 1.2 Corsa? In which case please do not drill your airbox! __________________ J'ai douze ans!!

23-11-2007, 22:03	#6
ethos Briskodian Join Date: Jun 2007 Location: Cornwall Posts: 1,179 Members Car: Thanks: 60 Thanked 37 Times in 33 Posts	Re: Air box mods! Ha, yea it's a vRS The fins on the air box are so small tho, like 10mm high or so... I think i'm going to take the filter out this weekend and give it a smack or two so might do it whilst im there. Just got to find something suitable to cut them... bit of a tight angle. Maybe a sharp knife and then bend them till they snap off!

23-11-2007, 22:12	#7
Dan Walton Briskodian Join Date: Mar 2007 Location: Basingstoke Posts: 506 Members Car: Thanks: 3 Thanked 19 Times in 17 Posts	Re: Air box mods! Yeah, they're only small but it will make a slight difference in the air flow. I think they are there to try and quieten down the induction noise on the car, but won't necessarily flow air as best as possible. If you imagine pouring water through your air box, those little 10mm high ridges would make a hell of a lot of difference, it'd be like a little water feature, rather than a nice smooth, meandering river... or something! I think if you score along the join of the ridge to the box they will snap off like you've said. Or if you have a Dremel or similar you could whizz them off in no time. Just make sure there aren't any little bits of debris when your finished, youwouldn't want any nasties going through your turbo! __________________ J'ai douze ans!!

23-11-2007, 22:16	#8
ethos Briskodian Join Date: Jun 2007 Location: Cornwall Posts: 1,179 Members Car: Thanks: 60 Thanked 37 Times in 33 Posts	Re: Air box mods! Nope!! Think I might do it around the back and hoover the box after just incase Would be interesting to see the difference, no-ones actually covered it on here... well from what I can find on search. The pipercross panel filter helped, want to see how it looks after 5k.

23-11-2007, 22:30	#9
Dan Walton Briskodian Join Date: Mar 2007 Location: Basingstoke Posts: 506 Members Car: Thanks: 3 Thanked 19 Times in 17 Posts	Re: Air box mods! I think if you do a search for 'pikey mods' it will covered there somewhere. That or 'de-finning'. I'm sure I remember seeing a few of the guys with quite big power recomended doing it with an 80mm air feed. Thinking about it, I might have read it when I was deciding whether to get a Carbonio, so it might have popped up in one of those searches. Anyway, I'm sure it's been done and calculated/proven by some of the big boys. I will do it to mine when I can be bothered! Too cold to do anything at the mo and I'm too busy... __________________ J'ai douze ans!!

24-11-2007, 13:17	#11
smstext 2.0 FSI Sport. Join Date: May 2007 Location: oxon Posts: 9,710 Members Car: Octavia Mk2 FSI Sport Thanks: 11 Thanked 304 Times in 271 Posts	Re: Air box mods! why not just buy a new airbox thats smooth? surely someone sells such a thing? __________________ Oxon Meet Feeler 2009 please add your input, click here

24-11-2007, 13:48	#12
Dan Walton Briskodian Join Date: Mar 2007 Location: Basingstoke Posts: 506 Members Car: Thanks: 3 Thanked 19 Times in 17 Posts	Re: Air box mods! Why not just buy a Stanley knife and improve the standard one? __________________ J'ai douze ans!!

24-11-2007, 14:28	#13
Basil Hardcore Join Date: Feb 2006 Location: Bahrain Posts: 3,258 Members Car: Fabia vRS Thanks: 200 Thanked 194 Times in 151 Posts	Re: Air box mods! Dremel tool (which would be a nice Xmas pressie) will do the job neatly. __________________ Fab vRS - Black Magic - PD160 intake - Forge FMIC - colour coded front grille -SLC Splitter - K&N Airfilter -SEAT Strutbrace - Jabba ARB - IC Waterspray (need to wire it in!) - 312mm TT brakes - Eibach Springs - Skoda Reversing sensors - Devonutopia Tuning (tm) Custom Exhaust (2 1/4" straight pipe) - Short shifter mod- 5 brake light mod - Helix Steel SMF + Organic Clutch + pressure plate - Peloquin LSD - TD stage 2 Hybrid - Washbrook remapped ECU - Uprated injectors - Cupra bushes -Poly-filled dogbone - Allard racepipe - Pirelli Dragons - Forge Rear Strutbrace - DIY SS upper boostpipe delete -Koni FSD's - elephant pipe CCV mod

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