Induction Noise

funbug Seriously Crusin Dubber

135 posts · joined May 2006 · 19 Feb 2010, 10:00 pm

#763404

Do you guys any suggestions on reducing the induction noise on twin carbs except for importing a centrally mounted airbox? The ones from CSP look nice but seem prohibitively expensive.

Sides Veteran Volks Folk

2,220 posts · joined May 2007 · 20 Feb 2010, 7:41 am

#763430

Know of a couple of people who've built their own airboxes... assuming Weber's, the method was to get some "turbo tops" for the air cleaners, then fab up some PVC pipe and bends (Bunnings Speed Shop 😉 ) to link the two sides together but still clear throttle linkage, lid hinges etc. then finally install a couple of K&N style pod filters in the middle section.

gracey might chime in... he's gotten some pretty good results from his setup...

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Sides Veteran Volks Folk

2,220 posts · joined May 2007 · 20 Feb 2010, 7:44 am

#763431

Oh - and from experience with noise limits at race tracks, it's amazing how much improving engine bay sealing can reduce the noise.... several of the Escort guys I run with, if they don't seal the edges of their bonnets (speed tape), they go over the 95dBA noise limit !!!

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grumble Son of Jim - Creator of Good

2,672 posts · joined Jun 2008 · 20 Feb 2010, 9:40 am

#763442

We tried Dynamat in the rear and covers over the filters and this worked to a small degree,but at 100kph the noise was still excessive,so we modified a Hyundai excel air box and fabricated the tubing to suit,this works quite well. With a bit of time spent at the dismantlers yards you should be able to find a smaller filter box off something late model and as sides says fabricate what you want.

Sides Veteran Volks Folk

2,220 posts · joined May 2007 · 20 Feb 2010, 10:24 am

#763450

Also check out this post for CT's pic of a simple setup he had on an earlier incarnation of his car

http://forums.aussieveedubbers.com/viewtopic.php?tid=65455&page=2#pid619249

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Craig Torrens 6 times Australian, 7 times State Hillclimb Class Champion

8,040 posts · joined Jan 2003 · 20 Feb 2010, 10:29 am

#763451

use ear plugs, thats how i fixed the problem 👍

Bizarre Moderator The artist formerly known as blue74l

12,785 posts · joined Aug 2002 · 20 Feb 2010, 11:11 am

#763456

speak up - i cant hear you 😂

Futue te ipsum!!!

Joel Now containing 100\% E-Wang

9,368 posts · joined Feb 2006 · 20 Feb 2010, 11:59 am

#763461

my kadrons came with insertion rubber glued to the air cleaner lids,

cant say i noticed if itdid much i removed it, cos after twin 40mm webers the roar of kads is nothing

funbug Seriously Crusin Dubber

135 posts · joined May 2006 · 20 Feb 2010, 12:51 pm

#763466

Craig Torrens wrote:use ear plugs, thats how i fixed the problem 👍

I would still like to listen to music on long drives!

colonel mustard Son of Jim - Creator of Good

2,829 posts · joined Feb 2009 · 20 Feb 2010, 1:53 pm

#763476

Joel wrote:my kadrons came with insertion rubber glued to the air cleaner lids,

cant say i noticed if itdid much i removed it, cos after twin 40mm webers the roar of kads is nothing

now I have something to look forward to..

Sides Veteran Volks Folk

2,220 posts · joined May 2007 · 20 Feb 2010, 8:24 pm

#763511

funbug wrote:
Craig Torrens wrote:use ear plugs, thats how i fixed the problem 👍
I would still like to listen to music on long drives!

Hmmm... sounds like the problem is with your stereo then, and nothing to do with induction noise at all !!!

😂

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Join a car club - get car peeps

My toys
'70 Hillclimb Bug 'Jezebel' w/- Haltech EFI - http://bit.ly/VwTNtQ
'60 KG Coupe - resto kinda started
01 New Beetle - gf's car, but I turn the spanners