Notices
993 Forum 1995-1998
Sponsored by:
Sponsored by:

Motor sound airbox cover or not?

Thread Tools
 
Search this Thread
 
Old 01-29-2008, 12:29 PM
  #1  
TAI2
Rennlist Member
Thread Starter
 
TAI2's Avatar
 
Join Date: Mar 2004
Location: Chadds Ford, PA
Posts: 1,325
Likes: 0
Received 2 Likes on 2 Posts
Default Motor sound airbox cover or not?

Which do you think sounds better, a motor sound airbox cover or a filter assy without any cover at all? I've got a carbon fiber airbox (basically a filter holder) now and I'm wondering if my car will sound better with the perforated airbox cover. Thanks.

Tom
---------------------------------------------------------------------------------------
96 Cabrio - black w/cashmere
26K miles
Fabspeed exhaust
RS splitters
18" aftermarket turbo twists
Rennsport pedal set
Carbon fiber airbox
Strut brace
Old 01-29-2008, 12:35 PM
  #2  
jimbo3
Rennlist Member
 
jimbo3's Avatar
 
Join Date: Oct 2005
Posts: 13,379
Likes: 0
Received 727 Likes on 438 Posts
Default

Fit on the after-market "cover" is notoriously poor and there isn't any benefit in HP or sonics. Motorsound cover is ~$80. Or, you can chop up your OEM cover any way you want for $0. A quick search will reveal what others have done.

-Jim
Old 01-29-2008, 12:44 PM
  #3  
95GPW993
Intermediate
 
95GPW993's Avatar
 
Join Date: Oct 2007
Location: Virginia
Posts: 39
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by jimbo3
Or, you can chop up your OEM cover any way you want for $0.

-Jim
+1

I haven't used a MS cover, but my home-made OEM cover sounds great at wide open throttle.
Old 01-29-2008, 12:47 PM
  #4  
fast_freddy
Rennlist Member
 
fast_freddy's Avatar
 
Join Date: Mar 2006
Location: www.rlsafespace.com
Posts: 25,904
Received 809 Likes on 437 Posts
Default

Have had all sorts of iterations.... Regular cover, regular cover with a few holes drilled in it, Fabspeed cover, regular cover that is somewhere between a Fabspeed and one with a few holes drilled. I'm the most happy with the last option on my 993. I have a cat bypass and maxflo mufflers and with the fabspeed cover it was far more obnoxious than it is now. I also have the cold air intake on it too as I have a fixed rear spoiler.
Old 01-29-2008, 02:52 PM
  #5  
shamrock
Racer
 
shamrock's Avatar
 
Join Date: May 2006
Location: Dublin Ireland
Posts: 486
Likes: 0
Received 2 Likes on 2 Posts
Default

I've just fitted a home made version of the motorsound to my car , I'm very happy with the cheap mod. You really do only notice the difference when accelerating at full throttle ... There's a much fuller sound with more of a 'bassier' overtone than before.
I went the cautious route and bought an oem airbox filter cover on ebay for $10 so I could butcher it and then return to my original part if I made a mess of the mod or just plain didn't like the sound.

Btw , it would have been a lot less work to just cut 6-8 bloody great holes on the lid , but I was afraid of getting rain water in thru larger holes , seeing as the car is sitting on a driveway here in sunny Dublin
Old 01-29-2008, 02:56 PM
  #6  
Derek_C
Instructor
 
Derek_C's Avatar
 
Join Date: Sep 2002
Location: Valparaiso, Indiana
Posts: 225
Likes: 0
Received 2 Likes on 2 Posts
Default

Shamrock,

A driveway? Exposed? Garage queens 993s around the world are cringing!

JK.

Derek
Old 01-29-2008, 03:15 PM
  #7  
jscott82
Rennlist Member
 
jscott82's Avatar
 
Join Date: Aug 2006
Location: Charlotte, NC
Posts: 3,104
Received 383 Likes on 251 Posts
Default

just my 2 cents..... But I think the sound of the open airbox is great. But my gut feeling (no real data to back this up) is that the stock opening flows PLENTY of air so there is no real benefit of opening it up more. What you do end up doing is pulling in warmer (less dense) air. For a net loss of .0000001 hp. If you have a fixed wing, you can install the turbo intake snorkle(?) to get more cooler air and pick-up .0000001 hp.

again just my 2 cents (maybe less)
Old 01-29-2008, 03:22 PM
  #8  
TAI2
Rennlist Member
Thread Starter
 
TAI2's Avatar
 
Join Date: Mar 2004
Location: Chadds Ford, PA
Posts: 1,325
Likes: 0
Received 2 Likes on 2 Posts
Default

Thanks guys. I found an old cover that I'm going to hack up and see if there is a difference between that and my Fabspeed cover (which is actually not a cover at all). I'm not worried about rain as it never ever (OK once or twice) sees rain. I have Maxflow mufflers on the car which sound great. I used to have CAT by-pass pipes on the car but I had to put the CAT back to pass NJ inpspection and decided to leave it on. BTW I have one set of Gillette style Fabspeed bypass pipes for sale. Only 5K miles on them and they are $250 + shipping ($500 new).
Old 01-29-2008, 05:33 PM
  #9  
shamrock
Racer
 
shamrock's Avatar
 
Join Date: May 2006
Location: Dublin Ireland
Posts: 486
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by Derek_C
Shamrock,

A driveway? Exposed? Garage queens 993s around the world are cringing!

JK.

Derek
Would you quit that!!

It's outside in the wind and the rain as I type and it's screaming to come in beside the fire ... And if it weren't for the wife ...
Old 01-29-2008, 08:53 PM
  #10  
McGarrett
Racer
 
McGarrett's Avatar
 
Join Date: Aug 2007
Posts: 466
Likes: 0
Received 2 Likes on 2 Posts
Default

I posted the same question a few months back.

I went with drilling some holes in the stock air box and love the sound. As for the extra power...thats probably just in my head. Here are some of the pictures from that thread.
Attached Images   
Old 01-29-2008, 09:19 PM
  #11  
brucec59
Rennlist Member
 
brucec59's Avatar
 
Join Date: Nov 2004
Location: San Francisco
Posts: 1,796
Likes: 0
Received 5 Likes on 3 Posts
Default

It's not just WOT where you get the sound benefit. Downshifting blips of the throttle are great, too.
Old 01-30-2008, 09:00 AM
  #12  
TAI2
Rennlist Member
Thread Starter
 
TAI2's Avatar
 
Join Date: Mar 2004
Location: Chadds Ford, PA
Posts: 1,325
Likes: 0
Received 2 Likes on 2 Posts
Default

Thanks guys. I'm going to make a new cover this weekend.
Old 01-30-2008, 09:14 AM
  #13  
jenskleis
Rennlist Member
 
jenskleis's Avatar
 
Join Date: May 2004
Location: Lausanne, Switzerland
Posts: 528
Likes: 0
Received 1 Like on 1 Post
Default

I drilled the airbox on my 964 and loved the deep, rumbling growl it emitted when accelerating hard.

However, on long drives on German highways it became very tiring to listen to.

So, I reverted to the stock set-up.

But, it sure did sound good though....



Quick Reply: Motor sound airbox cover or not?



All times are GMT -3. The time now is 12:45 AM.