DIY Drilled airbox
Burning Brakes
Joined: Dec 2002
Posts: 938
Likes: 13
From: Windsor, England
Here's a link to a vid of my car with its 'holy!' airbox 
:
http://www.carmovies.net/gallery/alb...dragstrip2.avi
:http://www.carmovies.net/gallery/alb...dragstrip2.avi
Burning Brakes
Joined: Dec 2002
Posts: 938
Likes: 13
From: Windsor, England
Originally posted by Manny Alban
Has anyone had a problem with a bad mass flow sensor that was caused by the oil that you have to spray a K & N filter with? That seemed to be the consensus on the failure of the unit. After two years, I'm taking out the K & N cone filer and switching back to the stock assembly, albeit, drilled out Hey, I run straight exhaust...noise is all a matter of perspective.
Has anyone had a problem with a bad mass flow sensor that was caused by the oil that you have to spray a K & N filter with? That seemed to be the consensus on the failure of the unit. After two years, I'm taking out the K & N cone filer and switching back to the stock assembly, albeit, drilled out
Hey, I run straight exhaust...noise is all a matter of perspective.
Racer
Joined: Sep 2003
Posts: 304
Likes: 0
From: Surrey, UK
Don't bother with neat litle holes, just try the 'Battenburg' cake approach....
Just two square holes, one lined up with the intake trumpet...
Now have a picture of same, but can't upload it -HELP!!
Melv
Just two square holes, one lined up with the intake trumpet...
Now have a picture of same, but can't upload it -HELP!!
Melv
Last edited by Cuppie; Dec 14, 2003 at 07:45 AM.
Intermediate
Joined: Oct 2003
Posts: 35
Likes: 0
From: South Africa
Drilled the air box this weekend.
Wow ... what a difference it makes. Scared at least 2 "Hot Hatches" and a neighbourhood of dogs!! K&N filter also fitted. Not sure if this also adds to the enhanced musical note?
IMHO I would recommend the "Holy" box purely on improved sound. Who cares if there are no performance enhancements.
Still smiling.
Adrian
Wow ... what a difference it makes. Scared at least 2 "Hot Hatches" and a neighbourhood of dogs!! K&N filter also fitted. Not sure if this also adds to the enhanced musical note?
IMHO I would recommend the "Holy" box purely on improved sound. Who cares if there are no performance enhancements.
Still smiling.
Adrian
Thread Starter
Banned
Joined: May 2003
Posts: 775
Likes: 0
From: suffolk,england
Originally posted by Adrian WC
Drilled the air box this weekend.
Wow ... what a difference it makes. Scared at least 2 "Hot Hatches" and a neighbourhood of dogs!! K&N filter also fitted. Not sure if this also adds to the enhanced musical note?
IMHO I would recommend the "Holy" box purely on improved sound. Who cares if there are no performance enhancements.
Still smiling.
Adrian
Drilled the air box this weekend.
Wow ... what a difference it makes. Scared at least 2 "Hot Hatches" and a neighbourhood of dogs!! K&N filter also fitted. Not sure if this also adds to the enhanced musical note?
IMHO I would recommend the "Holy" box purely on improved sound. Who cares if there are no performance enhancements.
Still smiling.
Adrian
Paul
C2 cab
Intermediate
Joined: Oct 2003
Posts: 35
Likes: 0
From: South Africa
Paul,
A note within the box stated that the filter was already oiled (arrived in a sealed plastic cover) and could be intalled as is. Manufacture date was quite recent so I simply installed the filter without adding any further oil.
Also read the post about the air intake which just added further motivation to just install the filter without adding further oil.
Adrian
A note within the box stated that the filter was already oiled (arrived in a sealed plastic cover) and could be intalled as is. Manufacture date was quite recent so I simply installed the filter without adding any further oil.
Also read the post about the air intake which just added further motivation to just install the filter without adding further oil.
Adrian
Pro
Joined: May 2001
Posts: 588
Likes: 0
From: Ashburton, Devon, England
Originally posted by Cuppie
Don't bother with neat litle holes, just try the 'Battenburg' cake approach....
Just two square holes, one lined up with the intake trumpet...
Now have a picture of same, but can't upload it -HELP!!
Melv
Don't bother with neat litle holes, just try the 'Battenburg' cake approach....
Just two square holes, one lined up with the intake trumpet...
Now have a picture of same, but can't upload it -HELP!!
Melv
J
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Michael S. Palmer
Team Owner
Joined: Dec 2002
Posts: 29,309
Likes: 622
From: Just around the corner
Sorry guys, it just sounds like a wet f##t to me!
Oh my!
Thread Starter
Banned
Joined: May 2003
Posts: 775
Likes: 0
From: suffolk,england
Originally posted by Adrian WC
Paul,
A note within the box stated that the filter was already oiled (arrived in a sealed plastic cover) and could be intalled as is. Manufacture date was quite recent so I simply installed the filter without adding any further oil.
Also read the post about the air intake which just added further motivation to just install the filter without adding further oil.
Adrian
Paul,
A note within the box stated that the filter was already oiled (arrived in a sealed plastic cover) and could be intalled as is. Manufacture date was quite recent so I simply installed the filter without adding any further oil.
Also read the post about the air intake which just added further motivation to just install the filter without adding further oil.
Adrian
Paul
C2 cab
Rennlist Member
Joined: Feb 2003
Posts: 1,031
Likes: 120
From: Albuquerque, New Mexico, USA
Finally, after all most three years of ownership, I can now join the perforated airbox cover club. Yipeee! My car now sounds like a Porsche!
Picked up a used cover from a fellow PCA member, and had at it. I did not go the circular hole route though....didn't look right to me, so I went at the cover with a jig saw, and cut out a pretty decent, "L" shaped opening, while leaving the cover pretty much structurally in tact.
I also yanked the snorkel off. It looks kinda-sorta like the cover they have in Performance Products for the 993. Great fun to put the right foot down. And as so many others have observed, you hear nothing different unless you are at about 3/4 throttle. Other than that, no one would ever know.
Can't wait for the next autocross. I am quite sure that the sound alone will be good for 2 seconds a lap on my rivals.
Side note: Is it just me or is removing and reinstalling the air box cover a bit of a PITA? Man its tight. I can't get it in or out without some disfigurement of the K&N filter surface. Even w/o the snorkel, its still a bit of a challenge.
BGL
Picked up a used cover from a fellow PCA member, and had at it. I did not go the circular hole route though....didn't look right to me, so I went at the cover with a jig saw, and cut out a pretty decent, "L" shaped opening, while leaving the cover pretty much structurally in tact.
I also yanked the snorkel off. It looks kinda-sorta like the cover they have in Performance Products for the 993. Great fun to put the right foot down. And as so many others have observed, you hear nothing different unless you are at about 3/4 throttle. Other than that, no one would ever know.
Can't wait for the next autocross. I am quite sure that the sound alone will be good for 2 seconds a lap on my rivals.
Side note: Is it just me or is removing and reinstalling the air box cover a bit of a PITA? Man its tight. I can't get it in or out without some disfigurement of the K&N filter surface. Even w/o the snorkel, its still a bit of a challenge.
BGL
Last edited by BGLeduc; Jul 23, 2004 at 11:22 AM.
2nd Gear
Joined: Mar 2002
Posts: 2
Likes: 0
From: TN
I drilled the airbox which gave it higher pitched throaty sound. Then I was told by a Porsche mechanic and club racer to simply trim the whole right (outside?) side of the airbox off at the corners being careful to leave the section where the flip down latches attach. This gave it a deeper more pleasing sound and leads me to believe that the airbox cover vibrating as air is sucked in caused the higher pitched sound. The duct tape trial may not yield exactly the same sound as the drilled airbox cover. Good Luck!
Rennlist Member
Joined: May 2004
Posts: 531
Likes: 3
From: Lausanne, Switzerland
I did the "duct tape test" late one evening, to try the aural effect of a drilled airbox.
After a short drive, I found myself at the kitchen table in the middle of the night, drilling away at the airbox like my life depended on it....
After a short drive, I found myself at the kitchen table in the middle of the night, drilling away at the airbox like my life depended on it....
Three Wheelin'
Joined: Mar 2003
Posts: 1,385
Likes: 4
From: Cambridge, Canada
Originally Posted by jenskleis
I did the "duct tape test" late one evening, to try the aural effect of a drilled airbox.
After a short drive, I found myself at the kitchen table in the middle of the night, drilling away at the airbox like my life depended on it....
After a short drive, I found myself at the kitchen table in the middle of the night, drilling away at the airbox like my life depended on it....
