stock air box mod????
01-19-2010 | 08:01 PM
#18
Registered User
Joined: Dec 2009
Posts: 189
Likes: 3
From: Ohio
I am always so surprised to read these air-box mod threads.
Given the size of the opening on the stock box (see pic' below) compared to the rest of the (3") intake tract, and the fact that the stock inlet goes through the fender and directly to the front grille... It is hard to imagine that opening the bottom of the airbox (swiss cheese or HomeDepot style) to the low pressure & HOT area under the truck can provide an improvement in flow or IAT. Especially for those of us in the sub-600 category In addition, while realize that the chance of water or debris getting in there is slim, it's not worth the risk especially when the factory system is as good as it is.
I AM inspired by ThunderRoad's scientific approach to measuring the difference! I am curious to know if those measurements were taken while driving or on a dyno' ??
I have a manometer too (plus new and old style air filters and a spare airbox) and I'm going to put a port in the lid of my airbox and run a few comparisons while driving. Will post the results here when I am done.
Cheers
-Mark
Given the size of the opening on the stock box (see pic' below) compared to the rest of the (3") intake tract, and the fact that the stock inlet goes through the fender and directly to the front grille... It is hard to imagine that opening the bottom of the airbox (swiss cheese or HomeDepot style) to the low pressure & HOT area under the truck can provide an improvement in flow or IAT. Especially for those of us in the sub-600 category In addition, while realize that the chance of water or debris getting in there is slim, it's not worth the risk especially when the factory system is as good as it is.
I AM inspired by ThunderRoad's scientific approach to measuring the difference! I am curious to know if those measurements were taken while driving or on a dyno' ??
I have a manometer too (plus new and old style air filters and a spare airbox) and I'm going to put a port in the lid of my airbox and run a few comparisons while driving. Will post the results here when I am done.
Cheers
-Mark
01-19-2010 | 08:31 PM
#19
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Joined: Jan 2007
Posts: 156
Likes: 2
From: Bay Area, California
01-19-2010 | 08:54 PM
#20
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Joined: Dec 2009
Posts: 189
Likes: 3
From: Ohio
My two cents worth: If you are modding your stock airbox in such a way that you increase the possibility of getting any amount of water in it (like the swiss cheese approach I did), you may want to stay away from any flat-panel style air filter. A conical filter like the K&N or others should be more forgiving of a little water. When filters get wet, they stop flowing easily. It's not hard to find pics around here of someone who got theirs wet and it sucked the filter into the intake tube (or worse, into the turbo). The conical-style filters should be stronger (just assumption here) based on their shape and extra surface area.
01-19-2010 | 09:40 PM
#21
Registered User
Joined: Dec 2009
Posts: 189
Likes: 3
From: Ohio
I am always so surprised to read these air-box mod threads.
Given the size of the opening on the stock box (see pic' below) compared to the rest of the (3") intake tract, and the fact that the stock inlet goes through the fender and directly to the front grille... It is hard to imagine that opening the bottom of the airbox (swiss cheese or HomeDepot style) to the low pressure & HOT area under the truck can provide an improvement in flow or IAT. Especially for those of us in the sub-600 category In addition, while realize that the chance of water or debris getting in there is slim, it's not worth the risk especially when the factory system is as good as it is.
I AM inspired by ThunderRoad's scientific approach to measuring the difference! I am curious to know if those measurements were taken while driving or on a dyno' ??
I have a manometer too (plus new and old style air filters and a spare airbox) and I'm going to put a port in the lid of my airbox and run a few comparisons while driving. Will post the results here when I am done.
Cheers
-Mark
Given the size of the opening on the stock box (see pic' below) compared to the rest of the (3") intake tract, and the fact that the stock inlet goes through the fender and directly to the front grille... It is hard to imagine that opening the bottom of the airbox (swiss cheese or HomeDepot style) to the low pressure & HOT area under the truck can provide an improvement in flow or IAT. Especially for those of us in the sub-600 category In addition, while realize that the chance of water or debris getting in there is slim, it's not worth the risk especially when the factory system is as good as it is.
I AM inspired by ThunderRoad's scientific approach to measuring the difference! I am curious to know if those measurements were taken while driving or on a dyno' ??
I have a manometer too (plus new and old style air filters and a spare airbox) and I'm going to put a port in the lid of my airbox and run a few comparisons while driving. Will post the results here when I am done.
Cheers
-Mark
The opening in your box looks to be the same as mine.
01-19-2010 | 11:01 PM
#22
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Joined: Jan 2009
Posts: 26
Likes: 0
From: Millerstown PA
I can tell you that one of the first things I did was to open up the sides of the stock air box, drop in a K&N filter and ditch the muffler. These simple steps really woke up the engine. I noticed an immediate difference in responsiveness and power.
01-20-2010 | 12:20 AM
#23
Registered User
Joined: Jan 2007
Posts: 156
Likes: 2
From: Bay Area, California
As I mentioned before, I'll be measuring the pressure in the upper part of the airbox... after the air filter. I'll build an adapter so that I can plumb into the filter-minder port.
Cheers
-Mark
01-20-2010 | 07:01 AM
#25
Registered User
Joined: Oct 2002
Posts: 7,543
Likes: 4
From: Tomball, Texas
I am always so surprised to read these air-box mod threads.
Given the size of the opening on the stock box (see pic' below) compared to the rest of the (3") intake tract, and the fact that the stock inlet goes through the fender and directly to the front grille... It is hard to imagine that opening the bottom of the airbox (swiss cheese or HomeDepot style) to the low pressure & HOT area under the truck can provide an improvement in flow or IAT. Especially for those of us in the sub-600 category In addition, while realize that the chance of water or debris getting in there is slim, it's not worth the risk especially when the factory system is as good as it is.
I AM inspired by ThunderRoad's scientific approach to measuring the difference! I am curious to know if those measurements were taken while driving or on a dyno' ??
I have a manometer too (plus new and old style air filters and a spare airbox) and I'm going to put a port in the lid of my airbox and run a few comparisons while driving. Will post the results here when I am done.
Cheers
-Mark
Given the size of the opening on the stock box (see pic' below) compared to the rest of the (3") intake tract, and the fact that the stock inlet goes through the fender and directly to the front grille... It is hard to imagine that opening the bottom of the airbox (swiss cheese or HomeDepot style) to the low pressure & HOT area under the truck can provide an improvement in flow or IAT. Especially for those of us in the sub-600 category In addition, while realize that the chance of water or debris getting in there is slim, it's not worth the risk especially when the factory system is as good as it is.
I AM inspired by ThunderRoad's scientific approach to measuring the difference! I am curious to know if those measurements were taken while driving or on a dyno' ??
I have a manometer too (plus new and old style air filters and a spare airbox) and I'm going to put a port in the lid of my airbox and run a few comparisons while driving. Will post the results here when I am done.
Cheers
-Mark
MikeyB
01-20-2010 | 08:30 AM
#26
Registered User
Joined: Apr 2005
Posts: 412
Likes: 0
From: Minden, NV
I run a swiss cheesed airbox and the big k&n filter. The only way water will get in there is if the airbox was submerged.
I've been using the k&n product on diesel trucks since 2001. Take a guess at how many times I had a problem with water or dust getting into my motor.
Here's the one I use now.
http://www.knfilters.com/search/prod...px?Prod=E-0776
I've been using the k&n product on diesel trucks since 2001. Take a guess at how many times I had a problem with water or dust getting into my motor.
Here's the one I use now.
http://www.knfilters.com/search/prod...px?Prod=E-0776
01-20-2010 | 08:56 AM
#27
Registered User
Joined: Jan 2006
Posts: 3,443
Likes: 39
From: San Diego
Hopefully you kept your muffler. Emission tests are coming. Paul Fox @ Defiant Truck Products installed a Shuttleworth HD diesel muffler in mine. Throatier sound w/no drone inside and flows much better.
01-20-2010 | 03:33 PM
#29
Registered User
Joined: Dec 2009
Posts: 189
Likes: 3
From: Ohio
Ok thanks ThunderRoad, that is helpful! Can you tell me where (exactly) the measurements were taken... did you drill a hole in the lower box? or was the hose from your gauge placed in the fender?
As I mentioned before, I'll be measuring the pressure in the upper part of the airbox... after the air filter. I'll build an adapter so that I can plumb into the filter-minder port.
Cheers
-Mark
As I mentioned before, I'll be measuring the pressure in the upper part of the airbox... after the air filter. I'll build an adapter so that I can plumb into the filter-minder port.
Cheers
-Mark