6.9 diesel
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
There are several guys here that have hooked ram air up to the intake snorkel on the stock air cleaner housing with good results.
I am assuming you are looking at something like this,
Airaid Intake Systems - SummitRacing.com
With that filter setup, you won't gain anything over the stock filter housing with the intake tube pulled off the intake.
Hot air from inside the engine bay is not going to help any.
I ran that intake I posted above hooked to the stock air cleaner housing before I had a turbo/turbo air cleaner housing, just eliminated the plastic tube down to the small original intake opening.
This picture was after the turbo install, but notice the stock black plastic air tube connecting the air cleaner box to the intake elbow.
I am assuming you are looking at something like this,
Airaid Intake Systems - SummitRacing.com
With that filter setup, you won't gain anything over the stock filter housing with the intake tube pulled off the intake.
Hot air from inside the engine bay is not going to help any.
I ran that intake I posted above hooked to the stock air cleaner housing before I had a turbo/turbo air cleaner housing, just eliminated the plastic tube down to the small original intake opening.
This picture was after the turbo install, but notice the stock black plastic air tube connecting the air cleaner box to the intake elbow.
Elder User
Joined: Jan 2008
Posts: 825
Likes: 2
From: SW Washington coast
I have been pondering the intake question also ... My idea is to make a few adapter rings so that I can stack 3 air filters on top of each other and have this stick thru a hole in the hood ... Maybe cover the hole with a scoop ...
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
I don't really like any intake that has a path straight down into the engine.
Water runs downhill under it's own power.
On a 6.9 you are taking 52.5 cubic inches and squeezing it down into 2 cubic inches on the compression stroke.
2.5 cubic inches of fluid in a cylinder means it will hydrolock and severe engine damage may be the end result.
Water runs downhill under it's own power.
On a 6.9 you are taking 52.5 cubic inches and squeezing it down into 2 cubic inches on the compression stroke.
2.5 cubic inches of fluid in a cylinder means it will hydrolock and severe engine damage may be the end result.
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Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
I wish I saved the rods out of the last Detroit I had apart. It inhaled water and end result were 2 severely bent rods and 2 blown out lower cylinder walls. Good thing it's wet sleeved. 2 piston sets and liners and it's still running.
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