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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #141  
Old 03-13-2012, 08:17 PM
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If it's 4" tube don't use a flange just feed the pipe into the bottom of the airbox. The aluminum tube can easily be formed so it's possible to make a compact short radius elbow from it.

I've done this for other cars my Caliber where this isn't much room under the hood.
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  #142  
Old 03-13-2012, 09:59 PM
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Thanks guys, I'll tackle it again this weekend. This is my 3rd, 3rd gen Dodge PU. My '04 and '06 were diesels. I wasn't pulling trailers any longer so I bought the Hemi. I've left it rock stock until a couple weeks ago starting with a Diablo Sport tuner and this minor mod. to the air box with a K & N. Some kind of Mangnaflow system next.
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  #143  
Old 03-13-2012, 11:12 PM
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Ya, I learned to look at the users truck info. Saves some head scratching.

me...
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  #144  
Old 03-13-2012, 11:34 PM
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Nice information here I will be doing something like this and the pictures and info in here are great. I'm wondering if anyone has found an alternative to the drain/dryer vent that isn't ridged? I've been looking around but anything I've found is pricy so it defeats the whole purpose.

I'm in the industrial electrical industry and have access to conduit and benders and I am thinking about custom bending something. I haven't removed my airbox to look at the routing yet but does anyone have any insight as to if it would be possible to get a solid peice routed down there?
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  #145  
Old 03-13-2012, 11:35 PM
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ohh I would be using 3" conduit if that makes a difference
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  #146  
Old 03-14-2012, 12:05 AM
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But what about that 4" hole I drilled??
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  #147  
Old 03-14-2012, 12:07 AM
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Quote:
Originally Posted by mccritter View Post
Nice information here I will be doing something like this and the pictures and info in here are great. I'm wondering if anyone has found an alternative to the drain/dryer vent that isn't ridged? I've been looking around but anything I've found is pricy so it defeats the whole purpose.

I'm in the industrial electrical industry and have access to conduit and benders and I am thinking about custom bending something. I haven't removed my airbox to look at the routing yet but does anyone have any insight as to if it would be possible to get a solid peice routed down there?
I think the concern for the ribbed interior in this portion of the intake may be overrated. You're looking for more volume, and I don't think the intake flow really starts accelerating until it's reduced down at the throttle body intake tube from the airbox to the TB. Sure, there's some noticeable flow at both intake holes, but I don't think the ribs at this point are much of a hinderance, if any. There's been some discussion about the OEM ribbed throttle body tube, and this may have more credence. The flow is accelerating much more here just due to the reduction in intake diameter...like at a carb venturi. I'd want to see a flow bench test to absolutely confirm that, but it has more logic associated with it. All the aftermarket TB tubes appear to be smooth, so it's either because it's easier to make them that way...it really does improve/perserve flow...or both.
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  #148  
Old 03-14-2012, 12:23 AM
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Has anyone tried to form a pipe? I was looking at my vent tube from day one. How can I replace that with something nicer. I don't meant to say the pipe as it is looks bad. It has a great industrial feel to it.

I would really like to build a pipe that runs all the way to the hole in the front bumper trim I will need to make. I think it can be done as one piece. Or maybe a couple more manageable sections.

Maybe fiberglass? Cast something?? Hmmmm, how would dip work?? Dip is going to take on the contour of every bump?? or will it kinda level out some imperfections? Would the 4" tube I have now show smooth or ribbed for my baby's pleasure??

Lord, I'd like to apologize for .....

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  #149  
Old 03-14-2012, 08:43 AM
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It is true that ribbed tube vs smooth tube actually makes very little(almost negligable, actually) difference on an intake. I've seen both flow testing and dyno comparisons.
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  #150  
Old 03-14-2012, 09:22 AM
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Quote:
Originally Posted by hwy97 View Post
Now I see most of these have been done to 4th gen's. I punched a 4" in the bottom of my '07's air box, it looked like it would clear no problem. It's a problem...I ended up just having a very short straight intake because of the short distance between the bottom of the air box to the top of the plastic inner fender. I not going to cut up the inner fender and even past that issue it's tight between the inner fender above the upper control area to get an intake tube to a better air supply. I had found a cool piece of plastic gutter drain that went from 4" round to a flat 2" x 6" flat that would have fit perfect between the space in front of the upper control arm but the 4" round wouldn't fit between the bottom of the air box and the inner fender. In the pic's it looks like not only is there more room under the air box, but more room to run a intake hose


Well damn, I could have swore that I posted in this thread a while back. Anyways, here's an excerpt from my small build thread, I did this last year, I really think it helps collect air into the tube, and it looks much better to me personally.


"Finally, I was in the hardware store a few weeks ago and ran across some expanded steel, so I got an idea. A couple months ago I removed the plastic trim piece in my bumper and added an aluminum register with three inch flex pipe than ran up to my air filter. I did this to get some more cool air forced up into my air filter obviously. I've seen a few guys do this, but instead of just leaving the end of the tube down there, I figured if I added the register I would probably be able to collect a little more air. If you don't know, a register is a piece of aluminum in a rectangle that transitions into an outlet for a tube. I'm rambling. Long story short, I didn't like the big opening left in my bumper. At first I thought it looked 'tough', but kinda got over it. So, I needed something to cover this somewhat, but still allow air to flow through. So the expanded steel was perfect. Lowe's didn't have anything longer than 24 inches, and my opening was 48 inches wide. I cut it in half, used metal zip ties to secure it to the top, which you can't even see, and then some sticky butyl-type matting I had. It wasn't very hard, it was cheap, and I love the end result. So with with that being said, here come the pictures..


Here you can see the black part in the bumper between the two fog lights, this is what I pulled out and where I ran the tube from my airbox down to:




The opening in my bumper after I pulled out the black plastic part:





In this one you can see the register(I painted it black):





ACTION SHOT!:

[IMG][/IMG]


End result:




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