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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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  #61  
Old 12-11-2011, 01:41 AM
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BlackHemI BlackHemI is offline
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Yea the hole is at the bottom of the box so it still travels through the filter
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  #62  
Old 12-11-2011, 10:47 AM
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Yes you are correct, I went out and looked at the airbox again and it would travel through the fliter, my bad, I'm still getting to know Dodge rams, sorry and thanks for answering.
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  #63  
Old 12-11-2011, 11:15 AM
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no problem man, you should look into this, a great mod for 30$ is not bad and it really gets true cold air in
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  #64  
Old 12-11-2011, 11:46 AM
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I definitely will, I live at home depot lol. I'm a big fan of cheap mods such as this one and I will put the airbox vents on as well (I was a former MX racer for 25 years, we always did these mods) Thanks for the tip.
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  #65  
Old 12-11-2011, 11:57 AM
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sweet post pics of it when completed!
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  #66  
Old 12-16-2011, 07:38 PM
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Again, thanks to jmr for coming up with what is definitely an inexpensive airbox mod that would seem to yield a benefit under any logical assessment.

I had already installed the K&N filter for the OEM box. I did the 3" hole saw deal but used some RV sewer parts for the hose and 3" airbox hole...3" is standard size stuff for RV sewer lines and fittings. I liked the longer snout on the airbox hose connector, so it was easier to slip on the 3" sewer hose and clamp it to the fitting. It was a tight, press-fit for the airbox fitting. I was going to seal it with some foam or silicone, but it fits way tighter than that OEM air inlet just above it. Apparently since you're on the dirty side of the filter, it's not a big deal, and I doubt much hot engine bay air is going in the airbox.

I used a 2 foot length of flexible sewer hose and installed a 3" PVC downspout connector at the end. I toyed with the idea of making a ram air setup by cutting a hole in the fake grill area, but I don't think there's much gain in this application. I ziptied the downspout connector to a convenient location over to the right side, as low as possible without having to worry about it hitting anything by running over something.

It's not much different than jmr's setup but just uses different materials.
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  #67  
Old 12-16-2011, 10:33 PM
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TNC that looks like a really good installation and I'm happy to help out fellow RAM owners.

The mod works, try putting your hand over the inlet end of the 3" tubing when the engine is running and you'll feel the air going into the engine.
This tells me that the original 3.5" x 4" snorkel in the airbox from the factory isn't a big enough inlet for the engine.

You know I found some 4" flexible aluminum tubing near the 3" tubing at Lowes. So now I'm wondering if 4" would fit in the area where I drilled the 3" hole or maybe run another 3" piece of tubing to the airbox. More AIR!!!!

I've been running this setup for over 3,000 miles and have only noticed very small debris such as pieces of leaves and a couple insects on the bottom of the airbox but nothing in the filter itself. If somebody is really worried they could fit some furnace filter material or something similar into the 3" tubing to trap the debris.
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Last edited by jmr; 12-16-2011 at 10:47 PM.
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  #68  
Old 12-16-2011, 11:24 PM
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LOL!...yeah, I've thought about the dual 3" inlet deal too. I even looked at a 4" PVC downspout fitting that would work at the airbox by making the airbox hole rectangular and then use 4" hose all the way. But you know what?...I think this current 3" hole probably adds all the engine needs with the OEM sized high flow filter and the OEM inlet. With the airbox and borla muffler exhaust mod, I think this truck has to be hitting at least 400 hp. Frankly that's enough for me at this point. The exhaust and intake mods have provided some noticeable seat-of-the-pants boost for a really small investment.
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  #69  
Old 12-17-2011, 12:24 AM
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Anyone have more performance data on this? Would be a great project once I get some free time.
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  #70  
Old 12-17-2011, 01:26 AM
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Quote:
Originally Posted by bmax1985 View Post
Anyone have more performance data on this? Would be a great project once I get some free time.
I'm pretty sure no one has done a dyno test on this setup. What would really be neat to see would be some kind of flow bench test where you could compare this modded OEM box and K&N setup to one or more aftermarket CAI setups. I'd suspect the aftermarket setup to be better, but it's possible that one of those may not achieve full potential without headers and a super low restrictive exhaust system. Anyway, all of it is speculation without comprehensive testing. On the other hand, it's just about a given that most stock engines yield some kind of noticeable performance improvement with a decent intake and exhaust modification.
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