DIY Ram Cold Air Intake on 3rd Gen CTD

[Diesel_Dave]

Update: Last Friday I drove over an hour in a moderately heavy rain (with the intake wide open). I thought it would be a good oportunity to open my airbox up and inspect things. It's been 3,000 miles since I installed it.

The air filter was only very slightly damp-barely noticeable to the touch. So I'm reasonably confident that the water is staying out. Also, the air filter visually seems to be in the same shape it was 3,000 miles ago, so it doesn't appear like I'm picking up any more dirt. Also, my pre-filter looked clean too, so I haven't been picking up much debris.

Overall, I'm pretty satisfied.

[slowmover]

Taken from an article on TDR [TurboDieselRegister] from a September press review of the 2013 DODGE Ram:

" . . Diesel-equipped Ram Heavy Duty pickups feature an industry-exclusive Ram Active air intake system, activated by new monitoring capabilities added to the engine controller. When the intake system senses extreme heat, it draws cool air from the front of the vehicle—a function that also engages at high altitudes for superior throttle response in low oxygen environments. When conditions are wet from snow, ice or water fording, the system pulls air from the standard/conventional underhood inlet, clear from snow packing and water ingestion."

1] Intake flow path changes for high heat
2] Intake flow path changes for wet conditions
3] Intake flow path changes for oxygen percentage reduction

Slick!!


INTRODUCING THE NEW 2013 RAM HEAVY DUTY TRUCKS

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[Diesel_Dave]

Interesting! I couldn't find any more details yet, but I guess is the "second" air path is similar to what I made. Guess I was one step ahead of them

[oil pan 4]

What do you believe the gain was for your rammed air intake?
I want to use your data for a CAI/rammed air ecomodder wiki for diesels.

Don't want people thinking they should be putting a warm air or hot air intake on their diesels for FE.

[Diesel_Dave]

Originally Posted by oil pan 4

What do you believe the gain was for your rammed air intake?
I want to use your data for a CAI/rammed air ecomodder wiki for diesels.

Don't want people thinking they should be putting a warm air or hot air intake on their diesels for FE.

I still haven't gotten around to doing any A-B-A testing, but I still agree with what I posted earlier:

As far as the FE numbers, I think there is an advantage. My average of the last ~600 miles with the ram CAI installed, I've averaged 50.28 mpg on the overhead. This is a 4.1% improvement over 48.29 mpg for the previous 600 miles. Both periods had similar tempeatures (79 deg F avg temp). I don't think it's fair, however, to ascribe the whole 4.1% improvement to the intake. Recently, I've really racheted up the hypermiling intensity in an effort to break the single tank range record. If I had to guess, I'd say probably 1% FE improvement from the intake, but it's hard to say much of anything definitative about such small differences.

[ron]

the cold air setup( Ram air) I built for my (gas) techoma added 4mpg until the computer added the fuel back in. what I can say is that at 35mph I can drive on the flat and maintain that speed with no gas pedal. If the gain is 1-2% for TCD Im in

[slowmover]

Came across a bit yesterday, that FE falls off for TD's at 125F intake. Wish I could remember where (ha!)

[oil pan 4]

We now have a ram air wiki for diesels.
Check it out and let me know if any of your info needs to be changed.

http://ecomodder.com/wiki/index.php/...ir_and_Ram_Air

[Diesel_Dave]

The wiki says my time was only about 1 hour. I didn't time it, and I did it in multiple stages, but it took quite a bit longer than that. Actual work time was probably 2-3 hours, but you'd need a couple more hours to let RTV set up.

Also, you put down that I saw a 4.1% improvement from the intake. While I did see a 4.1% improvement, I was also changing some other things at the same time. I'd only feel comfortable quoting 1-2% improvement from the intake itself.

[oil pan 4]

No problem.