I have been considering two modifications to my 2003 Dodge R3500 Diesel. It
is a 5-speed. I already have an Edge EZ power chip in the truck. What I am
considering is installing one of those cold air intake systems. I think it
costs around $300 for the system.
The second thing I am considering is changing out the muffler to a full
flow-through (no baffles). The muffler costs around $80.
Does anyone have any experience with either the cold air intake or the full
flow muffler? Any positives? Any negatives.
In general, you'll notice slightly lower EGT's, and a little faster spool-up
of the turbo - both good things.
I would recommend you look at the Scotty Ram Air 3 intake. I used to run
this on my truck (had to get rid of it when I went to different turbos,
unfortunately - I really liked that intake). It's available from Diesel
Power Products, http://www.dieselpowerproducts.com/air1
The two-stage foam filter that the Scotty uses offers better filtration than
the cotton-gauze type filters of most other intakes.
I would run from anything that said 'Fram' on it... the Scotty system is
developed by a guy that actually uses (some would say abuses :) his truck,
and it's ONLY designed for the Ram - not some generic filter that can be
sold to any truck owner with a change in piping. It produces the coolest
air to the turbo, because it's completely sealed off from the engine
compartment. It takes air from the stock location (inner fender panel), as
well as a ram air through the front grill. It's plastic housing is a better
insulator from engine heat than a metal heat shield.
As I said, I used to run one of these, and my oil analysis results confirmed
that the filter was doing it's job (not to mention the spotless intake
I was looking at the Scotty III. I did not do a thorough read through, but
is the Scotty III all that is needed or do I have to purchase extra parts,
such as the hoses that are shown? Purchasing the Scotty III comes complete
The Scotty 3 is all you need - it's a direct replacement for the stock
airbox. That other hose they show is nice, as it eliminates the baffled
stock intake hose (which is designed for noise suppression, not necessarily
optimum airflow), but it's certainly not required.
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