So the 5.2 forum has a lot of talk about removing the air silencers from the throttle body (http://www.ramforumz.com/showthread.php?t=46431
). I was a little skeptical, but after thinking about it, it couldn't hurt anything so I decided I should do it.
I took off my air hat and was surprised at how tall the silencers were. After seeing that, I began to think that there might be some legitimacy behind this. It was easily 1/4 - 1/3 of the total clearance between the top of the TB and the bottom of the hat.
So I whipped out my trusty dremel tool and hacked away...and hacked...and hacked. The port and starboard sides are thick. I ate through 6 cutting wheels.
After I put it all back together, I must say I was impressed. For a free mod, my throttle response was better and there's a nice sucking sound while at idle. The butt dyno felt a some more power and the torque seemed to hit a little lower on the RPM gauge.
Overall, I'd attribute this mod as about twice what you feel with a K&N filter on a stock intake. As we all know, mods compound each other, and I have quite a few mods already. So your mileage may vary.
A couple of pointers to you if you take this on (and I personally suggest it!)
-WEAR SAFETY GLASSES. Aluminum filings are not fun in the eyes
-Remove the IAC, MAP, and TPS. I've got a shiny new IAC where my dumbass knicked the IAC with my dremel tool.
-Belevel the sharp edges leading into the butterfly valves. This'll prevent a low pressure spot right at the edge of the valves
-Use Mother's aluminum and mag polish. If nothing else, you've already got it apart. Clean it!
-Taper the hard valley between the butterfly valves. This'll help air flowing across by removing 2 more low pressure zones
-Don't try and cut all the way through the silencers...this'll take forever. Cut about 15% out on both sides, groove the front and the back of it, and then take a pair of pliers to just break it off. You're going to have to sand it anyways and this'll save a load of time.
-Clean the entire TB top to bottom. It should be shiny...not black. You know who you are
-Don't touch the butterfly valves with the dremel. They have a very tight tolerance.
-Incase you skipped over number 1: WEAR SAFETY GLASSES
And the pics - these are after I was done. The 5.2 posting has a good before shot.
And everything I cut off: