air silencer removed: best gas mileage yet!

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Robert Sayre

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Mar 16, 2006
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A week ago I removed the air silencer from the air box. I also drilled a 1.5 inch hole about 1/2 way down on the fender side of the box just for good measure. My theory was that I wouldn't see or notice any appreciable change to the truck around town, execpt for maybe a slight difference in sound. I figure a modification like this probably doesn't have as much impact at local/city driving, but would have some effect at sustained highway speed.



This weekend I drove to Michigan and back, 244 miles. I got 20.6mpg round trip! Best mileage to date was 19.6. So the initial evidence shows it might have had an effect. A few more longer trips are needed to show more convincing proof. This is the first time in a few years I've driven that far without the family in the truck, so I was a little lighter. Has anyone else experienced that? I also was really expecting no difference in local drving, but I think it's more responsive and less sluggish at stoplights and just general driving. Of course, knowing that I changed something makes me question if I'm really feeling it or if I'm just thinking I do because I know I changed something.



Anybody else notice any changes from this mod? Anybody have hard evidence (repeated mpg rpts) that show this effect?

--Bob
 
After taking out the silencer, and maybe enlarging the diameter of the intake hole, is there a way to get the cooler air into the box from the area that the silencer drew air from? Like a stealthy CAI?
 
Eltee,,also take the plastic baffle out form behind the headlight. It will open up more cool air area..
 
The best milage gain I ever got was putting on the KKM intake and replacing the exhaust with a Gibson cat back. Once you allow the engine to get more air it makes a big difference.
 
There is a lot you can do in the calibration to increase MPG as well.





But in the end the biggest factor is your right foot.







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Mr. Torrie R. McPhail - (Owner)

http://www.FastPartsNetwork.com

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I read the project on removing the silencer without taking the box out because for the life of me i could not get the box out anyway and i was unable to pull the silencer out. I even banged on it with a hammer and it didnt budge. Looks like the box has to be removed to get the silencer out. Any suggestions?
 
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