Air Silencer Removal 4.6L

[scotttisha]

Today I replaced the airfilter with a K&N and removed the "no suck tube". Back pressure on down shifting was greatly reduced which I enjoyed. I'm sure the air/fuel ratio has changed but my initial response was very positive. I feel I have more hp on acceleration. Possibly a 3-5 hp increase-- A dyno would confirm. It's a very economic fix for more hp with little or no engine warranty consequences. This makes this car a true BMW beater or better yet... raper.

I don't think this will change your air/fuel ratio....The ratio is pretty much set by the ECU to run at a set rate, depending on how much air is being introduced for combustion. Technically, the only way to change the air/fuel ratio is through the ECU or a device that will trick the ECU.

Most cars are designed to run a little rich, since it's safer for the engine. A lot of aftermarket tuners will go in and tweak the air/fuel mixture to run leaner, but still safe, to gain a few more hp. Too lean=too hot, which=engine go bye bye.

Scott