|
A cold air intake only helps you get more air into your engine at wide open throttle, at cruising speed it is going to give the engine more air then it needs and thus the engine is going to dump in more gas then it needs.
Your exhaust pipe and muffler are not a duct to get the exhaust to the back of the car, larger is not better, people who say it's best to go a step bigger are bad at math as the exhaust flow in your exhaust system is coming out of the engine in pulses, there for the exhaust system needs to be tuned for those pulses, again if you are running wide open all the time that is going to shift to a larger pipe but at normal driving speeds to large of an exhaust pipe is going to de-tune your engine and make it work harder.
For your long drives you might look in to smoothing out the underside of your car.
|