wyoramsrt-10 said:
You said you had about 7k miles on the filter right? I hear the K&N will perform a little better with some dirt on it than it would if you just cleaned it.
Thats what I have seen also, from a filtering point of view.
I don't know if that is the best for air flow.
I have never done a clean vs dirty test on a flow bench, or seen the results of such a test, and don't know of anyone that has.
The Viper car & trucks use a speed density system to control timing and fuel flow.
This system does not measure air flow like the systems that use a MAF Mass Air Flow sensor. GM and Ford as well as many others use a MAF so the computer knows how much air is going in the motor. And adjusts fuel flow based on air flow, along with temperature (intake and coolant), rpm and vacuum.
The speed densiy systems use, temperature (intake and coolant) rpm and vacuum.
This is at wide open throttle, in open loop.
In closed loop (cruising at part throttle or normal driving) the O2 sensors are also used to keep the mixture close to " stoiciometric" which is 14.7 to 1 air to fuel ratio. That is the ideal air fuel ratio for complete combustion. This is an over simplified explination, but is basicly how it works.
Anybody know if this might be an issue ? How dirty can an oiled gauze filter (K&N type) be before it starts to affect performance by becoming restrictive.