K&N, BMC, Green, filters, which one?

[elevensies]

K&N, BMC, Green, filters, which one?

looking to fir a replacement filter, iv ran BMC in the past and really like them, but they like others dont always work for the best.

its not a performance thing for me, its more a slightly better induction roar, and the fact they dont need replacing

so whos got what. amd recommendations please

ohh its off in a 3lt sport coupe

 

[nfbr]

From tests that I've done on all three in the past
- Green cotton ones having a "painted" mild steel mesh overlay went rusty.
- The BMC ones let the most amount of dust and were the least efficient at filtration.
- K&N came out on top in terms of Pleated cotton gauze filters.

Out of the Foam Filters
- RamAir passed the most dust
- Pipercross were better at filtration but are historically well known for the rubber gasket splitting and separating
- ITG came out on top for Quality and filtration.

 

[csl1973]

For me I believe that the oe airbox with the paper filter would be the best. I've heard stories of the oil getting on to the maf sensor and clogging it up and ends up rough running. But it's up to you if you want a good quality induction system, what about the davef kit?? Or a similar type.

 

[Mike6]

+1 on keeping it standard. To much air and the engine will think its calling for more fuel - these things on injected engines are finely balanced but certainly change the filter at regular intervals to stop it clogging up.

 

[elevensies]

im actually a big fan of stock panel filters, i dont really do the replacement ones, but i just wanted a better sound from the unit rather than anything else

 

[nfbr]

I've heard stories of the oil getting on to the maf sensor and clogging it up and ends up rough running.

This has been myth busted many times over! The only time you ever get this issue is when A) people absolutely saturate the filter in Oil, or B) people oil both sides.

+1 on keeping it standard. To much air and the engine will think its calling for more fuel - these things on injected engines are finely balanced but certainly change the filter at regular intervals to stop it clogging up.

Modern engine / ECU setups have dozens of sensors looking at everything from how much air is coming in, to ambient air temperature, ambient air pressure, inlet pressure, inlet air temperature even what's coming out the other side with the various lambda/oxygen sensors to constantly refine how much and when fuel is injected into the engine.

It's not some fine balance that you're going to mess up with a performance filter. You could run the damn car with no air filter at all and it would still be able to calculate exactly what to do to get the perfect air:fuel mixture going into the engine.

That would be older cars with carburettors, where you have one fuel jet setting and if it's not ideal, then it's tough titties.

My Source: Well over a decade of experience in the performance tuning and Motorsport industry.

 

[patriot66]

I've heard stories of the oil getting on to the maf sensor and clogging it up and ends up rough running.

This has been myth busted many times over! The only time you ever get this issue is when A) people absolutely saturate the filter in Oil, or B) people oil both sides.

+1 on keeping it standard. To much air and the engine will think its calling for more fuel - these things on injected engines are finely balanced but certainly change the filter at regular intervals to stop it clogging up.

Modern engine / ECU setups have dozens of sensors looking at everything from how much air is coming in, to ambient air temperature, ambient air pressure, inlet pressure, inlet air temperature even what's coming out the other side with the various lambda/oxygen sensors to constantly refine how much and when fuel is injected into the engine.

It's not some fine balance that you're going to mess up with a performance filter. You could run the damn car with no air filter at all and it would still be able to calculate exactly what to do to get the perfect air:fuel mixture going into the engine.

That would be older cars with carburettors, where you have one fuel jet setting and if it's not ideal, then it's tough titties.

My Source: Well over a decade of experience in the performance tuning and Motorsport industry.

+1