Threeweight wrote:
Anyway, I was just curious if anyone has tried transplanting a bigger or more efficient airbox into a CRD Liberty.
To answer your original question, we did have a thread on this. I agree that this is important.
1) Some folks tried one of those after-market, epossed cones to replace the airbox (which just take in engine compartment air). The cones have poor particulate filtering properties and were generally nixed as an option on those grounds first, second on the fact that you don't get tons of airflow into the engine compartment. The do get more air in, though.
2) We looked for bigger vehicle airboxes and filters that might fit. No one found one, there isn't much space. Keep looking, though.
3) The snorkle guys say they are getting better airflow to the existing box. They aren't getting much more air, IMO, unless they decide to put a big cone funnel up there and route the snorkle closer and somewhere forward of the airbox, instead of the convoluted route they have making the air go forward a long way then back into the box. Long tube slow down air (there is a "friction"). Probably does reduce dirt intake and help when fording streams.
4) We talked about building an airbox to fit in the (limited) space. I thought I was a genius because I was came up with a weird patterned box that would allow the use of 2 standard filters. But it would have been a PITA to build and change the filters. The better, more elegant, and obvious (to everyone but ME

) solution was a better filter with twice the surface area which...
5) Amsoil makes a filter with almost twice the surface area, which fits in (either) aibox and should give increased flow. Probably the easiest and most effective.
I'd still like to see a big big airbox, but unless it is mounted outside the Jeep, there just isn't room.
I'm still listening for ideas...join the hunt.