M1100EVO Home Brew Air Filter Mod (cheap MWR copy)

[oldndumb]

Pics of my air filter after copying the MWR design. Filter material is UNI green foam. Main filter cage is 1/4" screening.

The front part removes the stock air guide/resonator and adds two new inlet holes.

Then I pondered the MWR design for the main filter element replacement and could not comprehend why their frame was on the interior of the foam. Not being smart enough to understand their concept, I made my frame to be on the outside of the foam filter element. Since the screen frame has an overlapping joint and a separate bottom I used soldered copper wire to secure them.

The most difficult part of it was cutting the foam, as obviously seen in several spots. Xacto, as well as several scissors did not produce smooth cuts. I was hesitant to use a hot wire so I accepted the less than smooth edges. Pliobond was the adhesive recommended by UNI.

Friends riding with me claim they can hear the intake, but it is not been noticeable to me. Very obvious that it leaned out the mixture by comparing Auto Tune trim tables. Two rides and it is still listing fairly large trims needed even though I have the max trim allowed at 20%.

More air and fuel is a happy thing for me. 

Not suggesting that anyone do similar, but if they do, a re-map will definitely be needed.

[ungeheuer]

I like to read about the antics of fellow Autotuners 

When your Autotune settles on a "final" trim for this setup it'll be interesting to hear how much extra fuel it dials up to meet the greater volume of incoming air.

It has to be developing better power.  Noticeable? 

[oldndumb]

Antics is the correct term 'cause she was running fine before. The first Auto Tune trim really was a major improvement. But, I have never accepted stock induction systems on my cars or bikes so I decided to do something about this one also, then saw the MWR kit and thought, easy peasey. 

First run, I took it easy and did a remap. Then did two more long runs. She definitely is running better according to my SOPD.  I started her before re-installing the side panels and placed my hand in front of the filters and could actually feel the air flow. Not a high degree of flow, but definitely felt.

On all of the runs after the filter mod, I noticed that she seemed ready to stall with abrupt throttle closures. I took a look at the idle AFR and they were about 15.5 and 17.0 respectively. The PCV came with no AFR values in the cells at 1250 and 1500 so I entered 13.8 and will see how she likes that tomorrow. My initial concern was fouling the plugs, but I think that I am flowing so much air it should not be a problem. Seems to idle smoother, but that may be my overactive imagination.

Do I recommend doing this? Not really, but it can't hurt so long as one understands remapping will be necessary. Will it add to your grin factor? Yes, and if the induction sound at +4K doesn't make you grin, much less the performance increase, sell the bike 'cause you are too mature and sensible for it. 

[koko64]

 
Looking forward to updates on your progress.