More airbox experiments

[mik_str]

Ever true to myself (with an idle brain in this winter season to make this worse.... lol), I started thinking about ways to help my engine to breath better. Since my tuner did not have success in getting it to run properly with a lid-less airbox, I am looking to improve the breathing while keeping the lid. This had led me to two ideas:

i) I will be fitting a spacer to the underside of the (BMC) air filter. I carved up a used OEM Honda filter by cutting out the inside section and just keeping the outer ring. THis will raise the filter (and hence the lid) by about 9mm and, by my calculation, increase the volume by about 0.6 L (will also help the filter to clear the stacks completely as it now rests directly on them; hopefully increase flow a bit). To address the issue of the moulded block-offs now sitting too high, I cut up the OEM filter to retreive the block-offs from it and will install them directly on the lower section (replicating the set-up one uses with a K&N filter and its two rubber block-offs). I will cut out the block-off protrusions from the BVMC filter as they will no longer be needed.

ii) I started looking at ways to let more air in. While easy to do in principle, the issue is dong so without creating excess turbulence in the box and actually harming airflow. So, here is what I have come up with: I picked up an airbox snorkle from an 83 Nighthawk 550 and will be piggybacking it directly on top of the existing snorkel (same width). I will simply enlarge the cut-out in the lid, thereby increasing the area by 50%. My hope is that the incoming airstreams will blend without excess turbulence. As I will have to raise the front of the tank slightly to make room for the spacer, it will create an opening at the front (under the tank) to allow air to enter the upper snorkle.

It if doesn't work out, no problem, I tape it all up or pull out the second (pristine) lid I have.....

[tony.mon]

The other option I had thought about with regard to increasing airbox snorkel intake area was to chop two snorkels up, then fabricate a single, wider one....

Going to dyno, to see if there's any difference to power or jetting needs?

The MWR filter prototypes are apparently on their way, so hopefully evaluation can start soon.

[mik_str]

The other option I had thought about with regard to increasing airbox snorkel intake area was to chop two snorkels up, then fabricate a single, wider one....

I have one (soon to be two) spare snorkel lying around and gave that some thought as well. The main issue there is the fact that there is very little room to work with in so far as the width is concerned (largely due to frame, not to mention needing to retain access to the two front lid securing screws).

Looking forward to seeing how the MWR filters work as that could be the ultimate solution.....