Howdy T-Bear,T-Bear wrote:Brains a going'
1. Assuming a fan/housing would be mounted around the horn area...
Any need in front of the fan for a moisture filter to sort out water/rain being pushed in? The more moisture kept out of the timing cap area the the better I'd say. Any thoughts on moisture in that timing/Hall Sensor area?
The first fan I pulled up says its waterproof rated. But I'd assume a pre-filter would prolong - but add that additional length/profile that may not be easy to position. For the price, these fans may be a yearly consumable depending upon climate.
Or could we assume the rain/moisture would be pushed out by the fan with a basic hole/drain output?
2. Or a fan/housing mounted some were protected and perhaps rear facing to limit rain intake? Where might this be?
Water or any debris will in short order kill or mess up any sort of electronics but a speck of dust or a drop of water will INSTANTLY stop a Power-Arc or C5 ignition as they use an optical disk, water or dust on that disk and its game over until you do whatever is nessisary to clean the disk. So in my opinion if you have a Power-Arc or C5, ignition and your going to be doing ANYTHING that could possibly allow water or debris into the ignition cup you would be wise to filter as well as possible any intake or exhaust opening you make in the cup.
This brings us back to air flow, the fan being discussed will flow 200CFM ( Cubic Feet of air per Minute ) under unrestricted ideal conditions, anything you do that will restrict air flow will have a diminishing affect on actual air flow. Adding a intake filter will restrict flow, the size of the intake opening and the size-length of the path will restrict flow, the same can be said for the exhaust. This is why in reality in my earlier posts I estimated that when all is said and done a system using a 200CFM fan would in the real world considering all the restrictions that would be incurred when building a system to work on our Ural's would probably provide about 50CFM of actual flow, still a considerable amount of air to be passed through an other wise CLOSED ignition cup.