Thread: Need more fresh air?
01-10-2007, 09:42 AM #1
Need more fresh air?
I know there have been numerous discussions on how to drill holes in your bucket and hollow out the visor (and other ideas). Well I decided to try one I haven't seen yet. Inside the hull, I removed all of the vent tubing. Outside, I removed my cowlings and the black plastic fairings underneath. I trimmed the plastic fairings where the cowlings have openings. (I think Phillip has detailed instructions on this). I then added some water resistant material (same as a pre filter) over the OEM black intake and secured it with some silicone and a zip tie.
Next was the part I was nervous to do. I cut additional holes in the hull (using a roto zip). I installed a prototype cover made from some closeout snowmobile pre filters I found on Ebay. I bolted them in place using self locking nuts. Reinstalled the fairings and cowlings and that was it. I would guess a total of $30-$35 bucks total investment.
Now to test it out....
01-10-2007, 10:55 AM #2
That's one heck of a project. Hope it pays off - let us know.
01-10-2007, 11:31 AM #3
Bill, I don't run with the black piece under my hood either. If I thought I needed more air, I would cut that black round piece (where the tubes all hook up to), in the front area to direct flow better into the hull. I've sumbermerged my gpr a few times now and haven't seen any water in my hull thats worth worrying about. I don't have any prefilters on those black round things either. You are just restricting air flow now.
01-10-2007, 11:37 AM #4
The project ski that I bought didnt have ANY of the fresh air ducting in it but I am planning on making "scoops" like shooter is talking about to put where the black inlets are that you are talking about. Hopefully this will draw in more cool air. I will not have the air boxes under the cowlings either.
01-10-2007, 03:25 PM #5
you really don't need a scoop either, just cut the front part of that black piece out and leave the backside, that will work just as a scoop.
You would really need to submerge your ski underwater for quite some time before you would actually draw too much water in through that hole. Hell, even yamaha didn't have a screen over that hole. But if you want that piece of mind, thats your choice, your still restricting air more than you did before.
01-10-2007, 03:43 PM #6
Shooter, I agree with you but the ski I bought doesnt have the black "boots" or whatever you want to call them so I am going to try to make the scoops for it. I might just leave it open for a while intil I get real energetic with the PVC and fiberglass.
01-10-2007, 05:00 PM #7
Do you really think it hurts airflow? Especially since I added much more?
01-10-2007, 05:11 PM #8
You added more holes but then you are restricting it with the pre-filters. If you have aftermarket flame arresters on a ski and you have the pre-filters or outerwears or whatever you want to call them you can rev the engine and watch it suck the prefilters up to the f/a's. It is a restriction.
01-10-2007, 05:24 PM #9
01-10-2007, 05:26 PM #10
Think of it this way. If you took every strand of material in the prefilters, and placed them side by side to make a solid sheet with no holes in it and covered the air inlets, that is how much air you are blocking. Maybe that will help you understand. Some time I need pictures like this in my head to help understand some things.
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