Turbo Filters - Plugging

[Spur]

I have had this problem forever with my BD setup and I am going to try and put the intake screen right on the turbo and get rid of the snorkel all together. In deep snow the snorkel gets covered in snow and then the sled will stall right out. I will put a screen kit over the hole in the side panel and suck from under the hood. Have a look at the intake screen that Custom Turbo Werx has for the doo kit. Hotter intake air potentially going to be any concern???

This has been tried and retried. The turbo intake hole can not pull enough air. This is hard to understand until you have tired it. Believe me, if BD could have drawn enough air without making the snorkel stick up out of the hood they would have done it. I have tried, or guys I ride with have tried every possible way of getting air from under the hood. There is a reason BD, Alpine, MCX and all the other good kits have a way to pull cold air from outside.

This is evidently a much bigger deal on the 4 strokes than the 2 strokes?

The two best solutions we have found are making the foam prefilter. This seems to work well and allows you to break the ice off as it build up. If you do this you will need to make a new external filter as the BD one will not fit over snorkel with the prefilter on there. The other thing that works on the BD kit is to extend the snorkel about 8 to 12 inches. A majority of the snow hitting the snorkel is from the skis. Raising the snorkel 8 inches seems to allow a majority of this snow to hit the extension and keeps it off the snorkel. It looks stupid, but works effectively. From my experience this is a problem with all kits in the deep powder regardless of where the intake is located. I tired to get BD to design an extendable snorkel for deep powder days but they were already out of the 4 stroke scene.

 

[ryan7]

Its not the ice causing the problem though. In deep snow the intake just plugs off with the fine snow and when you let off the snow falls off. It is a pain chopping the throttle all the time to keep the intake clear.

Does anyone have a solution for this??

 

[boosted metal]

I built a stainless air filter, similar to cr's.Curved a half shield w a full top to face forward towards wind.The bottom was tigged at the shield.Shield sits 2 '' away from the intake and allows the snow screen to slip over and no problems in deep fluffy snow and recieve air 360 around the cannister.Wanted to build to sell but have no time so here's the answer .Ill try to post pics

 

[JeremyFisher]

I've caught interest in the conversation guys, I however do not have a turbed Yamaha nor a four stroke but I am running into the same darn problems with my filters. I run a 01 summit, built up motor with a mesh hood.

Last year I had KickAss filters on my rack with snow filters around them. In heavy snow conditions I would get a HUGE bog and loss of air. Come to find out the filters were letting moisture through. When I'd stall out, I'd pull the filters off and I had a build up of ice in the venturi of the carb. I actually had to run back to the hotel in Cooke and rip down my carbs on the bathromm sink and do a quick clean out. Well now I reaplaced both pistons and a replate of my cylinders because the moisture scored the intake side of my pistons; lovely.

I plan to try K&N filters with a better pre-filter. I am now going to install some pet screen under portions of my meshed hood in order to try to keep snow out. I am debating to slightly oil the filter and hope for the best.

All I know is yes it sucked to drop the money on a rebuild but it really sucked to have to watch all your buddy's ride the deep pow while you sat. Not Happy.

I will keep in research for this fix. But as some of you suggest or have seen, the steam sounds like a contribution to the problem.

 

[julio]

Almost forgot, Apparently if you paint the metal cage (if yours is not already painted) the bit of ice on the prefilter won't stickto the cage.

it will still collect ice, mine is powder coated and collects ice.

To make the screen I just used window screen and a piece of pipe that fit inside the intake tube. used glue on the tube stretched the screen over it and taped it to the outside of the pipe. then clamped the outside of the intake tube to the pipe. then drilled a 1/8 inch hole in the lowest point of the intake tube to allow the water to drain when you stop and the ice melts.
this still doesnt fix the iceing just gives you a guard to help protect your turbo. To reduce ice the only effective thing is to extend the intake tube to get the intake away from the heat of the turbo.

 

[ryan7]

I built a stainless air filter, similar to cr's.Curved a half shield w a full top to face forward towards wind.The bottom was tigged at the shield.Shield sits 2 '' away from the intake and allows the snow screen to slip over and no problems in deep fluffy snow and recieve air 360 around the cannister.Wanted to build to sell but have no time so here's the answer .Ill try to post pics

Can you send me some pictures of this please.

 

[Spur]

Its not the ice causing the problem though. In deep snow the intake just plugs off with the fine snow and when you let off the snow falls off. It is a pain chopping the throttle all the time to keep the intake clear.

Does anyone have a solution for this??

Sounds to me like your having problems getting air just because your snorkel is in the powder.

I expected this to be a problem for me when I first started riding my BD. I always expected the motor to go rich when I dumped my snorkel into the powder. However, I don't have a problem with this. My snorkel seems to pull enough air through the powder that I don't feel any power reduction. I have pulled some long side hills with my snorkel completely buried expecting to go rich and wondering how I was getting air to the motor. I finally came to the conclusion that the intake side of the turbo sucks hard enough to pull air thru a lot of powder??? I have ran in some pretty dense snow thinking there was no way my snorkel could pull air thru it but have never had a problem.

Are you running the BD snorkel with the BD pre filter? Just wondering if your snorkel has big enough holes in it? I know a guy who had problems with this but found out his home made snorkel did not have big enough holes to pull air while under the snow. Found out real fast why BD snorkel has the size holes it has.

I have also ran in powder that was so deep even the stock sleds could not get air. Everybody's sled ran like crap. In those conditions the Apex with the external air snorkel seem to work the best cause you could get them up and on top of the snow and keep them there under boost long enough to get from point A to point B???

 

[twsandrew]

The only thing I have seen work for the side mount BD intake is an extension for deep days. It looked dorky but worked well. The impulse and rear mount intakes seem fine. I agree with the fact that the turbo can pull through the powder it is the ice on the screen and the snow sticking to that. Mine has pulled hard with big boost and good afr through a long pull in real deep snow with powder hitting it the hole way. As soon as I stopped and it could start to ice it immediately would have issues