Airbox vs Pod filters ????

[Clarke673]

Ok so I must choose to make my own custom air box or just use two k&n air filters. They would be mounted to my carbs.

Some reasons I have heard for using an air box over just a filter is that you will have an excess air supply. You use the excess amount of air for when you are cruising along and you just punch the throttle. So the air inside the box is used to get the engine going and then it starts to pull more air through the filters obviously being slightly restricted compared to just pulling in air with no resistance.

Another benefit to having an air box is that the filters will be drawing air farther away from the engine meaning less steam and heat being pulled in.

Im not sure what I should do so any opinions on the matter would greatly be appreciated!

 

[DragonFreak]

i had this problem with my Pro X. I put a 800 in the 440 chassis and it was really tight. Everyone told me i should run the air box. They say with pod filters you will pull all your air from under the hood which is hot air. With the air box you will get air from outside. This way you will be pulling cold air instead of hot air. IMO i would go the air box route.

 

[nathaniel11]

like stated above running a pod type filter pulls in warm air from under your hood. and with your airbox u are pulling in cold air.

with drawing in warm air your motor will lose power.
cold air = happy motor

 

[NoSecondChances]

.....

Another benefit to having an air box is that the filters will be drawing air farther away from the engine meaning less steam and heat being pulled in.
......

I may disagree with that statement. Read this thread and the linked ones to see how you can make a cold air intake. With positive (higher) pressure around the pods at anything faster than a fast running speed, I don't have a problem with extra air in the airbox being used to get the motor going until it starts pulling. If there is a ram air effect, that theory doesn't apply due to the pressure differential.
http://www.snowest.com/forum/showthread.php?t=108816

Hope that helps. Pods do work, not for every sled and not for every setup, but take time to tune them right and you will see the difference.

 

[Scott]

I think there was a good thread about this earlier this week.

 

[Clarke673]

I was looking at it and i am going to run pods for now and make my own airbox out of clear plastic and i am going to pull air through a side panel. I will run the tube up right above my clutches and pull air from the top of the hood. I will just use SLP snow screen and then i will put some sort of filter in the tube going down. Making it out of plastic so its easy to clean, lightweight and if i wreck and smash it, plastic debris won't blow my engine up like aluminum debris.

 

[sled_guy]

The problem is not warm or cold air, it's that air from under the hood can be wildly varying in temperature. Take your typical mountain sled out in the boonies on a nice day. You come across the flat meadow at 30-40mph and there is good air flow through the vents and across the engine. Temps are pretty consistant at temp XXX degrees under the hood. You're dialed for those temps on your jetting and the machine is running great.

Then you hit the base of the hill and head up... snow is deep, ground speed starts to drop and by the time you are in to the nice grind way up on the hill your ground speed is no more than a good running pace and the motor is working really hard. Now heat is building under the hood, and the air the pods are pulling in is going up fast in temperature, 30-40-70 degrees or more because there is little to no air flow through the hood.

Now the well tuned sled is sucking 50 degree warmer air and it stumbles on it's face.

Or the opposite is tuned for, so it runs on the hill at slow ground speeds and you squeak it while ripping across the meadow at 30mph.

Having an airbox reduces those variations and makes it easier to dial in and keep dialed in.

sled_guy

 

[rynokron]

Mesh hood helps alot if you want to run pods. Keeps clutches cooler too.

 

[go high fast]

custom airbox is easier said than done. I have trashed more than a few.

Pod are the way to go especially in spring riding when the hood comes off anyway. for powder riding you'll need some addtional venting to the engine compartment that will stay clear.

 

[Wheel House Motorsports]

do like the guys dide with the radiator hose, custom airbox is harder than it seems.

got any pictures of the engine compartment?? i though i saw them in a thread you posted... if you even rock some short extensions to get the pods above the motor some decent ventign and it will do fine when moving at all.

after looking at the pics in your other thread i bet you could run pods straight up and maybe just run fog lights and put the pods behind the light openeing, or just vent things good up top and she would get some good airflow. you can make custom air lines out of PVC, but it looks kinda hoopty.

 

[icr]

when ppl run NOS it freezes the air before entiering the carbs thus creating more horsepower

Hmmmm...no

 

[Wheel House Motorsports]

wait, you forgot you cain freeze air?? jeez you some sorta tard?!?!hahahah

but i think we all know how nitrous does cool it, but i leave it at that, no need to be obnoxious.

 

[Clarke673]

do like the guys dide with the radiator hose, custom airbox is harder than it seems.

got any pictures of the engine compartment?? i though i saw them in a thread you posted... if you even rock some short extensions to get the pods above the motor some decent ventign and it will do fine when moving at all.

after looking at the pics in your other thread i bet you could run pods straight up and maybe just run fog lights and put the pods behind the light openeing, or just vent things good up top and she would get some good airflow. you can make custom air lines out of PVC, but it looks kinda hoopty.

I think i might just run it strait up. Im running pre mix so i don't have to worry about my oil tank being in the way now. I might just run it up and over to the PTO side more and make it draw air from just the PTO side headlight and cut out a custom vent on the side of my hood. I can't pull from the mag side because the exhaust goes right there and i can't go strait up because i have a custom aluminum bracket ware the tach should be and i have a headlight im mounting there. I will mount a tach off of the handle bars.

Thanks for all the input guys. One question.... How should i filter the air? Just run a big pod at the very top or what?

This is ware i will probably make my vents. I made these vents in the last picture and they work great and only take about an hour to make.

 

[Wheel House Motorsports]

just route them both as high as you can with radiator hose, then run pods on each hose.

 

[sled_guy]

but i think we all know how nitrous does cool it, but i leave it at that, no need to be obnoxious.

That's not why NOS makes more power. NOS has twice as much oxygen per molecule.

sled_guy

 

[383lb800]

Been there don't that. . .I ran just pods. . .noticeable power loss. . .tried the radiator hose trick with the pods up out of engine compartment. . .even more power loss. . .ran open carbs the rest of that season. . .then. ..built my world famous home depo air box. . .gained enough rpm to add two grams of clutch weight. . .never had a carb freeze issue since. . .

 

[Clarke673]

Pics please! i am looking for ideas. How should i filter the air?

 

[89sandman]

just get enough venting in through the hood and the pods will be just fine. make sure you do some kind of screen coverage to keep the snow from getting under your hood and creating steam. this works fine at least on the M series...

 

[rev440alaska]

what ive used in the past with success is speaker cover mesh right over the carbs. it doesnt freeze up

 

[Clarke673]

That won't filter anything. I need something to block dirt, mettle, and organic objects that are small.