air box filter vs. lunchbox filter....
I want my GS to run as smooth and as much power as possible this year...
are the 2 filters very different?...I know that the lunchbox have 20% more air flow...but it's dirtier...
but if i jet it correctly...will I gain more power from the lunchbox?
how bout fuel mileage?
I dont think lunch box is dirtier than airbox K&N ... The Lunch box flows more of course but most of the flow resistance is in the airbox. The bike can run smooth either way ... just need to jet it accordingly. I say if you're getting rid of the paper or UNI filter which IMHO is the cleanest Yea a 2 way tie ... then might as well take it to the max...
Cool.
Srinath.
Are you running a stock or aftermarket exhaust? If you have an aftermarket, then go with the lunchbox filter.
Most anytime you increase power by increasing gas flow, you will decrease gas mileage.
I'll have the wileyco exhaust...
Sorry. New to all of this and need some clarification. What is a lunchbox and airbox? I know what the air filter is, but can't figure out your terminology with the other 2 things.
It can be confusing.
The bike comes stock with an airbox...basically a big black box that sits under the tank and has a filter that sticks into it. You can either use the stock paper air filter in the airbox or buy a K&N filter that fits in place of the stock filter in the airbox.
The other option is to remove the big black box under the tank all together and install the lunchbox filter which is a single filter that attaches directly to both carbs at once... Hmm, now that I wrote this all it occurred to me that Kerry probably has pics....Hmmm....let me see what I can dig up.
:cheers:
Quote from: DomKerry probably has pics....
Nope - best I can do here is my
K&N Stock Replacement Air Filter page. I don't have any pics of airbox-less setups. But I'm pretty sure
somebody around here does.
Let us review all of your options:
1)Stock airbox with stock filter.
2)Stock airbox with K&N filter.
3)K&N lunchbox(ru-2970) with airbox removed.
4)K&N pods(individual filters for each carb) with airbox removed, as you will see below.
(http://onfinite.com/libraries/175798/841.jpg)
These pod filters are unusually large(for pods) and I can neither provide you their K&N part # or the # for the filters that other people have used on a GS. These are just some filters that I had for a kart that I was able to squeeze in there, but I havn't had any problems with them.
:cheers:
Quote2)Stock airbox with K&N filter.
3)K&N lunchbox(ru-2970) with airbox removed.
Do you know what the K&N model number is for the filter to be used with the stock airbox?
Does anyone at all have a picture of what the lunchbox looks like compared to the airbox?
Also, is it as simple as just installing any one of these filter replacements in or is there further tweaking of other things to get your GS to run smoothly?
I might be mistaken, but I think you have to rejet even with K&N in the airbox... But IMHO with a WileyCo you may as well go for it and get the lunchbox or pods. You are going to have to rejet for the WileyCo anyways.
:cheers:
Quote from: Dom
These pod filters are unusually large(for pods) and I can neither provide you their K&N part # or the # for the filters that other people have used on a GS. These are just some filters that I had for a kart that I was able to squeeze in there, but I havn't had any problems with them.
:cheers:
Havent had any problems ... Other than the fact they look like crap and well barely fit ... hell no ... :lol:
Cool.
Srinath.
Quote from: seshadri_srinath
Havent had any problems ... Other than the fact they look like crap and well barely fit ... hell no ... :lol:
Cool.
Srinath.
Wow, thanks... :roll:
That's actually the first thing I show people when they come over to my house for dinner..."Hey, how would you like to see my hack K&N job?...Let me just remove the tank...it'll only take 10 minutes...."
Your just jealous... 8)
Shut up ... I have some similar too except mine aren't crumpled and bent and they aren't this long or tapered either ... Cylindrical and stright and a bit shorter ... Your's are going to be more visible I think being bent down and that far back ... Mine are barely visible with the side panels and seat on ... just get a whiff of the bottom side of these ...
Cool.
Srinath.
Fight! Fight! I'd actually love to see pictures of what a clean install would look like. It might make me go that was instead of the lunchbox install.
Sounds like Srinath is having a case of the Mondays... :lol:
but atleast he dosen't wear pink and red tights. even though he had his ears pierced like a little girl....
Quote from: roguegeekQuote2)Stock airbox with K&N filter.
Do you know what the K&N model number is for the filter to be used with the stock airbox?
Follow the link in my previous post. :roll:
I have NOT rejetted with the K&N in the airbox, but then I live up at 4800 feet where the air is a bit thinner. :dunno:
Here is an extremely related question that Dom may be able to answer:
Wileyco installed AND and K & N filter in the stock airbox.
#40 pilot, 125 main, #4 washer, and 3 turns. . . some eye of newt, and one large toad.
No?
can someone tell me what I should buy to rejet?
2 scenarios...
03 carb (canadian)
Wileyco slipon
K&N airbox filter
03 carb (canadian)
Wileyco slipon
K&N lunchbox filter
Quote from: Jake DHere is an extremely related question that Dom may be able to answer:
Wileyco installed AND and K & N filter in the stock airbox.
#40 pilot, 125 main, #4 washer, and 3 turns. . . some eye of newt, and one large toad.
No?
I would go with larger mains .. 127.5's maybe?(... but srinath is the one who can probably tell you best.)
Ditto. Ditto to Frost's question. Except my carbs had graduated from high school before his were born. And their favorite song was "Welcome to the Jungle" if that gives you any hints.
There's a table in the "How To" section that tells what you need for each combination. It's in one of the rejetting threads.
Even better. It is at my fingertips whenever I need it. :cheers:
um....where is it? :?
Here:
http://www.gstwins.com/forum/viewtopic.php?t=12929
:dunno: What size main`s jet,do i need for a UK bike.
Have k&n in airbox.Will i need any washers under needle.?
And do i need to fiddle with the air screw,? if so how many turns out.
My bike holds back a bit,but is ok when i open her up..
:cheers: Tony Uk
1). I am concerned that the lunchbox filters would become soaked in a hard rain (certainly a hard sustained rain), anyone have any experience with them in the rain?
2). Has anyone ordered from www.usdieselparts.com? The part number appears to be K&N but they don't say that it is:
http://www.usdieselparts.com/moreinfo.cfm?Product_ID=53843
Thanks. Jess
Mine don't get wet even though they are exposed to the elements, not wet enough to make my bike run crappy, at least...and it rains alot where I live...maybe you've heard...
Quote from: jessright1). I am concerned that the lunchbox filters would become soaked in a hard rain (certainly a hard sustained rain), anyone have any experience with them in the rain?
2). Has anyone ordered from www.usdieselparts.com? The part number appears to be K&N but they don't say that it is:
http://www.usdieselparts.com/moreinfo.cfm?Product_ID=53843
Thanks. Jess
I bought from them. Good service and quick shipping. Of course that is K&N part number and the item is K&N.
Cool.
Srinath.
LOL... thanks! If You were from anywhere else i would still wonder.... Hmmm... come to think of it, i still am... have you ever ridden in the rain all day?
I may tour a little this summer on the GS...
And thanks, for the thumbs up about usdieselparts Srinath... i will order from them if i can decide lunchbox or not...
Thanks, J
No, I havn't yet ridden all day in the rain but it should repel a good amount of water just because they are soaked in oil which for centuries has been a common method of repelling water. You might have heard of oilskins... rainwear usually made in Australia which is usually cotton cloth soaked in oil. Same principle should apply to your filter. Just make sure you buy some of the K&N filter oil and give it a good dousing.
There is a certain amount of suction or air passing through the air filter area though (K&N lunchbox)... ...I think a great amont.
Consequently, I am thinking an all day ride in the rain could create an issue... anyone ever have a problem as such?
Not that I've heard. :dunno:
Yea he's right water makes no difference ... Your K&N's actually get very little and they are not much affected ... once the motor gets hot it will run just fine with some water in the air ... That's what humidity is ...
Cool.
Srinath.
Well, i am sure we can agree that water in the engine would be a big problem. We can also agree that water is humidity, or rather, that relative humidity is the amout of water that air can hold at it's saturation temperature expressed as a percentage.
When the engine is hot... it could perhaps change the state of said water to steam... but that removes alot of heat in the process (from the engine). It's all dependant on the amount of water we are talking about...
I am just wondering if anyone has any personal experiences of negative consequences.
I count two at least that don't. :mrgreen:
Thanks, Jess
I know it's recommended that you re-jet after you install the drop in K&N filter, but is it absolutely necessary? From what K&N says, if I leave the air restrictor on the filter, I don't have to re-jet at all. What's the negative side to not re-jetting? Thoughts?
stock GS is lean...with a K&N...even with the restrictor...it'll make it even leaner...restrictor restricts some air flow...but still not good enough...
and also...you're talkign about a airbox dropin filter here...not a pod...
you SHOULD be fine without rejet...but it's recommanded...
Jessright - I recomend you look for posts by our elite member KevinC ... Lots of experience with Motors, races a GS, has great knowledge about aircraft and many other types of engines ... water injection is a special favorite of his ... and he's made many posts about pouring water into a running engine ...
Rougegeek - K&N is already on a fine line by saying you dont have to rejet with their restrictor ... I'd say a stock bike has to be rejetted ... They want to sell more and their choker has helped it work in that capacity. Being rich helps the bike run cooler and makes it last longer. No reason you dont want to do it at the first possible time.
Cool.
Srinath.
QuoteNo reason you dont want to do it at the first possible time.
Alright. I'm gonna do it. Just read over the whole process and on paper, it doesn't seem too bad. For the people who have done it, is it kind of a delicate process? Is there absolutely no room for error? I'm not too hands on with these kind of things so is it even safe to me to try it? Any thoughts are much appreciated. Thanx.
Quote from: seshadri_srinathJessright - I recomend you look for posts by our elite member KevinC ... Lots of experience with Motors, races a GS, has great knowledge about aircraft and many other types of engines ... water injection is a special favorite of his ... and he's made many posts about pouring water into a running engine ...
Rougegeek - K&N is already on a fine line by saying you dont have to rejet with their restrictor ... I'd say a stock bike has to be rejetted ... They want to sell more and their choker has helped it work in that capacity. Being rich helps the bike run cooler and makes it last longer. No reason you dont want to do it at the first possible time.
Cool.
Srinath.
Thanks, I will check it out.
OK, I parked my bike outside Friday night in the rain and rode all day yesterday in the rain with no problems performance wise to speak of.
Another measure you could take for protection from the rain could be a precharger, which is fine plastic mesh shower cap looking thing that you stretch over the filter. I remember someone saying that they couldn't find one specifically for the lunchbox(ru-2970), but you could always call K&N. That's actually what the precharger is made for, keeping excess dirt and water out of the filter on vehicles where the carbs are exposed.