Air filter

[bombsquad83]

this is what i run , the filter on the left is a gs oem filter and the one on the right is a suzuki GSX 1400 filter ,if it will look after a 106 HP four it will certanly be large enough for a 500 and the beauty is it will fit straight into a standard airbox absolutly no modifications required.I like the standard airbox because it supports the carburettors best .Also i did vacuem tests on the airbox and found no vacuem issues with the standadr filter which proved the factory got it right.I only tried the GSX1400 filter because i was changing one.

Twinrat, do you notice a difference in performance with this filter?  Are you running any leaner?  If so, then I like this solution...per Phil B, it should allow more air to flow without sacrificing air quality.

[twinrat]

definitly an improvement and in answer to your Q YES leaner ,this is what started me on my quest to get this bike performing as it should . i will post on here all the mods i have done ,timing sparkplugs ,vacuem tanks exhaust mods  and carburation settings once ive done the mixture and timing again now i have modded the original exhaust .the engine wil rev cleanly to 10500 rpm  but is still lean by the spark plugs

[Phil B]

Great info. I added a mention of it to
http://wiki.gstwins.com/index.php?n=Upgrades.AirFilter

Any comparison info related to the others on that page would be appreciated.

[bombsquad83]

That's cool.  I already have a pair of 127.5 mains that I could swap out my 125's for.  I might have to try this sometime next year.

[Phil B]

.... i will post on here all the mods i have done ,timing sparkplugs ,vacuem tanks exhaust mods  and carburation settings once ive done the mixture and timing again now i have modded the original exhaust

Nuts. side comment: would have been nice to have a stock exhaust comparison

[twinrat]

will try and find some one locally to do an acceleration test against .Any one out there in NAPIER HASTINGS WAIPUKARU who has a standard gs500  and willing to do an acceleration test  , or maybe i should post and others who have them can compare times. i have standard gearing.

[ghostrider_23]

TwinRat,

Do you have a part number for that filter GSX1400 or should I ask for a filter that fits a GSX1400???

[twocool]

will try and find some one locally to do an acceleration test against .Any one out there in NAPIER HASTINGS WAIPUKARU who has a standard gs500  and willing to do an acceleration test  , or maybe i should post and others who have them can compare times. i have standard gearing.

Your bike VS another bike is not fair test........too many other variables.....

Fair test is your bike against your bike....with and without mods....on same day...

Better yet...just enjoy...

Cookie

[twinrat]

ghostrider

the number i have on a label is 13780-42F01  but just check that its NOT   the standard gs 500 number.

TWOCOOL
i know you mean well by wanting a comparison of how the bike was and how it is now, but the mods without a
dyno means you have to work through the tuning variables one at a time and i started on this project before i found this great forum.

[twocool]

ghostrider

the number i have on a label is 13780-42F01  but just check that its NOT   the standard gs 500 number.

TWOCOOL
i know you mean well by wanting a comparison of how the bike was and how it is now, but the mods without a
dyno means you have to work through the tuning variables one at a time and i started on this project before i found this great forum.

Yes, I understand....so make your mods...and enjoy...making mods is something that some like do do....you don't really need any specific data to justify....just mod for the fun of it!


Cookie

[comradeiggy]

Just a bit of info here - using a larger air filter of any given material will not increase airflow, all other things being equal. To increase flow it has to have less resistance. What it will do, though, is that since it has a larger surface area, it will get less clogged up, so over time it will provide less resistance as it gets older than a smaller filter.

[Phil B]

Just a bit of info here - using a larger air filter of any given material will not increase airflow, all other things being equal. To increase flow it has to have less resistance. What it will do, though, is that since it has a larger surface area, it will get less clogged up ...

"larger surface area" *does* usually mean "less resistance", all other things being equal.

that's why high efficiency air filters have more ripples than low efficiency ones. It gives them more surface area than a "flat" piece of material.
high efficiency air filters usually have a slower flow-through rate. If they had the same surface area, they would be allowing less air flow than the same sized low efficiency filter.
(note that "efficiency" in this context means "amount of contaminates filtered out")


When a material X allows air through at the rate of "y cubic foot per minute", that is based on an implied "*per square inch*" or some other commonly understood standard surface area of material.

Actual rate of flow through the filter (if the air ductwork isnt holding things up), can be properly calculated by
the flow rate of the filter material, x surface area of filter actually available for air to flow through.

[twocool]

Just a bit of info here - using a larger air filter of any given material will not increase airflow, all other things being equal. To increase flow it has to have less resistance. What it will do, though, is that since it has a larger surface area, it will get less clogged up ...

"larger surface area" *does* usually mean "less resistance", all other things being equal.

that's why high efficiency air filters have more ripples than low efficiency ones. It gives them more surface area than a "flat" piece of material.
high efficiency air filters usually have a slower flow-through rate. If they had the same surface area, they would be allowing less air flow than the same sized low efficiency filter.
(note that "efficiency" in this context means "amount of contaminates filtered out")


When a material X allows air through at the rate of "y cubic foot per minute", that is based on an implied "*per square inch*" or some other commonly understood standard surface area of material.

Actual rate of flow through the filter (if the air ductwork isnt holding things up), can be properly calculated by
the flow rate of the filter material, x surface area of filter actually available for air to flow through.

Yes....

Another way to look at it:

If you had a particular filter, which would pass say, 100 Cubic feet of air per minute.......then TWO of those filters could pass 200 CF/m!  So could one filter which is twice a large........

But.....If you engine is pumping 100 CF/m......using a twice as big filter..will still only pass 100 CF/m...

Cookie