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Post by Macrofeet on Feb 16, 2006 14:56:15 GMT
yesterday I noticed there is filter above the fuel valve i'm guessing so the valve dont get clogged
My question is,
The filter between the valve and the carb has anyones gotten dirt build up in it is it to filter the air out also ?
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Post by ally1756 on Feb 16, 2006 15:01:00 GMT
i have the same sort of fuel filter on my kit car, ive seen pics on here and my filter has a sort of rusty deposit in it, it works fine though :S ally
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Post by Macrofeet on Feb 17, 2006 1:20:36 GMT
bump
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Post by ally1756 on Feb 17, 2006 11:00:44 GMT
huh? :s
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Post by hypojam on Feb 17, 2006 11:04:05 GMT
Filter between the fuel valve, i didn't know there was one
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Post by Macrofeet on Feb 17, 2006 13:23:23 GMT
i'm guessing i exspained poorly here it is again hopefully easier to understand
There is a plastic filter on top of the fuel valve to stop crap from the tank clogging the valve, then there is also a filter under the fuel valve and above the carb on the fuel line this filter seems to cause much hassle and i am wondeirng if anyones filter here has gotten dirty mine seems to have stayed clean
i was thinking it would improve fuel flow to remove this filter as the fuel would still be filterd between the tank and carb
so my question is would removing this give the bike to high emmishions or cause any other side effects, if this is the case what is the best type of filter to have does it make any diffrence, they have so called mini moto preformace filters on ebay which would fit our scoots
I replaced my orginal tiny filter with a larger one i'm not having any problems with this but i bet it slows fuel flow at least a tiny amount
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Post by hypojam on Feb 17, 2006 13:37:37 GMT
Probaly best to leave it
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Post by ally1756 on Feb 17, 2006 13:54:40 GMT
yeah if theres no for sure reason to take it out i wouldnt bother aly
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Post by chcknugget on Feb 17, 2006 14:15:18 GMT
It wouldn't affect performance at all... The float in the carburetor is what controls the reservoir of fuel and the fuel flow. You can leave the filter and be happy that your gas is cleaner!
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Post by Macrofeet on Feb 17, 2006 17:16:47 GMT
i'm not to good with this stuff i'm a computer engineer so here is how i see dont worry about telling me if i'm wrong
i'm thinking if the fuel can flow though the filter quickly then it might be more responcive and pull away better
A smaller and more vertical filter is the best set up, fuel can then quickly drain though the gauze when the valve is opened the only draw back is dirt will clog the filter more quickly so it will need to be changed more often
where as a bigger filter with a bigger gauze inside will soak up more fuel before the fuel can pass though it if it is at an incorrrect angle eg level, the fuel may struggle to get past as it will have to fill about 1/2 of the filter before it can escape, the trottle may have to be opend more before you gain power
with no filter the fuel moves freely down the pipe and is not slowed up by the filter but if any dirt gets past the valve into the carb this could really sux
so what you think people
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Post by hypojam on Feb 17, 2006 17:24:36 GMT
The carb only uses small amount of fuel anyways, doesn't mater how easy the fuel runs through the pipes, aslong as the carb has the correct amount of fuel in the float chamber you ain't going to get anymore power by trying to stuff more fuel into it.
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Post by Macrofeet on Feb 17, 2006 17:43:22 GMT
i'm on about getting a better flow of fuel you must get diffrent sized filters for a reason
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Post by cb50j on Feb 17, 2006 20:15:37 GMT
the fuel filter or the one before the valve make absolutely no difference to performance.....as chcknugget says, inside the carb,fuel is kept in a small reservoir and flow beyond is adjusted by a float (similar to the way a lavatory cistern operates) which regulates fuel intake
............... #sprint#
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Post by cb50j on Feb 17, 2006 20:16:34 GMT
other sizes for millions of other applications
................. #sprint#
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Post by ally1756 on Feb 17, 2006 20:52:27 GMT
basically do it if u want to but it wont make any noticable difference ally
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Post by Macrofeet on Feb 28, 2006 19:13:41 GMT
i'm getting what your saying but i'm not 100% sure if you understand what i mean
dont forget i'm trying to get better accel and stability not top end speed i realise it wont make diffrence for top end
i've noticed where you place the filter does make a diffrence to stability cutting the fuel pipes shorter also helped a little
if there is a good flow of water to a toilet it fills and flushes quicker
qt-9 uses quite alot of fuel more then i exspected so saying it uses a tiny amount is not true if you take the fuel line of the bike will die in like 2 secs
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Post by BillyGreen1973 on Feb 28, 2006 19:27:00 GMT
You said the bike died after 2 seconds when the fuel line came off. Try this and you'll see you are getting plenty of fuel flowing quickly enough for the best acceleration.
suck on the vaccuum pipe for the fuel valve, then disconect the fuel line to the carb for 2 seconds, just have a look at how much fuek flows out! thats far more than the bike will ever need!
Removing filters will only let crud get into your engine, also a smaller filter will slow down the flow. Think of it like this you try and get 100 people through a double door at a pub, now try and get 100 people through a single door, it will take longer to get the same amount through a smaller opening!
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Post by Macrofeet on Mar 1, 2006 9:00:32 GMT
okay let me try and exsplain what i mean in a different way
comparison = A big fuel filter with a coffee pot
Say if you could lay a coffee maker on its side and set it going how long before the water gets past same time as when it was vertical? or would it have to fill over 50% before the force and level of water was great enough for the coffee to pass
why is the filter usually above the coffee pot ?
A: it drains quicker (gravity)
comparison = A small fuel filter with a coffee pot
imagine the place where you put the coffee is tiny
it still has to fill 50% but that 50% is much less than on the big filter,
why dont they use small filters on coffee pots ? A: Because it would be hard for the water to get past the coffee
why would you want the water to go past the coffee quicker? A: so you could drink it quicker if you wanted to
what you think people ?
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