Northy
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| posted on 28/2/04 at 12:49 PM |
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Fuel tank breather?
What do people do with the breather pipe from the fuel tank? Does it need a one way valve? Or just a pipe to let it breath to air?
Cheers
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing! 
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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theconrodkid
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| posted on 28/2/04 at 12:55 PM |
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best to have a one way valve,my tank used to empty over a week in the summer with evaperation
who cares who wins
pass the pork pies
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jonti
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| posted on 28/2/04 at 01:58 PM |
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Don't you need a two way valve to allow for expansion on a hot day ?
OFROK
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Surrey Dave
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| posted on 28/2/04 at 01:59 PM |
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Isn't a 2 way valve , just an open breather pipe?
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theconrodkid
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| posted on 28/2/04 at 02:39 PM |
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hold on dave ill get my calculater out
who cares who wins
pass the pork pies
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CairB
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| posted on 28/2/04 at 05:45 PM |
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Northy,
I used the valve off the Sierra filler assembly. A vent pipe was connected to the top of the fuel tank then up in a loop as high as possible then down
to the Sierra valve then to atmosphere. From memory, I think that the valve would shut off when upside down but otherwise give free breathing both
ways.
I haven't noticed any problems...but I haven't tested it by rolling the car.
Surrey Dave,
[Quote]
Isn't a 2 way valve , just an open breather pipe?
[Quote]
Not necessarily. It could be implemented using 2 check valves in parallel facing opposite ways. This would mean that it would seal in both directions
unless the cracking pressure was exceeded in either direction.
Cheers,
Colin
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Northy
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| posted on 29/2/04 at 08:53 AM |
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Now I'm really confused
Is there any requirement for SVA?
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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Surrey Dave
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| posted on 2/3/04 at 10:02 PM |
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You what!!
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Northy
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| posted on 2/3/04 at 10:07 PM |
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Dave I was just about to reply to this thread!
I phoned Beverly to ask the SVA guy there, and he says he's not bothered at all. Wouldn't even be checked.
So, am I best off fitting a one way valve to avoid evaperation? If so where can I get a Locost one? I'm not prepared to pay Demon Twats prices
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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wicket
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| posted on 2/3/04 at 10:26 PM |
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Graham
Here's another source
http://www.bsr-aerotek.com/fuel18.htm
Eric
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Jon Ison
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| posted on 2/3/04 at 10:28 PM |
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valve out of a push bike, cheap as chips.
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Northy
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| posted on 2/3/04 at 10:35 PM |
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Push bike? Are you serious? What valve?
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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JoelP
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| posted on 2/3/04 at 10:42 PM |
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inner tube one i guess. makes sense actually!
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Northy
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| posted on 2/3/04 at 10:57 PM |
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quote:
Originally posted by JoelP
makes sense actually!
Not to me!
Can you explain how you'd use it?
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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Jon Ison
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| posted on 2/3/04 at 10:59 PM |
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yup inner tube valve, works just fine, even sufficient to get by scrutineering for off road events...........
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Northy
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| posted on 2/3/04 at 11:02 PM |
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Which way round would you fit it? Sorry if I'm being thick, just not understanding how it would work!
Graham
Website under construction. Help greatfully received as I don't really know what I'm doing!
"If a man says something in the woods and there are no women there, is he still wrong?"
Built 2L 8 Valve Vx Powered Avon
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Jon Ison
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| posted on 2/3/04 at 11:13 PM |
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to allow air into tank but nothing out, they are a very simple 1 way valve which is what your looking for, have a flexible tube from your tank
breather with the valve in the end of it...........
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greggors84
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| posted on 2/3/04 at 11:17 PM |
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Would you use the thread on the bicycle valve or just attach it another way?
Chris
The Magnificent 7!
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Surrey Dave
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| posted on 2/3/04 at 11:41 PM |
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I like it 'Locost' and simple , just push it into some flexible pipe and crimp or use jubilee clip.
Will the vacuum in the tank be enough to open the valve?
If I grind to a halt with fuel starvation I'll no who to blame , Mr Ison
All the local motorcyclists will be please that i'm not dropping fuel at roundabouts then!
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Mark Allanson
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| posted on 2/3/04 at 11:41 PM |
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I would have thought that cutting out the valve from the inner tube and fitting it into some 8MM ID Petrol suitable rubber pipe, other end fitted to
the tank or filler neck
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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madforfishing
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| posted on 2/3/04 at 11:50 PM |
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You're too fast Mark.
That's exactly what I have done about 2 nights ago.
I thought I was being SooooooooooooO
clever.
Damn, you guys are good. (or eves-dropping)
I'll never conquer the world at this rate.
Off Topic: ref evesdropping etc...
Do you think Claire Short signed the Official Secrets Act in her capacities as a MP ?
If so why isn't she banged up in HMP Holloway ? ( or the Tower) ?
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greggors84
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| posted on 3/3/04 at 02:43 AM |
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She probably knows alot more, that she would tell if they banged her up!
Chris
The Magnificent 7!
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JoelP
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| posted on 3/3/04 at 09:38 AM |
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anyway, would you want to bang her up in the tower?!?!?!?
but yeah, she knows more, should probably be silenced anyway. she's SO naive...
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jonti
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| posted on 5/3/04 at 06:29 PM |
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quote:
Originally posted by Surrey Dave
Isn't a 2 way valve , just an open breather pipe?
Think this has been covered above but my ten pennoth for what it's worth
On the face of it yes but not if both "ways" have a spring loaded valve. Air can be pushed and sucked through but liquid not under
pressure ie fuel slop will not pass. You do need two pipes for this to work though.
However, from what's been said the pressurisation of the tank is not an issue so as long as air can get in and fuel can't get out
it's seems like you're ok.
Bike vave is a good idea.. I like that
[Edited on 5/3/04 by jonti]
OFROK
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Jon Ison
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| posted on 5/3/04 at 06:42 PM |
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bike valve = locost.
they do work fine too, just as good as a £XX version.....
Bit like the USA inventing that pen that would write in space/zero gravity and spending millions$$ on it,
wot did the Russians do? took a locost pencil
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