wombat
|
| posted on 27/1/14 at 04:22 PM |
|
|
Fuel tank Valve - Cut off - vent
Do I really need to spend 50 quid on a Mocal two way valve?
I have been searching all forums and tinternet and it certainly looks that way...........
Help appreciated as always
|
|
|
|
|
blakep82
|
| posted on 27/1/14 at 04:31 PM |
|
|
not really, you can in theory wrap pipe of hose around the tank, so there's always a high point in the breather pipe, no matter what way up the
car is.
best way is to fit a valve. its neater, smaller, and probably better for IVA
but what always gets me, is that in everyone's build photos, I dont think i've ever seen anyone on here fit one...
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
|
|
|
davidimurray
|
| posted on 27/1/14 at 04:45 PM |
|
|
You should really have a 2 way valve with rollover protection, that's what I fitted to mine. Lets air in and out but shuts off is fluid hits it.
Gallery 1 http://www.facebook.com/media/set/?set=a.116893465324.130778.601005324
Gallery 2 http://www.facebook.com/media/set/?set=a.245243755324.181913.601005324&l=a9831a9319
Gallery 3 http://www.facebook.com/media/set/?set=a.440671625324.232627.601005324&l=3f0d42c523
Gallery 4 http://www.facebook.com/media/set/?set=a.490098255324.297598.601005324&l=efb083b7df
Gallery 5 http://www.facebook.com/media/set/?set=a.10150244028550325.366987.601005324&l=583fd5cd3a
Gallery 6 http://www.facebook.com/media/set/?set=a.10150550640070325.430417.601005324&type=3&l=fe779b358c
Duratec Engine Swap https://www.facebook.com/media/set/?set=a.10152527759580325.1073741828.601005324&type=1&l=40aae5e72f " target="_blank"> https://www.facebook.com/media/set/?set=a.10152527759580325.1073741828.601005324&type=1&l=40aae5e72f
|
|
|
theprisioner
|
| posted on 27/1/14 at 04:48 PM |
|
|
I think Mocal valves are worth it, you can fit a swan neck tube tube and a roll over valve but the Mocal is better.
http://sylvabuild.blogspot.co.uk/2013/12/fuel-system-modifications.html
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
|
|
|
renetom
|
| posted on 27/1/14 at 05:03 PM |
|
|
vent
Hi
we have this & it works fine & the valve costs under a fiver.
if it goes tits up the fuel wont leak out , tested it.
we are running carbs so its all we need.
 
Tank breather & non return valve
Good luck
|
|
|
AndyW
|
| posted on 27/1/14 at 05:43 PM |
|
|
I used on of these, IVA man happy with it.
http://www.demon-tweeks.co.uk/motorsport/fuel-tank-vent-valves/atl-tank-vent-valve-6-vent-inline-to-suit-6-hose-3-8-hose-barb
|
|
|
wombat
|
| posted on 27/1/14 at 05:50 PM |
|
|
Renetom, im on injection.
AndyW, will my tank implode because it's getting sucked in?
Surely if the fuel cap is vented then I just need the anti spill type valve?
To be clear, not intending on racing it, can add a mocal later for track days.......
|
|
|
renetom
|
| posted on 27/1/14 at 06:08 PM |
|
|
The valve lets air in as the tank level falls
That's it .
If injection causes the tank to be pressurised by the return
then you will need the all dancing one.
|
|
|
davidimurray
|
| posted on 27/1/14 at 06:50 PM |
|
|
Don't forget that if you park the car outside on a sunny day the petrol will heat up, expand and pressurise the tank, hence why you should use a
2 way valve.
Gallery 1 http://www.facebook.com/media/set/?set=a.116893465324.130778.601005324
Gallery 2 http://www.facebook.com/media/set/?set=a.245243755324.181913.601005324&l=a9831a9319
Gallery 3 http://www.facebook.com/media/set/?set=a.440671625324.232627.601005324&l=3f0d42c523
Gallery 4 http://www.facebook.com/media/set/?set=a.490098255324.297598.601005324&l=efb083b7df
Gallery 5 http://www.facebook.com/media/set/?set=a.10150244028550325.366987.601005324&l=583fd5cd3a
Gallery 6 http://www.facebook.com/media/set/?set=a.10150550640070325.430417.601005324&type=3&l=fe779b358c
Duratec Engine Swap https://www.facebook.com/media/set/?set=a.10152527759580325.1073741828.601005324&type=1&l=40aae5e72f " target="_blank"> https://www.facebook.com/media/set/?set=a.10152527759580325.1073741828.601005324&type=1&l=40aae5e72f
|
|
|
AndyW
|
| posted on 27/1/14 at 08:06 PM |
|
|
quote:
Originally posted by wombat
Renetom, im on injection.
AndyW, will my tank implode because it's getting sucked in?
Surely if the fuel cap is vented then I just need the anti spill type valve?
To be clear, not intending on racing it, can add a mocal later for track days.......
I used it on mine as injection, and as been said, it lets the tank vent and breathe and then closes should I find myself upside down or on its side. I
just pushed it into a breather hose and secures in the upright position. Works well.
Good luck..
Andy
|
|
|
snapper
|
| posted on 27/1/14 at 08:29 PM |
|
|
I fitted 2 valves 1 is a cheap snorkel ball roll over so closes when car upside down therefor tank breaths in normal operation
I ran a small tube from tank high up
Second breather is a simple one way valve plumbed off the fuel filler hose to draw air as fuel is used, this will close if car upturned
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
