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TechTalk
 Petrol tank - canister vent
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| Author | Topic |
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| Tony Martyr Windbag Location: Inkberrow, Worcestershire. | Posted - 11 October 2003 12:03   
My pre-SVA built k series car was stripped of its exhaust CAT etc long since but the Charcoal vent cannister remained simply because it was difficult to get out and I did not need the space. Now I have fitted a Mocal oil catchment tank in its space I have to deal with the connection of the vent pipe. Is it safe to simply connect it into the catchement tank as a vented space or can it be closed off? I am aware that some k series cars suffer from spilling fuel out of one of the rear vent pipes but have never got to the bottom of why this happens. I also remember Peter C having a vent run up the roll bar for some reason unknown to me. Can someone give the definive petrol vent circuit advice. |
| Myles I think I just saw Arne Saknussen..... Location: Burning up my share of £2.6k of bandwidth | Posted - 11 October 2003 16:46
Right, The breather pipe that comes out of the top of the fuel filler neck either disappears into thin air beneath the car (esp. on Academy cars like mine) or goes into the cannister. With a fullish tank, on left hand corners (when 'making progress') the fuel sloshes to the RH side of the tank, up through the filler neck and out through the breather. And then vents under the car and makes everything smell worryingly of petrol. I've been told that the amount coming out is 'significant', so you'll want to do something about it (many people have been black-flagged on circuit races due to the amount coming out...) The two solutions are basically to either run a long breather tube up the FIA bar and then back down again (ensuring that the tank *is* vented and creating an air-lock that shouldn't allow fuel out even if you roll (I assume the tail of this breather has to end up below the level of the tank)), or you can follow these instructions: here which is what I did. Be warned that: i) the first solution looks pants and ii) if you have a honeycomb floor protection insert, you might find it awkward to get access to the side of the tank to fit the second solution. Both work though, so take your pick. Regds, Myles Alcester Racing 7's Equipe -  |
| mav I think I just saw Arne Saknussen..... Location: Chester | Posted - 11 October 2003 18:04
Myles, Is that for uk ROAD cars and RACE cars? If so who issued the notice and when? Cheers |
| Myles I think I just saw Arne Saknussen..... Location: Burning up my share of £2.6k of bandwidth | Posted - 11 October 2003 18:34
Mav, It was posted by one of the Graduate racers on www.graduates.org.uk on March 24th. I understand from comments made by Mike Molloy (2001(/2?) Academy driver that this mod might have become mandatory for grads/academy events (this year?) I don't have any further info. really other than that published in the bulletin. BTW - the part no mentioned is a CC part number... Cost including low pressure fuel tube was 20-25 quid IIRC Regds, Myles Alcester Racing 7's Equipe - |
| mav I think I just saw Arne Saknussen..... Location: Chester | Posted - 11 October 2003 18:37
Cheers. |
CHRIS CLARK Location: scuba diving....._[:}@==< | Posted - 12 October 2003 23:21
I fitted this mod a long time back and can confirm it works fine!!! |
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Petrol tank - canister vent
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