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| Petrol tank venting setup https://www.ausmini.com/forums/viewtopic.php?f=5&t=96163 |
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| Author: | Mearcat [ Mon Oct 16, 2017 12:45 pm ] |
| Post subject: | Petrol tank venting setup |
I want to get some ideas on how to deal with the vent/breather requirement for a tank vent with an EFI engine (SPI/MPI or other). I am fitting an EFI engine with an Rover EFI tank, and the tank has a venting port at the top of the tank but I have no charcoal canister with the engine. What is the recommended way to configure the venting line in the system? |
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| Author: | timmy201 [ Mon Oct 16, 2017 1:07 pm ] |
| Post subject: | Re: Petrol tank venting setup |
Will you need to run the same emissions spec as the donor engine? And if you car is post ADR (which being a 78 it will be) you'll need to meet the car regs as well? |
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| Author: | fuzzy-hair-man [ Mon Oct 16, 2017 4:10 pm ] |
| Post subject: | Re: Petrol tank venting setup |
If I remember correctly there's two little pot like things on the top, one I think it's a valve to stop the fuel running out if the car were upside down, I think the other is a tiny version of something like a carbon canister. I kept the valve and connected it's other port forward to the donor vehicles carbon canister, mine has passed an emissions test, which reportedly picks up things like that disconnected. |
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| Author: | Mearcat [ Tue Oct 17, 2017 10:50 am ] |
| Post subject: | Re: Petrol tank venting setup |
The VSB standards state that "any vehicle fitted with expansion/vapour spaces must continue to provide these facilities" so it looks like I need a carbon canister but I need to know how to install them. Do carbon canisters always have 3 ports? Vent/tank feed, one to atmosphere and one to intake? Or are there canisters which have one inlet and one outlet only (ie one vent feed & one to atmo)? |
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| Author: | timmy201 [ Tue Oct 17, 2017 11:02 am ] |
| Post subject: | Re: Petrol tank venting setup |
They should be a sealed system - not going to atmosphere and with an appropriate tank cap. There's plenty to choose from on ebay and at the wreckers. |
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| Author: | fuzzy-hair-man [ Tue Oct 17, 2017 3:45 pm ] |
| Post subject: | Re: Petrol tank venting setup |
Just use the carbon canister from the donor, you know it's the right size and has the correct size hoses, mines in my passengers front wheel arch. The Haynes had a diagram on how the emissions system worked, I just replicated that. |
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| Author: | Mearcat [ Fri Oct 20, 2017 10:28 pm ] |
| Post subject: | Re: Petrol tank venting setup |
fuzzy-hair-man wrote: Just use the carbon canister from the donor... I did say in my first post that I have no charcoal canister with the engine but I'll try and find a canister for something around 1.3L, which should be suitable |
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