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Author: Subject: Tank return
melly-g

posted on 17/7/14 at 09:58 AM Reply With Quote
Tank return

Do I need a return to my fuel tank from the fuel rail, or can i get away with just a return to the swirl pot?
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CosKev3

posted on 17/7/14 at 10:09 AM Reply With Quote
I would say to tank, as the amount from pump and return could be too much for the swirl pot?

Suppose it will depend on sizes though, of swirl pot and how much fuel pump is pushing in etc?

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ashg

posted on 17/7/14 at 10:12 AM Reply With Quote
it should go back to the swirlpot from the rail, then there should be a separate return from the swirl pot to the tank.





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cliftyhanger

posted on 17/7/14 at 10:13 AM Reply With Quote
And I would say swirl pot, as the amount of fuel the HP pump shifts will outstrip the LP pump feeding the swirl pot?
There should be a return/bleed from the top of the swirl pot to the tank anyway.

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adithorp

posted on 17/7/14 at 10:15 AM Reply With Quote
If you're using a swirlpot, it's usual to have a return from the fuel rail to the swirlpot and then a return from the swirlpot to the tank. If you don't have a return from the 'pot to the tank then there's no way for gas to escape from it.





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kingster996

posted on 17/7/14 at 10:16 AM Reply With Quote
This might help








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Neb

posted on 17/7/14 at 11:23 AM Reply With Quote
Diagram is great.

Out of interest what kind of low pressure pump do you use? Could you use a facet red top or similar?

May go to MX5 power after IVA (currently xlfow) so would need the swirl pot set-up. Tank is already set up for injection set-up.

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Ugg10

posted on 17/7/14 at 11:33 AM Reply With Quote
I'm fitting a Puma 1.7 Zetec in my car, looking to use a Posiflow pump for the low pressure as I have one lying about - http://www.facet-purolator.com/posi-flo-pumps.php - cheaper than the facet red tops and should do the job upto 175 hp injection.





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Neb

posted on 17/7/14 at 11:54 AM Reply With Quote
Oh cool - that's what i currently have fitted. That can stay.

Thanks.

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melly-g

posted on 17/7/14 at 12:05 PM Reply With Quote
I thought as much!! I was hoping I wouldn't have to run another fuel line along the tunnel back to the tank! Oh well!
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