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There should be a 1/8" vent nipple on the filler neck, I squeeze that almost closed at the very end and slip a 1/8" vacuum hose onto that, then route the hose through "Frunk" passenger wall, make a upward arch - loop in the hose and secure that up into the wheel well then hang down securing it 1" below the pan....Squeezing the nipple almost closed reduces the gas slosh into the hose but the nipple still has enough of an opening to allow for both tank venting and equal pressure in the tank. 

If you don't want to go through the trouble of making and securing the hinge boxes you can file the hinge opening so it looks same left and right then cut a piece of rubber,  make the hinge slot opening,  use contact cement to secure that to the inside of the cable bulkhead.

Last edited by Alan Merklin
@James posted:

@Alan Merklin   I need to add a vent to my filler neck also.  However, I have been hesitant to drill into the gas tank!  Do you remove the tank and purge before drilling?

You can stuff a tightly balled rag into the neck below where you'll slowly drill the small vent nipple hole, the rag will keep fumes in and will capture and drilled material.

I installed this cap at the end of my vent line. It lets air in, but keeps gas from spilling out into the fender well.

https://www.amazon.com/gp/prod...00?ie=UTF8&psc=1 

@RacerX posted:

But if the cap is at the end of the line and gas does make it’s way to that dead end, how is it going to let air in?

I used the exact same vent on my line and it’s been working very well. I also did put a high loop in the fuel line where it comes off the nipple on the tank. 

If you want to stop your gas from sloshing around and spilling, like mine used to, I suggesting adding tank foam.  It will also keep your tank from exploding if you were to get into an accident.  Here is the link for the company that sells it.

http://www.ksrfoam.com/Fuel_Cell_Foam_Kits.php

You can just push it into the tank through the filler.  I have enough to do a tank if you are interested in purchasing some.  

In every speedster I've done I have yet to have gas running out the vent hose if you follow this .   

There should be a 1/8" vent nipple on the filler neck, I squeeze that almost closed at the very end and slip a 1/8" vacuum hose onto that, then route the hose through "Frunk" passenger wall, make a upward arch - loop in the hose and secure that up into the wheel well then hang down securing it 1" below the pan....Squeezing the nipple almost closed reduces the gas slosh into the hose but the nipple still has just enough of an opening to allow for both tank venting and equal pressure in the tank. 

 

@curtissb posted:

If you want to stop your gas from sloshing around and spilling, like mine used to, I suggesting adding tank foam.  It will also keep your tank from exploding if you were to get into an accident.  Here is the link for the company that sells it.

http://www.ksrfoam.com/Fuel_Cell_Foam_Kits.php

You can just push it into the tank through the filler.  I have enough to do a tank if you are interested in purchasing some.  

Not to be a jerk, but how does the foam NOT affect the float? Unless you also need to install the centroid type float along with the foam.

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