Camaro LT5

[randy]

The vent line connection is low from the back port. Wouldn’t you think fuel slosh would get back in the line and since the hardline is low there’s no way for the fuel to go back in the tank? You would think over time it would cause your hardline to fill up and make the filler neck vent pointless

Originally Posted by Stielow

A fuel tank needs room to vent. The lines attempt to connect the vent to the highest point in the tank. One up on the filler neck and the other on the top corner. They Tee together then go up to the TooMuch vent in the trunk. Hope it works. If not I’ll add a expansion tank. The issue in the summer we pump 70 degree fuel into a car when it is 90 degrees out side. The fuel expands and fills the TooMuch vent. OE ad a dome or expansion area for this. In hot rods we want all the fuel volume we can get.

We route the brake lines the best we can on the subframe. Going rear we end up riding them down to the bottom of the car on the sheet metal. Because of the ABS it is 2 rear brake lines.


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[Stielow]

Originally Posted by randy

The vent line connection is low from the back port. Wouldn’t you think fuel slosh would get back in the line and since the hardline is low there’s no way for the fuel to go back in the tank? You would think over time it would cause your hardline to fill up and make the filler neck vent pointless

Now that I think about I think you are correct on the tank vent. I’ll add a overflow tank in the tank before the TooMuch canister.


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[JohnUlaszek]

Originally Posted by Stielow

Now that I think about I think you are correct on the tank vent. I’ll add a overflow tank in the tank before the TooMuch canister.


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Mark,
Overflow isn’t needed, but just one vent on the filler neck and one on the body of the tank, both lines should meet at a T fitting and then a single line up to the IIMUCH VSB.

[clill]

The problem I run into with the vent hose hooked up to the filler neck is with a full tank when accelerating the fuel goes up the vent hose into the Too Much canister to the point it fills it up and overflows out thru it's vent.

[69hugger]

Originally Posted by clill

The problem I run into with the vent hose hooked up to the filler neck is with a full tank when accelerating the fuel goes up the vent hose into the Too Much canister to the point it fills it up and overflows out thru it's vent.

...A condition known as II Much acceleration! 😁

[Stielow]

Originally Posted by JohnUlaszek

Mark,
Overflow isn’t needed, but just one vent on the filler neck and one on the body of the tank, both lines should meet at a T fitting and then a single line up to the IIMUCH VSB.

Been there tried that. We added a 1 quart over flow tank in the trunk. It is the way highest point in the system. Then we vent off the top of that to the Too Much canister.

I’m sick and tired of the fuel puking out. It seems to work great. I fully filled my tank with very cold fuel and then parked it in my heated garage. No fuel smell and no signs of over flow.

Done. Fixed it. I hope. We will find out this summer.


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