Scenario: My 84 K10 has a drivers side saddle tank, and the three outlet sending unit. From the factory this was out to the fuel pump, return from the fuel pump, and vapor for the charcoal canister. This truck lost its emissions controls maybe 20 years ago and when it was carbed, the charcoal canister line became the vent for the fuel tank. It worked fine, no problems.
When I added fuel injection, using a Hyper Fuel Command Center 2.0 as the fuel source, the charcoal canister vent line became a fuel return line. And I drilled a hole in the gas cap and epoxied in a differential vent for the fuel tank vent.
Which works fine except when I am on an incline and the front of the truck is in the air gas dumps out of the cap. Which happened multiple times at Blazer Bash this past year, the high temps in Moab probably didn't help.
So it is time to fix / upgrade the situation.
So far, I have three ideas:
1) The Command Center came with a bung to be used as a fuel return, I was thinking I could drill the tank at the highest point and run a line up to the front of the truck where the charcoal canister line used to reside, with some sort of filtration device on the end. I am not the biggest fan of drilling into the fuel tank though.
2) I was thinking I could tee into the fuel fill vent hose, which I believe is 5/8", close to the gas cap and run a line up to the front of the truck to where the charcoal canister used to reside, with some sort of filtration device on the end. I feel like this would be easy but I have the chance of fuel getting into that that line and it just sitting there.
3) Spend the big bucks ($380ish) and get the Holley fuel pump made to drop in the saddle tank and run EFI, and it has a built-in regulator so it's only one gas line out and one vent line out. Run the vent up to where the charcoal canister used to reside, with some sort of filtration device.
I already have over $300 invested in the Command Center, and it seems to work just fine, so I am looking for a solution that works with it.
I am open to all thoughts and ideas.
When I added fuel injection, using a Hyper Fuel Command Center 2.0 as the fuel source, the charcoal canister vent line became a fuel return line. And I drilled a hole in the gas cap and epoxied in a differential vent for the fuel tank vent.
Which works fine except when I am on an incline and the front of the truck is in the air gas dumps out of the cap. Which happened multiple times at Blazer Bash this past year, the high temps in Moab probably didn't help.
So it is time to fix / upgrade the situation.
So far, I have three ideas:
1) The Command Center came with a bung to be used as a fuel return, I was thinking I could drill the tank at the highest point and run a line up to the front of the truck where the charcoal canister line used to reside, with some sort of filtration device on the end. I am not the biggest fan of drilling into the fuel tank though.
2) I was thinking I could tee into the fuel fill vent hose, which I believe is 5/8", close to the gas cap and run a line up to the front of the truck to where the charcoal canister used to reside, with some sort of filtration device on the end. I feel like this would be easy but I have the chance of fuel getting into that that line and it just sitting there.
3) Spend the big bucks ($380ish) and get the Holley fuel pump made to drop in the saddle tank and run EFI, and it has a built-in regulator so it's only one gas line out and one vent line out. Run the vent up to where the charcoal canister used to reside, with some sort of filtration device.
I already have over $300 invested in the Command Center, and it seems to work just fine, so I am looking for a solution that works with it.
I am open to all thoughts and ideas.
