proper way to vent fuel tank ?

[Stolen76]

I'm installing my S10 gas tank in the morning. I'm not using a return line now, so I won't be putting one into the new tank. The pickup/pump/sender assembly has a spout for a vent line. I know I need to vent the tank as the S10 cap isn't vented. So, how do I safely vent this tank without going out and getting the whole charcoal canister thing.

[Cliff]

Here's what I did on my race car. It's a 401 powered AMC Spirit. The tank has a vent line welded in the top, but I didn't want to run it to a charcoal cannister. I ran a hose from the tank as high as possible above the rear axle, about 6" higher than the tank vent. At the end of the hose I installed a fuel filter, to keep stuff from getting into the vent line. That's it. I never have vapor problems. If your S10 tank doesn't have a vent, some radiator shops can install one. Just make sure it's at the highest point.

Where are you putting this S10 tank? How many gallons?

[BIG BAD JON]

13 gallons!

[Stolen76]

thanks Cliff, it's a 22 gal tank, going to hang it where the spare is supposed to be.

13 gallons ! now that would be a complete waste of time ! This is a 22 gallon tank, I've got the filler neck too, and it looks like it is going to go out the body right under the side tank fill.

[Stolen76]

Tank fits great, filler neck even lines up. Had spare room towards the axle, but between the rails it was a good fit. It comes down even with my hitch on the bottom so I'll probably do a body lift or rear blocks to gain some ground clearance. Well worth the time spent to pick up the extra capacity.

[BostonWagoneer]

What year S10 is it from and what engine? How did you rig up the sending units? I am looking to do the same but I was going to try to get a 20-gallon plastic tank from a YJ or something with a carbed sending unit and not an FI pump/sending unit.

Got pics?

Thanks

[Stolen76]

It's from a 96 4.3 liter vortec. I hooked up the sending wires, but not the fuel pump wires. I got a gm fuel gauge for $5 to put under the dash. I'm drawing through the fuel pump and not using it, but I did run wire for the pump so I can pull the hose off of my fuel/water seperator put power to the pump and fill my mower and stuff like that.

[BostonWagoneer]

Nice! Portable gas station! smile.gif

So you are pulling fuel through the electric pump with the mechanical pump? Does it flow freely?

[Stolen76]

pulls through electric pump easily. here's the tank I got, actually got it from this guy and he sent everything.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33556&item=1876472797

[BostonWagoneer]

Cool, thanks. $70 plus $40 shipping is a little more than I want to spend. Thanks for the info though!

I wonder if all electric pumps are like the one in the S10 tank where the fuel can be pulled through with no resistance.