LS Swapping your Blazer? Here's how I did an OEM level fuel tank

[phillipm]

In this photo you can see the black 90 degree fitting I snapped on. That is the main vent port out of the fuel tank. The other smaller port goes into the same chamber so you can use either of these. For me, I hooked my vent up to the 2009 Chevy Evap canister which is this size of hose. I also teed into the factory Blazer vent which is up in the filler neck. That way I would hopefully have less issues filling the tank.

As I said this line runs to the Evap cannisters, from there it is controlled by the ecm to purge into the engine. It also has a fresh air vent on there with a vent control solenoid. Basically all this is to keep the truck from smelling up my garage with gas fumes! Nothing I hate more than a truck that stinks up your garage. I always find it funny when people rip this stuff out, not even knowing what it's function is.



Also, here is a picture of my Evap canister mounted under the driver's side of the truck.

[DM72C20]

Old thread but this idea seems very smart. Working on an LS swap into my 72 C20.

You say: "So a universal sender will be needed. Also you can either use a Vaporworx PWM fuel controller (recommended) or a C5 corvette FPR. Either will work."

I've got the entire fuel system that I can use from my 09 Silverado donor truck - aside from the universal sender, would I require the other things? Any Vaporworx controller is at least $400 which is way more than I want to spend on a fuel system.

What universal sender would I want to look at? I think it is just a simple sender that you can drill a hole in the tank and install. I take it the 0-90ohm would work for a 72 stock fuel gauge?

[buffydores]

Phillip hooked me on to this idea and helped me put together my setup. It's money.

[phillipm]

Originally Posted by DM72C20

Old thread but this idea seems very smart. Working on an LS swap into my 72 C20.

You say: "So a universal sender will be needed. Also you can either use a Vaporworx PWM fuel controller (recommended) or a C5 corvette FPR. Either will work."

I've got the entire fuel system that I can use from my 09 Silverado donor truck - aside from the universal sender, would I require the other things? Any Vaporworx controller is at least $400 which is way more than I want to spend on a fuel system.

What universal sender would I want to look at? I think it is just a simple sender that you can drill a hole in the tank and install. I take it the 0-90ohm would work for a 72 stock fuel gauge?

I'm actually using a C5 FPR on my blazer at first, and then I realized the GM module I was using had an internal regulator so I've since removed that. As for the universal sender, yes I just used a VDO universal 0-90 sender and drilled a hole in the top of the tank.

[mcmlxix]

Originally Posted by phillipm

In this photo you can see the black 90 degree fitting I snapped on. That is the main vent port out of the fuel tank. The other smaller port goes into the same chamber so you can use either of these. For me, I hooked my vent up to the 2009 Chevy Evap canister which is this size of hose. I also teed into the factory Blazer vent which is up in the filler neck. That way I would hopefully have less issues filling the tank.

As I said this line runs to the Evap cannisters, from there it is controlled by the ecm to purge into the engine. It also has a fresh air vent on there with a vent control solenoid. Basically all this is to keep the truck from smelling up my garage with gas fumes! Nothing I hate more than a truck that stinks up your garage. I always find it funny when people rip this stuff out, not even knowing what it's function is.



Also, here is a picture of my Evap canister mounted under the driver's side of the truck.

Phillip... do you have the part number for the 90° fitting

What about hose? Nylon? What size?

[phillipm]

Originally Posted by mcmlxix

Phillip... do you have the part number for the 90° fitting

What about hose? Nylon? What size?

I’m using Gates Barricade hose on everything. 5/8 for large evap and 3/8 for fuel feed. 1/4” hardline (aluminum) for the evap purge line to the engine.
Posted via Mobile Device