fuel tank baffles
fuel tank baffles i've searched the web till i cant see straight and still haven't found my answers. ok guys i've got a welder, a walbro 255, a new fuel tank sender (single line), and getting a new tank for my 73 firebird to go with my returnless ls6 manifold. so my questions are
1. how do i sump the tank (i know i have to cut it) top to bottom, half way up, size of holes around the bottom, etc? photos would be great
2. does the return line from the c-5 regulator go into the sump area or a different part of the tank? ( should i drill and mount a tube into the sending unit or get the tank with the extra vent lines at the forward corners for the return line)?
3. its a pre unleaded vented tank (through the cap i guess) is that going to give me any problems? (fumes,delivery,overpressurization,etc)
4. cant i just single flare all the lines (fuel rail included) and use an fittings everywhere? ( i'm an aircraft mech and can get that stuff for real real cheap)
5. and thanx for your support joel
1. how do i sump the tank (i know i have to cut it) top to bottom, half way up, size of holes around the bottom, etc? photos would be great
2. does the return line from the c-5 regulator go into the sump area or a different part of the tank? ( should i drill and mount a tube into the sending unit or get the tank with the extra vent lines at the forward corners for the return line)?
3. its a pre unleaded vented tank (through the cap i guess) is that going to give me any problems? (fumes,delivery,overpressurization,etc)
4. cant i just single flare all the lines (fuel rail included) and use an fittings everywhere? ( i'm an aircraft mech and can get that stuff for real real cheap)
5. and thanx for your support joel
when i did my tank i used the fuel pump and sending unit from the wrecked 99 camaro ,i had to cut a hole in the top of a new tank and mount a plate that held the 99 fuel pump assembly. i also added a baffle while i had the hole in the tank . My car has the entire wiring harness from the 99 on it so i just wired it up like it was in 99 I will try to post pic of fuel tank sometime
goodluck, dale
goodluck, dale
Last edited by 76LS1BIRD; Jul 21, 2005 at 08:04 PM.
I know you already have your Walbro pump, but have you seen these pumps, complete with baffle tray, from Tanks Inc.? That's how I plan to go with mine, it has a return fitting built right in. Looks easy to install as well
http://www.tanksinc.com/index.cfm/pa...prod/prd84.htm
Pat
http://www.tanksinc.com/index.cfm/pa...prod/prd84.htm
Pat
Here are two links that might help you
http://www.jalopyjournal.com/forum/s...ht=tank+baffle
http://www.jalopyjournal.com/forum/s...ht=tank+baffle
Hope that hleps
Pat
http://www.jalopyjournal.com/forum/s...ht=tank+baffle
http://www.jalopyjournal.com/forum/s...ht=tank+baffle
Hope that hleps
Pat
Staging Lane
Joined: Dec 2003
Posts: 90
Likes: 0
From: Phoenix
My experience with factory tanks designed for non FI cars is that you can't build a sump deep enough for a external because it hangs below the car with a fuel line hanging off of it. It always made me nervous. This was a lowered production car.
I also built a tank for an offroad application and baffled it and put a small sump in it (about 1" deep and about 5" square), but I could starve the external Walbro with that set-up too. Again, I couldn't build the sump big enough because I was worried abut ground clearance.
For the offroad car, I ended up making an external sump that was always kept full by a inexpensive boost pump. I was about 1 liter in size. I plumbed it with 3/8" aluminum line and AN flares made with a Parker tool. Works well.
For the lowered production car, I just had to keep more that a quarter tank in it. What a PITA.
I also built a tank for an offroad application and baffled it and put a small sump in it (about 1" deep and about 5" square), but I could starve the external Walbro with that set-up too. Again, I couldn't build the sump big enough because I was worried abut ground clearance.
For the offroad car, I ended up making an external sump that was always kept full by a inexpensive boost pump. I was about 1 liter in size. I plumbed it with 3/8" aluminum line and AN flares made with a Parker tool. Works well.
For the lowered production car, I just had to keep more that a quarter tank in it. What a PITA.
Originally Posted by Stu Cool
I know you already have your Walbro pump, but have you seen these pumps, complete with baffle tray, from Tanks Inc.? That's how I plan to go with mine, it has a return fitting built right in. Looks easy to install as well
http://www.tanksinc.com/index.cfm/pa...prod/prd84.htm
Pat
http://www.tanksinc.com/index.cfm/pa...prod/prd84.htm
Pat
-Matt
