Lid:
http://img340.imageshack.us/img340/6360/lid.jpg

Jet pump circuit
http://img340.imageshack.us/img340/3094/expoded.jpg

Jet
http://img63.imageshack.us/img63/8229/jet.jpg

Jet plus cup feed
http://img63.imageshack.us/img63/9346/exploded2.jpg

Jet bubbler inside cup
http://img340.imageshack.us/img340/8669/bubbleup.jpg

Pressue feed(-6 after pump, -8 to rails) This is a fancy Aeromotive piece for $30
http://img63.imageshack.us/img63/4283/10to6splitter.jpg

Module:
This sits right at the bottom of the tank.
http://img128.imageshack.us/img128/7629/module.jpg

Still need to make a one way valve on the bottom
Questions :) lol

I'm not sure what's goin on up there, so here's my questions: :)

-What is the green canister actually? looks like a coffee mug.
-What mechanism fills the surge tank? (i.e. doesn't a surge setup require two pumps?)
-Are you using the return to fill the surge and doing so through that "jet" hole? If so, is that just another restriction on the pump to push through that hole?
-Is the gas pulled up and out of the surge tank by your pump? Is that a concern for priming between uses?

I've always had "spill out" fromt he filler neck when I accelerate fast. Are you doing anything about that? My plan is to just lop off the upper neck / cap and probably put in a silicon coupler to some other kind of different tube / cap that seals better if I can't weld something in place that's a like diameter to the filler neck.

I'm not sure what's goin on up there, so here's my questions: :)

-What is the green canister actually? looks like a coffee mug.
-What mechanism fills the surge tank? (i.e. doesn't a surge setup require two pumps?)
-Are you using the return to fill the surge and doing so through that "jet" hole? If so, is that just another restriction on the pump to push through that hole?
-Is the gas pulled up and out of the surge tank by your pump? Is that a concern for priming between uses?

I've always had "spill out" fromt he filler neck when I accelerate fast. Are you doing anything about that? My plan is to just lop off the upper neck / cap and probably put in a silicon coupler to some other kind of different tube / cap that seals better if I can't weld something in place that's a like diameter to the filler neck.

1. Green Can is a Stainless water container @ 1 qt. this is newer version http://www.rei.com/product/783899 $11
This one is nice too :
http://media.rei.com/media/uu/dece8151-cc6c-4a55-ac17-b8070bce08a1.jpg
2. Surge tank is filled via 2 ways: return dumps in from regulator/Pressure feed forces fuel from pump thru the jet venturi which also sucks fuel from the tank and bubbles it into the cup.
3. Return just bleeds off from the regulator into the bucket. A1000 should have enough to be able to handle feeding this tiny jet. There has been discussion about using 2 pumps as well. Me thinks this one "should" work.
4. Gas is pushed into the surge tank via jet pump/venturi causes fuel to be pulled from bottom of tank and also fill up bucket/cup. This is same method the OEM's use. Thanks to Steve's investigation on this(vroom)

I have an Elky, we have the plagued right hand turn slosh issue. However, Vroom has also done something similar by whackin the top off. I'll let him elaborate in another thread.

I'm not sure what's goin on up there, so here's my questions: :)

-What is the green canister actually? looks like a coffee mug.

THAT is the surge tank reservoir :yes:

In this case it just happens to be made from a stainless steel "water bottle" that Jason found on sale at REI. It could be just about anything though and there is some flexibility to the size/shape. We thought about using exhaust pipe with a plate welded on to close the end. Jason almost used a coolant recovery tank. The design is for that cylinder to drop down into the tank from the sender lid. In Jason's setup we use 1/8" lamp rod to attach it to the lid. Any kind of threaded rod would work too as would just welding the thing on (although the surge tank and sender lid do not need to seal against each other and there is some benefit to being able to take them apart).
-What mechanism fills the surge tank? (i.e. doesn't a surge setup require two pumps?)
Ah but this DOES have two pumps :yes:

One pump is the high pressure pump you always have with EFI, Jason's is an Aeromotive A1000 mounted outside the tank. On an OEM setup it would be a much smaller pump mounted inside the surge tank.

The other pump is a venturi jet pump in that brass T on the bottom. Note the one picture showing a square pipe plug with the small hole? That shoot fuel across the top of the T and sucks fuel up the leg of the T from the tank. The velocity of the jet pushes fuel over and up where it overflows the tube into the surge tank cup.
-Are you using the return to fill the surge and doing so through that "jet" hole? If so, is that just another restriction on the pump to push through that hole?
No. The return just dumps into the surge tank through an open -6 line.

The jet hole is fed from the high pressure fuel feed. Think of it as a pinhole leak in the fuel supply line ;)
-Is the gas pulled up and out of the surge tank by your pump? Is that a concern for priming between uses?
Yes it is. There is an initial prime required and this is why an external pump needs to be close by and not too high. For first startup it will have to lift fuel. Once the system is primed however there should always be fuel in the line and pump. Jason will have to be sure to not run out of gas too often ;)

Note that as implemented by the OEMs with an internal pump the pump is primed simply by filling the tank. One part we have not added yet is a one way valve on the bottom of the surge tank that allows it to fill whenever the fuel level in the tank is higher than the surge tank.
I've always had "spill out" fromt he filler neck when I accelerate fast. Are you doing anything about that? My plan is to just lop off the upper neck / cap and probably put in a silicon coupler to some other kind of different tube / cap that seals better if I can't weld something in place that's a like diameter to the filler neck.
Look here for how I solved that problem:
http://www.chevelles.com/forums/showpost.php?p=1491535&postcount=5
It is the second to last picture in the thread. Mine was an El Camino so the spill was on right hand turns. But same solution would apply to a Chevelle with filler in back. Just use a '71 and later EEC tank and seal up that gas cap completely. Using a later unleaded filler/cap also pays benefits at the gas station where todays filler nozzles will now stay in place without me having to hold it.

BTW looking at the first picture note the plastic fitting on the top of the gray fuel pump. It connects to one of the flex lines and also has a second round boss on the far end? That round boss feeds the jet pump on the bottom of that plastic cup (with the sock sticking out behind).

Awesome. Thanks for all of that.

So this is something you can test in a bucket right? Not to be overly critical here, but how are you gonig to know how much of the REI surge tank is full? I somewhat recall how a venturi works from school, but no matter how it's done, the device is still doing "work" i.e. psuhing X amount of fuel higher so that more fuel can enter into the tank.

For my case, I think that at full throttle there will be very little if any gas going back to the tank via the return line. So no venturi affect there for me.

A friend of mine is putting an LS2 into his Impala and he is using some kind of a surge tank that is up near the engine bay. He does not have a return line going to the rear gas tank. Rather, he has a reutrn line going to this "fist sized" module. But this doesn't stop the pump from starving and the pressure from dropping though. Would I be correct in advising him to never run below a 1/4 of a tank? He has a covans dash and has the fuel psi display on it.

I just need a gas tank with a bottom shaped like this: \/

Then I have a sump, and don't need a surge. Or.... never get below 5 gallons in the tank. :D