Fuel Sump in tank?
 

Has Anybody done a Fuel Sump in their tank?
http://members.aol.com/trini2dmax/images/tank1.jpg

What's the Easiest way to do this?
Is it really necessary?

Can a regular Welder do this? What about the Fittings?
I will be running an Aeromotive 1000HP fuel pump, and would like it as quiet as possible, any advice on this too?

I am doing a Cosmo 13BT into an 85 GSL-SE.

I have a spare GSL-SE tank off of my donor car and was thinking of doing the sump to advance my project if it is needed.

Please let me know!

That's is technically not a fuel "sump" - you're just moving the fuel pick-up at a more advantageous spot.&nbsp A "sump" implies a baffled area that tends to "trap" fluid sloshing around.&nbsp The FC's already have a sump built into the stock gas tanks.&nbsp Pop the cover and looks for the 4 walls in the middle of the gas tank where the fuel pump and pick-up sits in.

If you want to do something that similar to the picture, there's a lot of aftermarket V8 vendors that offer a panel you went into your stock gas tank.&nbsp I think Moroso sells something similar?&nbsp You'll need to remove your gas tank and take it to a shop that can weld GAS CONTAINERS.&nbsp Slap the AN fittings into the fuel pump and you're done...


-Ted

Okay, then another question..

Does the GSL-SE (fuel Injected) have baffles inside the tank?

So do I NEED to do that fuel Reservoir to the tank?

Or are some people giving me advice just talking out of their ass?

Baffels keep fuel from sloshing, a sump keeps the fuel pump from running dry in extreme acceleration or side to side movement(ie drag or road racing). Yes you can sump your stock tank, just remember to wash it out and let it dry before welding. The Aeromotive pumps are very good but are kinda loud, you can mount them to the front of your tank to keep the noise down.

Alex!
If you continue listenning to advise from people talking out their ass instead of the one who's gonna be building your car then you should probably take it there to get done!:)
Just by looking at the pic above the pump is mounted in the wrong place to begin with. Just about every external pump have to be gravity feed and by placing the pump higher than the sump it's actually not serving any purpose unless the forces of gravity have changed lately!:)

crispeed
87 Rx-7 TII
9.204@150.47mph
2600lbs

I agree with you on this, but even Aeromotive says to mount the fuel pump on the front side of the fuel tank even with the sump. I also know people running the Aeromotive pumps with an intank pick up and it still works great. So I guess their pumps also pull fuel instead of just pushing like traditional inline pumps.

OK. Good, Less to hassle with.

Thanks Cris.

Hey crispeed, what the hell you smoking man?&nbsp We talking about FI applications, right?&nbsp Not carb, right? :smoker:

I think almost all modern stock FI systems run their fuel pumps "above" the fuel level, so all fuel has to "fight" gravity to flow correctly?

What does FI fuel pump mounting position have to do with the fuel system working effectively?&nbsp Are you saying all the stock fuel systems are wrong?



-Ted

I was searching for more info on a fuel sump for the FD. Does anyone have any recomendations on a fuel sump. Can the Aeromotive pump actually be mounted below the fuel level or does it have enough suction to be mounted slighlty above the fuel level on the tank?


Steve

so, chris have you been lurking here for the last 3 months and just decided to post now, or have you been under the car all this time, and are just now comming up for some air??

i want to see some progress pics of the car!!

Speed ,it is an old post from April I dug up ,but I see Crazy Canuck posted some pics with the same setup I was searching for today.

agreed..............

how much is that "sump" kit? i found it to be part # c4040 from http://competitionengineering.com/ca...?CatCode=10070

i have never used them before. does each of their dealers set their own price? or is it a standard price across the board? just wondering if i should call around for the "best" price. :)

rxrotary2, Jeggs has one that looks a bit better and is cheaper. From reading here I would use a hole saw for the tank instead of cutting a large hole, it will help with keeping the fuel in the sump. They look easy to make and a welding or fab shop could make a custom one for cheaper. I was thinking a longer sump with an extra piece of metal welded on to mount the pump to since there in not to many good mounting spots? What should I use for an intank filter?

Crispeed is absolutely CORRECT... The fuel pump should be lower then the sump. You guys are forgetting these pumps don't suck fuel out of the tank. You have to have them gravity feed.

Another bit of advice as for the fuel sump. When you go ahead and cut out the fuel tank, DON'T cut a hole the exact size of the fuel sump. Instead cut out a dozen or so few holes with a hole saw. This way the sump will fill up with fuel very quick and the fuel will stay in the sump under hard acceleration or cornering. this should keep the fuel from sloshing around.

I talked to Aeromotive and asked them if I could mount the pump in tank. They told me that it was fine and would work very well. I was trying to avoid welding a sump in the tank like in the picture.

what filter should be used with that "sump" set-up with the aeromotive pump?

Use two aeromotive stainless filters. Install them before and after the pump.

i have my aeromotive pump mounted in the spare tire well. http://www.jouleusa.com/photo.htm

i am digging this thread up because i wanted to know some opinions about the "sump" discussed in this thread. this is the point i am at right now.
i have the sump welded to the tank and the pump mounted. my problem is this...
the second hold on the "sump"...can it be used as a return? :confused:
i was originaly going to weld a steel AN fitting to the top of the stock plate and use a tube on the other side for my return tube. then use a tube to connect the stock supply and return lines together to cap them off rather than crip them and weld them shut incase i ever need them for anything.

the reason i am asking is because i saw a DSM with the same "sump" and he was using the second 3/8 hole for his return. and when i saw it, it made me think back to the other time i have seen this. i dont remember the line being hooked up to a second pump.
would doing this cause a syphon or any turbulance that i should be concerned about?
any thoughts on this? somthing i am missing? anything?

^^^TTT

WHy not go with a whole new tank? Or maybe it just won't fit correctl?

I was looking at jegs maybe something like this one? Only $189! =) But it has foam insert... and sender... and sump! yummy! ;)

so my idea for usinf the stock steel feed line as a return was no good......lol

personally i dont see what it wouldnt work but u got to figure if u have a full tank the fuel return is gonna be getting pushed back in @ the highest pressure point, wich could fuck with your fuel press when u have a full or a empty tank...personally i would try to have the return dump in the top of the tank, but what do i know ;)
:D

Yeppers.

By the way, what car are you planning this for?

rxrotary2_7, I dont understand Your question and maybe I should. I just pulled My tank off and had the guys I work with make Me a sump like the one from Jegs. This is welded to the bottom of My gas tank with holes drilled in the tank to allow the gas to enter but not escape as easy. If You are using the factory return will it not enter the plastic factory intank sump? The factory sump looks like it is made well and I dont think You are going to have to worry about siphon problems but I could be wrong? I think the bottom of tank sump is much cheaper and safer then an in car fuel cell.