Fuel Tank Sump
- Thread starter whudafux
- Start date
Guys,
I have been battling between going with a full fuel race cell ( with foam inside ) or using the stock fuel tank and running a sump and external pump ( weldon or aeromotive 1000). Seems this would be the better of the two choices since it retains the factory fuel tank and filler neck for ease of gas station usage LOL....and it would be ULTRA simple to run the lines to the aeromotive FPR (1/2" NPT threads from return and sending lines )!!!
I am glad someone pointed this thingy out!
Anyone have a spare fuel tank laying around I could buy?
-Jonathan:icon_razz
I have been battling between going with a full fuel race cell ( with foam inside ) or using the stock fuel tank and running a sump and external pump ( weldon or aeromotive 1000). Seems this would be the better of the two choices since it retains the factory fuel tank and filler neck for ease of gas station usage LOL....and it would be ULTRA simple to run the lines to the aeromotive FPR (1/2" NPT threads from return and sending lines )!!!
I am glad someone pointed this thingy out!
Anyone have a spare fuel tank laying around I could buy?
-Jonathan:icon_razz
I'm sure you can pick up a fuel tank easy, lots of people parting cars will be glad to get rid of one. Shipping might be nasty, though. 
I've seen several guys mount a fuel cell in the spare tire well, then run a separate line, power, and pump for it, hook everything up to a switch so you can switch from pump to race gas easily.
I've seen several guys mount a fuel cell in the spare tire well, then run a separate line, power, and pump for it, hook everything up to a switch so you can switch from pump to race gas easily.
I was thinking cell would be better, and I may be doing just that.
Now that's not a bad idea, Dave.. 10gal of c16 ready when you are
Now that's not a bad idea, Dave.. 10gal of c16 ready when you are
Yep with current management technology being able to easily switch maps the 2nd tank with race fuel is a great idea!
If someone has a piggy backed stock ECU it's a dumb as dirt idea
If someone has a piggy backed stock ECU it's a dumb as dirt idea
Just do it yourself, saves a lot of money. Took this one out of a parts car. Gives you a good idea how easy it is... :bigthumb:
What's wrong with the stock sump? I guess it doesn't have bling. Stock ones work so good I took the sump out of a mkiii tank and put it in a carbed Z tank I also used the intank pump hanger and flange with a Walbro.
Clifton said:
huh?
the stock sump is not meant for dragging purposes.
Just think logically what happens to all that gasoline in the tank when you accelerate. That is why you need a sump
figgie said:huh?
the stock sump is not meant for dragging purposes.
Just think logically what happens to all that gasoline in the tank when you accelerate. That is why you need a sump
And you think a small box welded to the bottom of a tank is meant for dragging? Why because it has an AN fitting? There is a baffled sump in the stock tank. The fuel cannot exit it without going out the pickup. If it's good enough for my car that not only goes fast in a straight line but is also autocrossed(more G's than dragging)with R compound tires I don't see why it wouldn't be good for dragging. I'm pretty sure with my power to weight ratio I can accelerate as hard if not harder than any MKIII on this board and I have yet to have a fuel pick up problem. Try a welded on sump autocrossing with EFI and 1/4 tank.
The sump is to facilitate installation of an external fuel pump. I've tried both picking up from the stock drainplug location and welding in a crudely baffled sump and the sump picks up 10 times better.
Clifton said:
ahh ignorance
You seem reluctanct to understand the simple physics of why that "simple" little box actually aids in fueling and what it's SPECIFIC purpose is......
A fuel cell that is designed with autocrossing/roadracing in minds will not work well in a drag environment and vice versa. That is WHY the circle track folks actually sump the fuel tanks on the left hand side. Guess where all the gasoline accumalates and no amount of one way trap doors or anything else will keep that fuel in the stock sump area. Want to take a guess whee RCI intalls their fuel sumps on their fuel cell that are for drag racing? You have ONE guess
Of course am talking about a fuel cell but guess what. What works in a fuel cell works in the stock fuel tank too
Sumps are built with a purpose. The purpose of the STOCK sump is to keep fuel on the pickup area under street driving condition. Change the purpose of the car and the fuel tanks sump has to be changed accoridingly.
See all the purpose built fuel cells to see WORKING examples of what I state. Drag is ALWAYS towards the back, Circle track is always towards the left hand sid as they are always turning right
Road racing have specific baffles + one way gates plus other confidential mechanism to always keep fuel going even when running on near empty.
figgie said:ahh ignorance
You seem reluctanct to understand the simple physics of why that "simple" little box actually aids in fueling and what it's SPECIFIC purpose is......
A fuel cell that is designed with autocrossing/roadracing in minds will not work well in a drag environment and vice versa. That is WHY the circle track folks actually sump the fuel tanks on the left hand side. Guess where all the gasoline accumalates and no amount of one way trap doors or anything else will keep that fuel in the stock sump area. Want to take a guess whee RCI intalls their fuel sumps on their fuel cell that are for drag racing? You have ONE guess
Of course am talking about a fuel cell but guess what. What works in a fuel cell works in the stock fuel tank too
Sumps are built with a purpose. The purpose of the STOCK sump is to keep fuel on the pickup area under street driving condition. Change the purpose of the car and the fuel tanks sump has to be changed accoridingly.
See all the purpose built fuel cells to see WORKING examples of what I state. Drag is ALWAYS towards the back, Circle track is always towards the left hand sid as they are always turning right
Your right, ignorance. Re read my post.
I don't run a cell in this car. I never even said the word FUEL CELL. I run a stock tank with a Supra sump/baffle and intank pump in it. I am saying welding on a sump to the bottom of the tank is not as good as the stock tanks baffled pick up, either in a straight line, turn, or with the car sitting on it's side. There is not a fuel pick up problem with the stock tank in any situation. Unless your MKIII can pull over 1g all the way down a 1/4mi:nono: You don't need it, even though you think you do. If someone wants to run an external pump and blingy sump hanging down with shiny fittings on there street car then that's different.
Clifton said:
blingy sump and external fuel sump.
hmm perhaps you also need some basic read comprehension 101. The MKIII sump baffle is far from "good" enough. It works but so does holding gasoline in a gallon of milk and feed the motor from their. No matter what your you closed mind seems to think, the sump does have a purpose hence my purpose built statements. If they didn't no aftermarket fuel cells would use them.. Capiche why I put fuel cell n my statement? For morons like yourself that don't read and much less comprehend what a fucking example is.
I am done with you.
figgie said:
Hmm, name calling. What are you 15? Nice representation of the way a mod should behave on a board. This is what happens when people don't agree with what you say?
My closed mine knows the MKIII setup works as I use it. I'm not saying that cells don't work. I'm just saying the Supra tank works and not just in a straight line.
Drag cells don't work for road racing or autoX. Circle track cells can work for drag racing but not for RR or autoX. Neither work well on the street if your car can handle. Again, back on the cell topic. The stock tank works great for everything. What part of that don't YOU understand. You say "far from good enough". Give an example. You have pick up problems in your car? I don't think so. If you do try running more than 3 gallons.
the white spray was dyecheck? and the fresh welds were where the red dye showed a leak?
When welding fuel containers (this is esp for large confined spaces like tanks) you need to fill with water and leave it for a few hrs. preferably overnight then drain and let dry.There was a explosion in one tank at fremantle one time where the fabrication company didnt do that and it resulted in 1 crispy boilermaker welder and large fines.Just be careful.
When welding fuel containers (this is esp for large confined spaces like tanks) you need to fill with water and leave it for a few hrs. preferably overnight then drain and let dry.There was a explosion in one tank at fremantle one time where the fabrication company didnt do that and it resulted in 1 crispy boilermaker welder and large fines.Just be careful.
Clifton said:
no need see
When dealing in puny volumes that a "walbro 255" fuel pump flows can you get away with that. Increase the flow to well over 220+ GPH @ 45psi (mind you that the walbro only flows 67 GPH at 0 psi) and the stock baffling and sump decide they don't work to well anymore. That is my evidence and you can take that as you see fit.
Yep, walboro 255's suck in flow.
67 gallons per hour vs. a holley ( though not compatible with fuel injected motors since they dont flow enough pressure to fullfill the needs of a FI motor ) flows 200 gallons per hour. (blue series).
I personally am not spending $100 on a walboro 255 ( though for stock modded supra's do their job respectively better than that of a stock mk3 pump) and spend $100 more for an aeromotive unit, many other brands out there though to choose from.
67 gallons per hour vs. a holley ( though not compatible with fuel injected motors since they dont flow enough pressure to fullfill the needs of a FI motor ) flows 200 gallons per hour. (blue series).
I personally am not spending $100 on a walboro 255 ( though for stock modded supra's do their job respectively better than that of a stock mk3 pump) and spend $100 more for an aeromotive unit, many other brands out there though to choose from.