ALLOY FUEL TANK SUMP / BAFFLE DESIGN
Discussion
I have a homemade alloy fuel tank in my westie and was looking to install a fuel sump due to poor location of pickup and starvation issues.
Was thinking of something like this. 100x100x25 situated in the middle of the tank.
Will this work? What is the usual design for these?
What is the standard baffle design? I am struggling to find anything on these....
Was thinking of something like this. 100x100x25 situated in the middle of the tank.
Will this work? What is the usual design for these?
What is the standard baffle design? I am struggling to find anything on these....
M4gnu5 said:
I have a homemade alloy fuel tank in my westie and was looking to install a fuel sump due to poor location of pickup and starvation issues.
Was thinking of something like this. 100x100x25 situated in the middle of the tank.
Will this work? What is the usual design for these?
What is the standard baffle design? I am struggling to find anything on these....
I tried something like this on my old race care. It work a bit better than standard but didn't completely resolve the issue.Was thinking of something like this. 100x100x25 situated in the middle of the tank.
Will this work? What is the usual design for these?
What is the standard baffle design? I am struggling to find anything on these....
You could combine that with tank foam and cut away the area of foam above the "sump". That would help some more.
Or you could just fit an external surge tank, like this -
http://www.compbrake.com/product/dome-fuel-swirl-p...
Modifying an existing tank will be a right pain.
As already said use an external swirl/surge pot.
Fit a low pressure pump (with the required flow) between the tank and pot. Fit a return to the tank from the top of the pot. Fit a restriction in the return line to keep a positive pressure in the pot (restrictor with a 1mm hole will be OK). You don't care if very little fuel returns to the tank all you want to do is clear any air/vapour trapped in the top of the pot.
You don't say if the engine is carbs or fuel injection. You will need to add another pump of the correct pressure and flow after the pot. If it is high pressure for fuel injection the positive pressure in the pot will help avoid cavitation at the inlet to the pump.
Steve
As already said use an external swirl/surge pot.
Fit a low pressure pump (with the required flow) between the tank and pot. Fit a return to the tank from the top of the pot. Fit a restriction in the return line to keep a positive pressure in the pot (restrictor with a 1mm hole will be OK). You don't care if very little fuel returns to the tank all you want to do is clear any air/vapour trapped in the top of the pot.
You don't say if the engine is carbs or fuel injection. You will need to add another pump of the correct pressure and flow after the pot. If it is high pressure for fuel injection the positive pressure in the pot will help avoid cavitation at the inlet to the pump.
Steve
Thanks for the replies guys.
Car runs a set of Jevney carbs and a Facet fuel pump. There in only a single feed line from tank to pump and then a single feed from pump to carbs. No return lines.
The tank is home made, but the outlet has been positioned incorrectly as shown in picture. The outlet is at the front R/H side of the tank and this is causing fuel starvation on R/H corners and up hills, but running OK the rest of the time.
I can get the sump fitted FOC from one of my work contacts. Hopefully this will be a quick / easy / cheap fix. Certainly worth a try before thinking about a swirl pot.
Will post update in due course......
Car runs a set of Jevney carbs and a Facet fuel pump. There in only a single feed line from tank to pump and then a single feed from pump to carbs. No return lines.
The tank is home made, but the outlet has been positioned incorrectly as shown in picture. The outlet is at the front R/H side of the tank and this is causing fuel starvation on R/H corners and up hills, but running OK the rest of the time.
I can get the sump fitted FOC from one of my work contacts. Hopefully this will be a quick / easy / cheap fix. Certainly worth a try before thinking about a swirl pot.
Will post update in due course......
Drill a smaller hole than the sump being fitted. Ive got a 50mm hole and a 100mm sump, this allows fuel in and not to slosh out.
Also think about -AN fittings welded on to the side of the sump it makes for a neater finish.
https://www.flickr.com/photos/pigeondave/927779056...
Also think about -AN fittings welded on to the side of the sump it makes for a neater finish.
https://www.flickr.com/photos/pigeondave/927779056...
Hi all,
Take a look at this. No sumps or baffles. Picks up every last drop.
https://www.holley.com/products/fuel_systems/hydra...
Take a look at this. No sumps or baffles. Picks up every last drop.
https://www.holley.com/products/fuel_systems/hydra...
Gassing Station | Kit Cars | Top of Page | What's New | My Stuff