help on drag fuel thingo can do hicky

[MattyB]

before i get my car tunes im going to be fitting my o44 fuel pump ive got sitting in ma room. i figure that using one of those drag type canisters would be the easiest way. thing im not sure about is the plumbing most ppl use, the wiring and the size needed for this item.

Breather line to connect with fuel tank breather line

__|__

| |- return to tank

| |- feed from tank

| |

| |- feed to 044 pump.

-----

this seems the logical way of hosing the item to me, but thought i would just check incase the return from engine needs to be plumbed into there also. with the wiring i would considering wiring a relay to power the 044 fuel pump that is turned on and off by the power/earth from the original fuel pump and then wire the original one to pump continually. does this sound about correct to everyone?

last thing im not sure on is how big this needs to be. anyone have any idea of size. i have some alloy pipe 51 mm inside diam 8mm wall thickness. i was considering using this and making it as high as would fit. would this do?

any help would be great

Thanks

Matty B

[strutto]

MattyB,

I think they are usually called a swirl pot. I've never seen one with a breather.

I think you would be better off swapping the tank return and feed around. ie the feed should be above the return.

If you don't plumb the return from the engine into the swirl pot then your intank pump must be able to flow enough fuel to supply the high pressure pump (your 044).

Not sure what the flow ratings are of the standard pump at low pressure?

If you do plumb the return from the engine into the swirl pot (as opposed to back to the tank) then your fuel temperatures will rise if the swirl pot volume is not large enough...

Using your pipe, if you make it at least 200mm high, you should have plenty of volume...

Hope this helps...