To swirl pot or not to swirl pot - that is the question

[martinclan]

I have got to the point now where I am connecting up the engine to the electrics and fuel supply and the use of a swirl pot is causing me to think hard.

I am a bit concerned about using the Marlin supplied swirl pot (really a surge tank) as

1. It is mounted on the bulkhead with the battery one side and the fuse box the other. I not sure that the SVA people will be to keen on this mixture of fuel and electrics.

2. It means using two fuel pumps and lots of extra connections in the fuel system - all more to go wrong.

I am now thinking about modifying my fuel tank to add a baffle instead. OK so its gonna cost (more) money but I am beginning to think it might be the better solution. What do you all think? Come on lets have some good discussion on this!!

Regards

Robin

[ajgcurtis]

Re: To swirl pot or not to swirl pot - that is the question

Drill a 12mm hole in middle bottom of fuel tank.Make a cone 160/200mm diam and 75mm deep with two pipe outlets. Weld the cone to the underside of the tank with the hole in the middle of the cone. There is ample room as the diff is 75/100mm lower.

[r.norman227]

Re: To swirl pot or not to swirl pot - that is the question

Thanks Andrew - don't suppose you have any pictures?

[paulhyder]

Re: To swirl pot or not to swirl pot - that is the question

Let me know your email address and I will send you some images as an attachment. Mine is ajgcurtis(at)aol.com

[cabrioman]

Re: To swirl pot or not to swirl pot - that is the question

Hi Robin,

Just to add to your good discussion, I have just passed the SVA with my sportster and all is OK with the Marlin swirl pot design.

1.No comments from inspectors at Birmingham test centre on its position next to the battery box.

2. No loss of fuel suction on corners, fuel pressure OK at full power.

3. Electrics, just put another relay in the circuit.

Go for it Robin.

[pnutter21]

Re: To swirl pot or not to swirl pot - that is the question

Hi John,
Great news on your SVA pass, Well done!

Anything else from a SVA perspective that we should be aware off ?

Peter

[marcos67uk]

Re: To swirl pot or not to swirl pot - that is the question

JOHN, WELL DONE WITH SVA. wHAT ENGINE DID YOU USE?DO YOU HAVE ANY FURTHUR ENGINE BAY PICTURES?

[Patrick]

Re: To swirl pot or not to swirl pot - that is the question

Well done on the SVA pass, I would also much appreciate any Sportster related issues that came up.

Thanks, Patrick

[Patrick]

Re: To swirl pot or not to swirl pot - that is the question

I've just noticed that Marlin have started selling a tank with a sump in there new price list:

http://www.marlinracing.co.uk/prices/sp_ind_price_list_191205.doc

"1 x Aluminium 8 Gallon Fuel Tank (with new anti-surge sump)"