One for the fuel swirl-pot guys

[Pupp]

What size line did you run from the pump(s) to the rail (guessing -6 or -8) and what fittings did you use for tank and rail connections?

[Pupp]

Anyone able to confirm the adaptor thread needed for the fuel rail in from the pump is M12x1 male (ie to mate to the rail)?

[Pupp]

No bites on this but lets persevere...

This time the query is lift pumps - am assuming, if I need one (suspect I will with the configuration of the Torques pot I will be using - image below), that I can just use the original EFI pump for keeping the swirl pot topped - EFI duties will be undertaken by an 044. Thoughts?

[carsy]

Sorry Gary, i`ve no idea on this one.

I am however intrigued to learn the reasons behind the fuel swirl pot.

I`m assuming its to prevent any occasional brief shortage of fuel to the rail.

Why should more power make this to occur though. If the standard tank is baffled and works for standard cars, surely a bigger 044 pump will get enough fuel up to the engine ok.

Or am i missing something. I presume i am.

[Pupp]

To try and secure consistency of supply regardless of fuel level in the tank and to counter slosh and surge - lean outs due to starvation are bad news with FI under boost and even very brief uncovering of the tank outlet could cause damage. I am already well out of flow capacity with the standard lines and pump at slightly increased 3 bar rail pressure using less than half a bar boost so, accepting I need to run bigger lines anyway, the swirlpot is an easy and effective way to support this. Added bonus is it keeps the key components together and out of the hostile environment of the wheel arch, albeit by compromising boot space.

I did consider just running the 044 off the tank without a pot (I like simple) but having used a digital SPA ful gauge for a year now, it is very obvious that whatever baffling is present (there is little in mine), is pretty ineffective in preventing fuel surge, especially under acceleration and cornering..

[phazed]

Ian, my car needs a swirl pot as I get starvation within 60 miles of a full tank on track.

[Hoofa]

I went a different route as didn't want a load of pumps, new tank made by pro alloy with built in tank swirl chamber, then went with a walbro 450gts in tank pump, no complaints other than trying to get a sender to work with the tvr guage

This was solved using atl fuel sender from demon tweets and a recalibration of the fuel guage to match

[Pupp]

Still working this out for simplest install - can anyone who has had the tank out describe for me how the return line is routed please, and especially how it enters the boot space. I think the return port is on the back, pointing forward about two thirds up - does the return line go straight through the bulkhead somehow or is it routed around the boot in some manner?

[carsy]

Just as you describe Gary and yes straight through the bulkhead straight on to the tank.

[Alexdaredevils]

Yhm

[Pupp]

Nothing received today Alex?

As you've probably guessed, am sussing how to use as much of the existing stuff as poss to feed the SP and new pump, at least as an interim measure. Although not ideal as a lift pump, seems the oem pump should be ok and heating/current draw not an issue with it running free flow.

[Pupp]

Just to resurrect this - trying to suss the best location for the swirlpot and 044 pump combo (plus a lifter pump) and whilst that *could* all go adjacent to the tank in the boot (in fact amidships in front of the tank on the boot floor looking from behind the car is perfect for fuel flow and connection function), that just seems far too vulnerable to me in the event the rear of the car takes a hit. Seen far too many Tivs chopped off at the tank

So... other suggestions? Maybe reshaping a recess into the rear bulkhead/shelf and putting it all cabin side of the tank (firewalled from the cabin obviously)?

Or, reluctantly, abandon the SP and just use the 044 in original position fed by gravity and uprated hoses...?

[Discopotatoes]

I ran an8 from tank to lifter pump then an6 to and from the rail, and it just fits in the same place as the old copper lines, an 8 was a bit tight and pinched where it went over the out rigger tubes

[Discopotatoes]

Pupp said:

Still working this out for simplest install - can anyone who has had the tank out describe for me how the return line is routed please, and especially how it enters the boot space. I think the return port is on the back, pointing forward about two thirds up - does the return line go straight through the bulkhead somehow or is it routed around the boot in some manner?

It goes through the bulk head at the bottom then there's a thin bit of grp which creates a small space separate from the boot it goes into this then return at the top of the drivers side tank

[Discopotatoes]

Pupp said:

Just to resurrect this - trying to suss the best location for the swirlpot and 044 pump combo (plus a lifter pump) and whilst that *could* all go adjacent to the tank in the boot (in fact amidships in front of the tank on the boot floor looking from behind the car is perfect for fuel flow and connection function), that just seems far too vulnerable to me in the event the rear of the car takes a hit. Seen far too many Tivs chopped off at the tank

So... other suggestions? Maybe reshaping a recess into the rear bulkhead/shelf and putting it all cabin side of the tank (firewalled from the cabin obviously)?

Or, reluctantly, abandon the SP and just use the 044 in original position fed by gravity and uprated hoses...?

If you haven't already bought the twin 044s this is worth considering , 2 Ltr swirl pot with 380 Lph aem o44 style pump @ 43psi. Good for over 1200 hp


Lift pump in situ behind a very simple bracket

Edited by Discopotatoes on Sunday 26th February 21:14

[neal1980]

Here's mine I used -8an fitting feed and return, 2 x bosch 044 and 2 facet silver top lifter pumps. Modified the tank for outlets at the front as you can see.

[Pupp]

Thanks Both - are the Facet pumps up to keeping pace with the likely demands (appreciate full boost is never held for long)?

That's exactly where I had identified to tap a new outlet Neal but still wary of the vulnerability of the boot area in a smack... probably just over-thinking it and never wiped the back off yet

[Discopotatoes]

Pupp said:

Thanks Both - are the Facet pumps up to keeping pace with the likely demands (appreciate full boost is never held for long)?

That's exactly where I had identified to tap a new outlet Neal but still wary of the vulnerability of the boot area in a smack... probably just over-thinking it and never wiped the back off yet

What power are you aiming for? And are you going for a return or non return?

[77racing]

If it is of any help I run a 2 lt SP with two red top lift pumps and just one 044 to rail via a fuel pressure regulator. Never had any fuel issues with 600bhp and very fat slix.

[77racing]

[quote=Discopotatoes]



Shirley you will need access to that pump to clean the filter in the bottom of it. not sure why you would want to hinder access to the bottom of that pump, just asking like