efi fuel systems

[baz]

I'm looking for ideas and advice on efi fuel systems, ie fuel tank set up,  fuel pump, filter and regulator.

I currently have this fuel tank mod with small sump and return line fed up through the tank. I'm not keen on the flared ends and push on fittings.



I've this unknown fuel pump



This filter



And this regulator




Any thoughts on how good or bad this set up is?

Would love to hear from anyone running efi on their set ups.

[richie]

Mine on 67

stock tank with -8 fitting tig welded onto bottom in factory position then another near it but slightly nearer firewall for return, also -8 on filler neck for breather

Then filter before pump, up to fuel rails, then to reg and back to return all with screw on fittings, no push on stuff.

I don't recognise the pump or reg you posted so cant comment on how good or bad they are

cheers Richie 

[baz]

Thanks Richie,  the regulator is weber.

So you don't run a sump on your tank? Also is your regulator after the injectors??  Sorry but I'm clueless on this and I want to get mine sorted out now before the car is ready to run.

[Chip]

I run all -6 teflon lined hose. I tapped the fitting on the bottom of my tank to be 1/4" NPT, run my return into that. I have a large Walbro 350 or so lph pump hanging in my tank, with a single hose coming out of the top. I have a filter mounted to the bottom of the pump, then a large screw on canister type after it, then it goes to the rails/injectors, then to the Mallory regulator, then through a flex fuel sensor, and into the bottom of the tank.

[modnrod]

I'm putting a 1584 with Solex in mine........but later I might like EFI when I get bored playing with dinosaurs again, so......

AN-6 fitting into stock tank outlet, feeds down to BIG (6" x 2.5") fuel filter which can be replaced with a mini-tank/filter/pump when or if I choose to go EFI, I went for big-volume filter so with mechanical pumps for now I won't get vapour-lock in our heat. It all sits above the brake M/C against the front wall. My tank vent is still stock 1303 (Oz L-Bug).

Solid steel 5/16" line all the way through to the engine bay, where it can then in the future feed rails and a regulator if I wish (but for now the stock mech pump).
The stock 1/4" fuel line remains all the way as a return line from the regulator in the future, then I just need to put a return fitting in the tank and I'm done. I have AN fittings for the carb/pump stuff for now, but will probably go to factory OEM EFI quick-disconnects when I convert just for peace-of-mind.

All the systems I've done I always try to use locally available and reliable parts from common local cars, eg. regulator, pumps, filters, injectors, throttle body, O2 sensor, that way parts are easy to get and the people you may need to ask advice from will be familiar with the bits. OEM stuff is cheap and reliable.

Size your injectors up, throw a few wires into something that goes beep, turn the key and drive away.

[baz]

How do you get an in tank pump in there? How is it attached?

Interesting that most folk are running standard tanks and just modifying the outlet.

[Rocket Ron]

CB do a fitting for the bottom of tank for flow and return in one

[baz]

CB do a fitting for the bottom of tank for flow and return in one

I've been looking into these,  I've read that they aren't ideal as the returning fuel is recirculated again rather than cooling off in the tank.

[baz]

Mine on 67

stock tank with -8 fitting tig welded onto bottom in factory position then another near it but slightly nearer firewall for return, also -8 on filler neck for breather

Then filter before pump, up to fuel rails, then to reg and back to return all with screw on fittings, no push on stuff.

I don't recognise the pump or reg you posted so cant comment on how good or bad they are

cheers Richie 

Richie what pump and regulator are you using?  I want to find something that accepts an fittings on all connections.

[broen messiaen]

this is how i'm changing my car at the moment:
old filter from carb setup -> bosch 044 pump-> extra filter-> end of car. (crappy self phone pictures)



the fuel tank i modified like this, 2 an6 fittings welded on a plate and tig' welded that to the tank

[baz]

It gets busy in there with all that kit. I like the idea of in tank pumps from the tidiness point of view, but the ones I've found that accept an fittings for the outlets look crazy expensive.

[Chip]

How do you get an in tank pump in there? How is it attached?

Interesting that most folk are running standard tanks and just modifying the outlet.

Here is the pump I run, good for nice high pressures and good flow.

http://www.ebay.com/itm/152435882431

I bought a few bits from tanksinc.com and made it all fit. I'll try to get a few photos up later.

[Chip]

[baz]

Thanks chip,  those pics help make sense of how it all works. Also should be easy for me to pick up a used pump here for small money. Would a pump donor Mercedes come equipped with a suitable regulator too?

[UltraOrange67-2443]

I got this kit

https://www.aeromotiveinc.com/product/phantom-200-stealth-fuel-system/

[baz]

I got this kit

https://www.aeromotiveinc.com/product/phantom-200-stealth-fuel-system/

I was looking at those earlier, very nice set up but a little pricey for me atm

[Chip]

Thanks chip,  those pics help make sense of how it all works. Also should be easy for me to pick up a used pump here for small money. Would a pump donor Mercedes come equipped with a suitable regulator too?

No idea on the regulator. I use a 0-100psi Mallory reg. Pretty sure that pump comes from a beast of a Mercedes. Also, the hose i used inside is not that stuff,but a purpose built in tank any fuel compatible hose.

[baz]

Thanks chip,  those pics help make sense of how it all works. Also should be easy for me to pick up a used pump here for small money. Would a pump donor Mercedes come equipped with a suitable regulator too?

No idea on the regulator. I use a 0-100psi Mallory reg. Pretty sure that pump comes from a beast of a Mercedes. Also, the hose i used inside is not that stuff,but a purpose built in tank any fuel compatible hose.

Plenty of beasty mercs knocking around London so hopefully pick up a pump for reasonable money.  I like the in tank pump option so even shelling out for a new one it'll be all OK.

Thanks again.

[richie]

Chip,

do you have any fuel pressure or starvation issues under boost ? just wondered as that tank vent looks a little small to me

cheers Richie

[richie]

Baz

I got a 044 copy pump, aeromotive filter and a magna fuel regulator on the 67

cheers Richie

[Chip]

Chip,

do you have any fuel pressure or starvation issues under boost ? just wondered as that tank vent looks a little small to me

cheers Richie

Not at all. Its the same 3/8" as the rest of the lines hooked to the tank. Fuel pressure stays nice and steady. Injector DC stays well within safe zones  to maintain good afr.

[baz]

Baz

I got a 044 copy pump, aeromotive filter and a magna fuel regulator on the 67

cheers Richie

Thanks Richie, does your return line just go to bottom of tank or have you an extension inside the tank?

[richie]

Just onto bottom of tank

[Fiatdude]

RCI 12 gallon tank with a bunch of aeromotive stuff

[baz]

Just onto bottom of tank

Thanks Richie. 

[PPRMicke]

http://www.nukeperformance.com/products/fuel-surge-tank/'
/// Micke

[andy198712]

CB do a fitting for the bottom of tank for flow and return in one

I've been looking into these,  I've read that they aren't ideal as the returning fuel is recirculated again rather than cooling off in the tank.

I've been using mine on a road car, you have to modify it as when you screw it down the thread bottoms out before the seal compresses. so you need to file it down a bit.

works well though.

going to a high flow filter like the one CB sell. 13mm outlets i think? then to a used bosch pump off a porsche, but same as volvo ect. then to a 8mm barb, to 8mm hard line, then to a subaru filter which has 8mm ends. injectors, then to a Beru 3 bar reg, back to the CB tank fitting.

[broen messiaen]

does anyone use a sensor in the fuel line to check the pressure? thinking about putting one in with a t-fitting and connecting it to the ecu

what is the best pressure to set the regulator is you start a total new setup(baseline)?

[richie]

does anyone use a sensor in the fuel line to check the pressure? thinking about putting one in with a t-fitting and connecting it to the ecu

what is the best pressure to set the regulator is you start a total new setup(baseline)?

Yes I do log fuel pressure, and I set pressure at 45psi without engine running

cheers Richie

[Chip]

does anyone use a sensor in the fuel line to check the pressure? thinking about putting one in with a t-fitting and connecting it to the ecu

what is the best pressure to set the regulator is you start a total new setup(baseline)?

Me too. I think mine is 50ish right now. Too hard to get to very often, so it stays where its at. 43.5 is kind of the standard that most injector flow rates are based on.