Holley On Crossflow / Fuel Pumps Question

[Anonymous]

This is one last attempt, prior to pulling my fuel tank out, at an easy way out. Do they make an old style fuel pump(without return line) that will fit a crossflow engine, or will a log motor fuel pump fit? I was going to plumb it to a Holley. I'm down to the fuel line on getting my Comet going. It is not equiped with a return fuel line to the tank. The Webber requires a return line to work properly if I understand it right. So I'm thinking I could either run the Holley with an old style pump or pull the tank to plumb a fitting for the return line. I guess return line fittings are standard in size?Would I better off at this time to mount a tank mounted fuel pump like say is in a Mustang or is the engine mounted fuel pump sufficient? I will be pushing the engine. How about an external mounted fuel pump and regulater? Is this a good option? How much fuel presure does the Weber two barrel require? Holley?

Any opinions or thoughts are appreciated. As mentioned above, this is the last thing I have to do prior to cranking the crossflow transplant. I'm starting to get excited.

Dave

 

[addo]

I think the fuel pumps interchange between Australian sixes pre and crossflow. You would have to swap the arm on a US pump.

Now, I really really suggest an external pusher pump like a Carter - never a Holley, return line and bypass regulator. This means that you would avoid the pressure creep and temperature issues associated with a non-bypass regulator, the car is enabled for EFI (with a return line in place; all you would need alter is selecting a high-pressure pump), and the issues of dealing with another Oz-specific part (the fuel pump) are removed.

Does this help?

Adam.

 

[Anonymous]

I was trying to avoid running the return line. Thus the idea of running the US pump and a Holley carb. How about, running a regulator behind the US pump? Could I lower the presure and get away with running the Webber?

 

[xctasy]

Many people want to just use a simple pre 1983 style fuel delivery system, becasue it looks simple and simple is gooood!

Good new is that the X-flow's with return lines give you heaps of options without expense


1) My preference is to do what Does 10's did on his 63 Falcon, and that is so simple its a crime of pure genius. Just plumb up a return line to the fuel tank breather line, and dump raw fuel from the return line into the fuel tank. If the hose is beside the existing fuel line, and of simialr quality, it will be the cheapst thing to do.

Other options are

2) If you decide to block off the return line, you have to run a Carter or Holley fuel regulator close to the carb.

3) use the imported 1971 to 1982 XY to XD Falcon fuel pump top body, which has no return line, and fits to your XE fuel pump. Run a Carter or Holley fuel regulator close to the carb.


4) or spend a few hours adding the US 200 or 250 Carter fuel pump with the Aussie lever, running a Carter or Holley fuel regulator close to the carb.


Why is the return line used?

The reason Ford Australia added it to everY Weber equiped Pinto engined four cylinder since 1973, and every Weber equiped six cylinder from mid 1982 was because of

1. fuel vapourisation (hot fuel handling problems),
2. fuel leaks (Webers leak fuel above 5 psi),
3. hydrocarbon emissions,
4. fuel fires,
5. and the quest for better fuel economy (lower needle and seat pressures reduce the over supply of fuel on bumpy or hard cornering conditions).
6. Before the advent of return lines, all Cortinas and Falcons had chronic fuel surge problems around corners because of fuel starvation. Weber AD carbs with return lines are just brilliant in that situation, because they were orginally used in the French Simca 180's with soft suspension, and the Weber AD series used in these were resistant to fuel surge.

Eliminate the return line, and all six items become issues. Even ripping off the evaporative emissions increases green house gas emission by 20%!


In the XE to XF engines, the Weber ADM 34 recieves 5 to 6 pounds of pump pressure, just like the early ones. What is different, is the carb bleads off the other 2 to 2.5 pounds of pump pressure by virtue of a 0.5 mm bleed line out of the needle and seat valve. So the carb only sees 2.5 to 3 psi tops in operation.


As a final note, American Fords started having return lines in 1983 when the 4180 series cars got used on Mustang 5.0 HO 4V and the F150 5.8 trucks.


Deano

 

[Anonymous]

The pump on my crossflow has one marked "in" and one "out". There is a plug below the out Maybe that is for the return?. Are you guys saying I should run a return line from that plug to the tank? My carb choice is still up in the air right now.

 

[MustangSix]

The US pump will work on the Oz crossflow as long as there is an eccentric on the cam. No arm swapping needed.

 

[Anonymous]

Here's a kit I found to run the return fuel line to the filler neck of the gas tank.

http://www.moroso.com/catalog/categoryd ... Code=32029

 

[xctasy]

That's it. Well done, mazeltof, and happy hunting! Get excited!


http://www.moroso.com/catalog/images/65385_part.jpg

You have any number of options now!

I have the stock XD 1981 fuel pump downstairs. The XD and XE were tha same pump, different top. I can't take photos or help out at the moment.

Current parts inventory on Weber ADM 34 in NZ and Aussie is complete. No issues getting any part at all.

I'd use the return line if you can. Use all the pipes, use all the fittings, and you'll be very happy with it.


If you plan to use

* either the Holley 2-bbl or 1946 Holley on the 2-bbl Aussie manifold,

and

* the US fuel pump,

you may run into some jetting issues since Aussie 250's do another 40 hp extra, so even a 300 I6 carb may struggle, but it looks like it will work. You have to sort out a linkage, a 5 mm adaptor plate, and if that seams easier to you than just the No. 65385 Moroso adaptor, then go for it.

I love Fords. Many ways of getting a result, no one answer!

 

[Anonymous]

Hello,
I'm going to run the return line to the filler nozel. This will allow me use the existing pump and the Weber ADM carby. One issue I have is that all the vacume lines and plastic fittings/splitters are busted up and just dangling everywhere. I have know idea where a lot of these go to or where they came from. I kind of need a diagram or a good up close picture of a Crossflow w/ Weber carb to help with redoing all these lines. Also, I need to figure out how to route the water lines through the head and intake. So if anyone has a pic I would very much appreciate it.
I've disposed of the EGR and used the plate you sent to cover up the hole on the intake. Good thing too as theres only about a 1/2 inch between that plate and the shock tower. So now tell me more about this 1946 Holley and how the Aussie carbys are getting 40 extra ponies. Thanks so much guys. I love this board. It's the only one I visit and love how everyone is profesional while they do the things they love. That would be building Hot Rods and sitting around talking about them. See you soon.
Dave

 

[Vaughano]

I kind of need a diagram or a good up close picture of a Crossflow w/ Weber carb to help with redoing all these lines.

I might be able to help you there. I just fixed all that stuff up myself, and got the info photocopied from the Gregory's at the local library. I could probably post some pics of my Xflow too, seeing how it's now a stock emmission setup.

If I can find the copies when I get home (I'm at work) I'll scan them and get them to you somehow. It's only 8-10 pages so I wouldn't think there'd be any copyright probs.

 

[Vaughano]

Sorry I can't find the info.

I'll try and remember to post some pics of the stock setup.

 

[Vaughano]

Here's an old photo, but it doesn't show much.

 

[Anonymous]

Thanks so much for the pic. I was looking for this. I'm almost ready to see if this thing will fire...
Dave

 

[Vaughano]

Good luck Dave.