Ok if I add the instructions below the sequenced picture?...that will keep the picture & instructions together for one to reference.....and/or print.

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1965 Dart 110k, 225, Carter BBD Super Six, 2 1/4 single exh., sbp manual scarebird front disc, 7 1/4 rear 2.94 sure grip, 14 x 4.5 OEM wheels, 833 OD with hyd. throwout bearing, HEI, electric fan, ram air/heated air, Accusump. http://plymouthcarclub.com/

Question: can't one listen to the fillup, to the air rushing out that is, and just stop before the splash? Yeah, one might miss out on an extra half-gallon or whatever. Or slowly add fuel past that, for however long wants to.

If it matters, could you just pull the nozzle out and slowly fill up to the top? [Presuming that you are going to drive a few miles, burn off what is in the filler neck, and you aren't worried about issues with a charcoal canister.]

Sometimes...
...Never.
I have to guess you've never owned an early A-body.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

No, I have not. Not trying to be wise-guy, just wondering why that isn't a solution.. On my late model car, I routinely top off to the brim; but it lacks a canister (diesel powered) and the auto-shutoff does work properly.

I mean, if I owned an A body, I'd probably would want a fix too; but just not filling to the top seems like a cheap/easy fix.

I live in Oregon, but I have befriended one gas station and they are kind enough to let me pump my own gas After spilling gas down the side of my car for the 10th time they just hand me the pump and give me the .10 or .20 cent discount! I just keep some towels in the back seat and a gallon jug of water in my car, so if it does spill I just wipe it off, no harm yet. It would be nice to fix this in the future though, but it doesn't bother me too much yet.

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Annabelle: 1970 Dodge Dart Hardtop
1991 Nissan 240sx (sileighty) Lots of mods
1974 Dodge Dart *Wrecked*

'cause it's not. Until you've lived with this problem on these cars, you don't get a clear picture of just how big and unavoidable a problem it is. Not til after you've tried every variant of "Maybe if I just…" and run out of "Maybe the nozzles they have at this station won't…".

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Unless your gas gauge doesn't work like mine doesn't......

I fill the tank so I know I won't run out.

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

I wrap a rag around the base of the gas pump neck, AND hold the pump handle as elevated as possible while filling, and use lowest flow setting on the pump handle. I do not leave it and walk away. I have no problem hearing the rush of air/fuel when it's almost full, but I usually run it up to the top and let the rag soak up the spill. This works almost all the time on my '64 Dart. Yes, I have also thought about relocating the neck, or just running an in-tank-pump fuel cell in the trunk with a top-mounted neck.

On my '68 Dart (higher angle filler neck), I can walk away and leave the rag there and it usually catches any spill.

Lou

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Home of Slant6-powered fun machines since 1988

Gee, I wish I had thought of THAT.

It's not hard or expensive, and does reduce the splash to a degree.

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"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

How are these tanks vented? My dim recollection is that the auto-shutoff pump works on the escaping air from the tank. Is there a vent line to under the hood? Seems like these early vehicles would have used vented caps though. But any air leak elsewhere can't possible help.

But I think I understand the issue: short filler neck, and a large diameter one at that. Fuel nozzle likely can't sense well the rush of air coming out. Hence Dan's unleaded fuel resistricter, and/or relocating of filler neck (more neck space to absorb splash). Seems if you used a rag to seal off the neck "fully' you'd likely get false shutoffs; too loose and all it does it catch the overflow. But with the appropriately sized restriction... Like the appropriate unleaded fuel restrictor...

Sorry for my diversion. Just playing catch-up.

Edit: it appears everything I can find via google is that the fuel pump nozzle works off a pressure change in the fuel filler neck, not just escaping air. Most links indicate that they click off when fuel reaches the nozzle, blocking off the sensing tube as mentioned [url]http://www.pa.msu.edu/sciencet/ask_st/122591.html]here[/url].

Installation instructions & pictures can be found at:
http://www.flickr.com/photos/donpal/639 ... hotostream

Theory summarized:
Gas rushing up the filler tube is suppose to click off the gas nozzle due to a pressure buildup before gas pours out the filler tube.

The design works for steep sloped filler tubes or non-leaded restricted filler tubes however for early A body short, shallow slope, filler tubes enough gas manages to get around the nozzle and up to the top of the gas filler tube before the nozzle can react & shut off.

Installing an unleaded gas restrictor plate in the Early A body filler tube effectively reduces the volume of gas that can get past the nozzle before the nozzle clicks off from the buildup of pressure below the restrictor plate.

Using a restrictor plate with a flapper further assists in reducing the amount of fuel that can spill out the filler tube vent(located 1.5 inches back from the non vented gas cap) during sharp turns or sudden grade changes when the tank is filled.

The restrictor plate does not seal to the filler tube which allows for further venting of the gas tank. It's location is slightly deeper than the stock internal venting baffle holes visible from the gas cap area.

Restrictor Plate Application & Installation:
Modifying the selected model to reduce it's diameter to fit into the opening & properly lock to the ID of the filler tube requires snapping off only half of the restrictor upper flexible tangs.

The attachment shows where the tangs should be snapped off as well as a method to insert & position the restrictor plate in the gas filler tube using a tapered dowel.

The restrictor plate must be located about 2.7 inches back from the flange of the tube to insure proper venting of the tank to the filler tube vent which is about 1.5 inches back from the flange. Verify two things: that the internal baffle vent holes are visible (look from gas cap location) & the vent line is not covered by the restrictor plate.

A step by step instruction is provided in the referenced document.

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1965 Dart 110k, 225, Carter BBD Super Six, 2 1/4 single exh., sbp manual scarebird front disc, 7 1/4 rear 2.94 sure grip, 14 x 4.5 OEM wheels, 833 OD with hyd. throwout bearing, HEI, electric fan, ram air/heated air, Accusump. http://plymouthcarclub.com/

Directly to atmosphere via a steel line that runs up into an upside-down U in the trunk and then back down through the trunk floor.
No.
No.
The issue is the horizontality of the filler pipe.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Cool! Y'mind if I also host this image as a backup/mirror?

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Oh, I get it now--I'm just incredibly dense. Where the filler is horizontal, by the time gasoline fills the filler tube to the point where it could touch the nozzle (and thereby shut off fuel flow, via the auto-shutoff) -- it's already flowing out of the filler.

Exactly right!

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一期一会
Too many people who were born on third base actually believe they've hit a triple.