Page 2 of 3 < 1 2 3 >
Topic Options
#2406250 - 11/20/17 05:57 AM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: fastmark]
sogtx Offline
master

Registered: 07/25/03
Posts: 4781
Loc: upstate western ny
Lol
I installed a 035 mig welder tip in the return hose after
connection - it fit snug in the rubber return line
Havent lost fuel pressure Or vapor locked in a while.

Top
#2406384 - 11/20/17 01:16 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: Furious440]
RS23U1G Offline
Moparts Torchbearer

Registered: 04/19/12
Posts: 18620
Loc: Detroit
(Put a three outlet fuel 'filter' in there and fuggitaboutit...

Been running one for many moons...

Zero issues...


Top
#2411838 - 12/01/17 01:13 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: RS23U1G]
gygeneral Offline
super stock

Registered: 09/07/07
Posts: 886
Loc: Ont, Canada
After reading this post I decided to check mine as I've always had issues starting the car after sitting after a period of time. I actually had to put fuel directly into the fuel bowl for it to start. Heres the pic of the return line, full hole, maybe this is my issue. When I disconnected the hose it was full of fuel.


Attachments
IMG_20171201_125640.jpg



Top
#2411839 - 12/01/17 01:14 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: Furious440]
PurpleBeeper Offline
mopar

Registered: 07/05/11
Posts: 671
Loc: Chicago
Sorry to Hijack, but I have a related question. I'm running a 440 six pack that does suffer from vapor lock issues. I have an electric blue Holley pump regulated to 6psi.

I was thinking about using the stock fuel line as my return. Since I'm not running a mechanical pump at all, will adding the vapor separator (with .060" hole) help me???
_________________________
70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"

Top
#2412196 - 12/02/17 09:42 AM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: gygeneral]
biggE Offline
super stock

Registered: 12/08/04
Posts: 806
Loc: California
Originally Posted By gygeneral
After reading this post I decided to check mine as I've always had issues starting the car after sitting after a period of time. I actually had to put fuel directly into the fuel bowl for it to start. Heres the pic of the return line, full hole, maybe this is my issue. When I disconnected the hose it was full of fuel.

There should be zero fuel in the return line. The other issue that I believe is with the fuel separator that you have is that the tube length in the unit is to short. Either way I would replace it.

Top
#2412321 - 12/02/17 03:13 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: biggE]
gygeneral Offline
super stock

Registered: 09/07/07
Posts: 886
Loc: Ont, Canada
Originally Posted By biggE
There should be zero fuel in the return line. The other issue that I believe is with the fuel separator that you have is that the tube length in the unit is to short. Either way I would replace it.


I ordered a new one from Frank B.. I'm going to open this old one up and look inside when I remove it from the car.


Edited by gygeneral (12/02/17 03:14 PM)

Top
#2412356 - 12/02/17 04:52 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: Furious440]
tman Offline
enthusiast

Registered: 08/21/07
Posts: 376
Loc: WA
Good idea opening it up. Do send pics of it.

Top
#2412736 - 12/03/17 03:03 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: gygeneral]
RealWing Offline
enthusiast

Registered: 04/24/11
Posts: 200
Loc: Ontario, Canada
Originally Posted By gygeneral
After reading this post I decided to check mine as I've always had issues starting the car after sitting after a period of time. I actually had to put fuel directly into the fuel bowl for it to start. Heres the pic of the return line, full hole, maybe this is my issue. When I disconnected the hose it was full of fuel.


There were many bogus separators in the marketplace. Besides the return line having no orifice, there was no screen inside and the tubes were the incorrect length!!!! This is one I bought for my 6bbl - junk. Your return tube looks like mine - with no orifice, so I suspect it is a bogus one.
Jim


Attachments
IMG_8182.JPG

IMG_8181.JPG


_________________________
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2015 BMW K1600 GTL

Top
#2412866 - 12/03/17 08:27 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: tman]
gygeneral Offline
super stock

Registered: 09/07/07
Posts: 886
Loc: Ont, Canada
I opened mine up today, the orifice is wrong but the tubes inside appear to be the correct lenght and has a screen.


Attachments
IMG_20171203_120626.jpg



Top
#2413527 - 12/05/17 09:50 AM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: Furious440]
fastmark Offline
master

Registered: 01/20/03
Posts: 4509
Loc: Abilene, Texas
I’m not an expert but I have my oem one from my Superbird that I have measured and compared to two ones that I have bought. The first was from Year One and had the big (.115 ) hole in the return line. Using a wire with a hook on it, I determined that all three units had the exact same length tubes as my oem. The other unit I bought had the proper size hole as the oem one did. It was not made as clean but it was .060. I’m not sure if it has the screen or not. I bought three of them and just used one on my Charger to replace the new and wrong Year One piece. I’ll see if I can find where I bought these three from. I’ll try and post a picture as well.


Attachments
86AE6904-21C6-4242-8659-456535343A60.jpeg




Edited by fastmark (12/05/17 09:55 AM)

Top
#2413533 - 12/05/17 09:57 AM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: Furious440]
fastmark Offline
master

Registered: 01/20/03
Posts: 4509
Loc: Abilene, Texas
This new phone will not let me see the attachment but the oem is on the left, the small hole is in the middle and the big hole YO unit is on the right.

Top
#2413857 - 12/05/17 07:03 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: fastmark]
68jim Offline
super stock

Registered: 11/25/03
Posts: 958
Loc: Southeast Virginia
You may find that even the .060" hole can be too big. I discovered on my engine that the larger hole allowed a 2+ psi drop on the fuel pressure measured at the carbs. I soldered the hole closed and drilled it out to .030". My pressure loss was now less than 1 psi and still large enough to pass any vapor and fuel back to the tank. Zero issues even in 95+ degree heat.

Top
#2413942 - 12/05/17 09:02 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: 68jim]
RealWing Offline
enthusiast

Registered: 04/24/11
Posts: 200
Loc: Ontario, Canada
Originally Posted By 68jim
You may find that even the .060" hole can be too big. I discovered on my engine that the larger hole allowed a 2+ psi drop on the fuel pressure measured at the carbs. I soldered the hole closed and drilled it out to .030". My pressure loss was now less than 1 psi and still large enough to pass any vapor and fuel back to the tank. Zero issues even in 95+ degree heat.


I agree- 0.060" is too large. I soldered mine and drilled with a 0.040" drill.
_________________________
1970 Superbird 440-6bbl, auto
1969 Barracuda 340-4bbl, FB Formula S auto
1969 Barracuda 6.1 L Hemi, 5 speed, Convertible
2015 BMW K1600 GTL

Top
#2414019 - 12/05/17 10:53 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: RealWing]
gygeneral Offline
super stock

Registered: 09/07/07
Posts: 886
Loc: Ont, Canada
Do you need that return line at all. Isn't that part considered a polution control device. What would happen if you blocked it all together.

Top
#2414031 - 12/05/17 11:16 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: gygeneral]
71birdJ68 Offline
master

Registered: 02/09/12
Posts: 3770
Loc: Morristown Tn.
It's there to prevent vapor lock, but also, if you plugged it up, it could cause the fuel pressure to get to high.

Top
#2414610 - 12/07/17 08:27 AM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: 71birdJ68]
gygeneral Offline
super stock

Registered: 09/07/07
Posts: 886
Loc: Ont, Canada
Originally Posted By 71birdJ68
It's there to prevent vapor lock, but also, if you plugged it up, it could cause the fuel pressure to get to high.


what about the cars that only have a fuel filter, how do they get away with no return line. I guess it must be vented somewhere then?

Top
#2415749 - 12/09/17 12:30 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: gygeneral]
sogtx Offline
master

Registered: 07/25/03
Posts: 4781
Loc: upstate western ny
they vent from boilin over and floodin your engine when it sits on a hot shut down .

i was very sucesful with the mig welder tip ..

Top
#2443699 - 01/30/18 07:34 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: biggE]
sogtx Offline
master

Registered: 07/25/03
Posts: 4781
Loc: upstate western ny
Originally Posted By biggE
Originally Posted By gygeneral
After reading this post I decided to check mine as I've always had issues starting the car after sitting after a period of time. I actually had to put fuel directly into the fuel bowl for it to start. Heres the pic of the return line, full hole, maybe this is my issue. When I disconnected the hose it was full of fuel.

There should be zero fuel in the return line. The other issue that I believe is with the fuel separator that you have is that the tube length in the unit is to short. Either way I would replace it.


I disagree

Top
#2444455 - 01/31/18 11:47 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: sogtx]
Morty426 Offline
master

Registered: 03/12/08
Posts: 7653
Loc: Sacramento CA
Originally Posted By sogtx
Originally Posted By biggE
Originally Posted By gygeneral
After reading this post I decided to check mine as I've always had issues starting the car after sitting after a period of time. I actually had to put fuel directly into the fuel bowl for it to start. Heres the pic of the return line, full hole, maybe this is my issue. When I disconnected the hose it was full of fuel.

There should be zero fuel in the return line. The other issue that I believe is with the fuel separator that you have is that the tube length in the unit is to short. Either way I would replace it.


I disagree


Yeah E that's not right. It's a fuel return line.

Top
#2444935 - 02/01/18 08:34 PM Re: '71 440 HP VAPOR SEPARATOR experts please! [Re: Morty426]
biggE Offline
super stock

Registered: 12/08/04
Posts: 806
Loc: California

I disagree [/quote]

Yeah E that's not right. It's a fuel return line. [/quote]
It's actually a vapor return line. Fuel can run through the line but if there's fuel in it something is likely wrong like a blocked fuel line or clogged separator.


Attachments
vapor seperator.jpg




Edited by biggE (02/01/18 08:48 PM)

Top
Page 2 of 3 < 1 2 3 >

Advertisement
Sponsored Link
Forum Stats
25,260 Registered Members
32 Forums
189,019 Topics
2,204,476 Posts

Most users ever online: 882 @ 03/05/17 10:15 PM
Moparts Newest Topics
Dipstick hole plug
by bigdad
20 minutes 24 seconds ago
1972 Roadrunner Speedometer Bounce
by jim6346
28 minutes 16 seconds ago
82 /6 SHORTBOX BOISE AREA $4500
by bigdad
43 minutes 25 seconds ago
NHRA Div 3 Norwalk race Tech Inspection
by HR3128
Today at 09:38 AM