Re: hemi & 6bbl vapor separator
[Re: 71birdJ68]
#1768992
03/02/15 02:04 PM
03/02/15 02:04 PM
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Joined: Jul 2006
Posts: 4,179 California
mickm
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Quote:
Call Frank, or Roger Gibson, theirs has the screen inside, but nobody has the correct one with the .060 hole in the return nipple. I took a bolt, and cut the head off, and drilled the hole, and just put it inside the rubber hose, so it does the same thing.
what's with the hole being the wrong size? this only allows vapor from the separator to return to the tank, yes?
Last edited by mickm; 03/02/15 02:05 PM.
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Re: hemi & 6bbl vapor separator
[Re: mickm]
#1768994
03/02/15 02:11 PM
03/02/15 02:11 PM
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Joined: Feb 2012
Posts: 4,449 Morristown Tn.
71birdJ68
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Morristown Tn.
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What year of car are you putting it on? On a 71 the hole restricts the flow back to the tank, if you don't have it your fuel pressure could be low. The service manual talks about on a 71, maybe the earlier models as well. Also, a lot of the repo's don't have a screen, which Franks does.
Last edited by 71birdJ68; 03/02/15 02:13 PM.
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Re: hemi & 6bbl vapor separator
[Re: mickm]
#1768998
03/02/15 11:49 PM
03/02/15 11:49 PM
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Joined: Apr 2011
Posts: 315 Ontario, Canada
RealWing
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Ontario, Canada
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Lots of bogus ones out there and I got one. Could not get the car started - all the fuel was going straight back to the tank because there was no orifice in the return line Cut it open and just short stub lines inside and no screen!! The return line needs a 0.040" to 0.060" orifice.
1970 Superbird 440-6bbl, auto 1969 Barracuda 340-4bbl, FB Formula S auto 1969 Barracuda 6.1 L Hemi, 5 speed, Convertible 2022 Can Am Spyder RTL
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Re: hemi & 6bbl vapor separator
[Re: RealWing]
#1768999
03/02/15 11:50 PM
03/02/15 11:50 PM
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Joined: Apr 2011
Posts: 315 Ontario, Canada
RealWing
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Ontario, Canada
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This is what it should look like
1970 Superbird 440-6bbl, auto 1969 Barracuda 340-4bbl, FB Formula S auto 1969 Barracuda 6.1 L Hemi, 5 speed, Convertible 2022 Can Am Spyder RTL
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Re: hemi & 6bbl vapor separator
[Re: Challenger 1]
#1769003
03/03/15 03:50 PM
03/03/15 03:50 PM
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Joined: Jul 2006
Posts: 4,179 California
mickm
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Quote:
I know everyone want's 3/8" but 5/16" is plenty after the fuel pump. I just want to go on record and say this.
you are right, i'm just doing this for fun, really, since i have the parts.
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Re: hemi & 6bbl vapor separator
[Re: 68jim]
#1769006
03/04/15 03:44 PM
03/04/15 03:44 PM
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Joined: Jul 2006
Posts: 4,179 California
mickm
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Quote:
I put a pressure gauge on mine and watched it drop about 2-2.5 psi after I had clamped down on the return line then open it back up again. The Carters carbs, I've always heard, are a bit sensitive to pressure. After some research here on some older Moparts threads I found that the trick was to restrict the return line as even the factory .060" was a bit fat. Recommended was closer to .030". I soldered the return line tip closed then drilled it to .032" because that was the closest drill bit I had at the time. My pressure drop is now around .5 PSI. Even with the smaller hole it still passes plenty of gas. I rigged up some clear tubing for several weeks but rarely saw any bubbles.
good to know. i will set mine around .030 and go from there.
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