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 Post subject: Carburator whistling?
PostPosted: Wed Jun 25, 2008 7:04 pm 
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TBI Slant 6

Joined: Wed Feb 27, 2008 7:28 pm
Posts: 118
Location: California
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i have carb 64-3114 and i just installed it on my dart and when i start it up...it starts whistling..any ideas as to what tis is? maybe a vacuum leak?

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71 dodge dart custom

1988 Honda Civic ((Because racecar))

2005 VW Jetta

1963 AMC Rambler American 440


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 Post subject:
PostPosted: Wed Jun 25, 2008 7:19 pm 
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Joined: Thu Oct 31, 2002 5:39 pm
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Location: North America
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Probably. "Remanufactured" carburetors are notoriously problematic.

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 Post subject:
PostPosted: Fri Jun 27, 2008 12:10 am 
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TBI Slant 6

Joined: Wed Feb 27, 2008 7:28 pm
Posts: 118
Location: California
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Do people even test these cargbs before they start to sell them?

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71 dodge dart custom

1988 Honda Civic ((Because racecar))

2005 VW Jetta

1963 AMC Rambler American 440


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 Post subject:
PostPosted: Fri Jun 27, 2008 4:31 am 
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SL6 Racer & Moderator
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Joined: Sat Oct 19, 2002 12:06 pm
Posts: 8977
Location: Silver Springs, Fl.
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Quote:
Do people even test these cargbs before they start to sell them?
If they did that, they would have such a high reject rate, there would be nothing to sell.

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65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
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 Post subject:
PostPosted: Fri Jun 27, 2008 5:45 am 
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TBI Slant 6
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Joined: Fri Jun 29, 2007 2:37 pm
Posts: 105
Location: Rio Rancho, NM
Car Model:
I'm assuming that the carb number is for a 1920 type Holley carb. Has the big fuel bowl towards the front.

The whistling is a vacuum leak. Look at the fuel bowl in the front, where it mates to the carb, just to the right, on the top is a cap about 3/4 to an 1" in diametre that is held on with three screws. My guess would be that most likely this is where your whistling is from. Sometimes the screws are just not tight, but sometimes the cap is warped.

Check that and see if I get the prize for guessing right where it is. :lol:

If it is, then I will admit I cheated a bit. Had the same whistling sound when I got this car. Found the cap was warped. Luckily was able to find another from another member of the Mopar community and fixed the issue.

Cheers

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From Mopars to classic Minis and back to Mopars in 19 years flat!

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 Post subject:
PostPosted: Fri Jun 27, 2008 7:36 am 
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Supercharged
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Joined: Mon Jan 15, 2007 5:05 pm
Posts: 3767
Location: Black Diamond, WA
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That's pretty common having those three screws loose. You can buy some star washers or locks washers to help the bolts from loosening over time. Mine had none.....just the screws.....my cap was ok, perfectly flat, just loose.
It gets full vacuum 18" to 25" and operates the power valve.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG


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 Post subject:
PostPosted: Fri Jun 27, 2008 8:56 am 
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TBI Slant 6

Joined: Sat Feb 04, 2006 11:13 pm
Posts: 166
Location: Chesapeake Beach, Md.
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Could it be worn throttle plate hinge points?

Do you recognize the tune? .......... Sorry, it's Friday, it's hot in DC, my economy is in the toilet, and I wanna go home.

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 Post subject:
PostPosted: Fri Jun 27, 2008 9:46 am 
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Guru
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Joined: Mon Oct 14, 2002 4:32 pm
Posts: 4880
Location: Working in Silicon Valley, USA
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Quote:

Do you recognize the tune? .......... Sorry, it's Friday, it's hot in DC, the economy is in the toilet, and I wanna go home.
Sounds like "whistle while you work" to me... :lol: :roll:
(I could not resist)
DD


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 Post subject:
PostPosted: Fri Jun 27, 2008 1:46 pm 
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TBI Slant 6

Joined: Wed Feb 27, 2008 7:28 pm
Posts: 118
Location: California
Car Model:
It seems to whistle whenever im at idle, but when i start to acellerate the whistling will disappear, its very weird for me.

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71 dodge dart custom

1988 Honda Civic ((Because racecar))

2005 VW Jetta

1963 AMC Rambler American 440


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 Post subject:
PostPosted: Fri Jun 27, 2008 2:21 pm 
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Turbo EFI
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Joined: Fri Jul 16, 2004 5:22 am
Posts: 1134
Location: Carrollton, TX
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Maybe it doesn't know the words... :lol:

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 Post subject:
PostPosted: Fri Jun 27, 2008 2:49 pm 
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Supercharged
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Joined: Mon Jan 15, 2007 5:05 pm
Posts: 3767
Location: Black Diamond, WA
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Quote:
It seems to whistle whenever im at idle, but when i start to acellerate the whistling will disappear, its very weird for me.
That's is not weird at all, when you open the throttle plate the vacuum drops.
Hook up a vacuum gage inside and watch what happens. That will also help your driving style too! I wouldn't be with out it.......

Tighten up the nuts, (holding the carb down) and bolts (holding the accelertor pump) with lock washers or star washers so they don't loosen up. :D

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG


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 Post subject:
PostPosted: Sat Jun 28, 2008 2:29 am 
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TBI Slant 6

Joined: Wed Feb 27, 2008 7:28 pm
Posts: 118
Location: California
Car Model:
okay i decided to test the vecuums by pulling off each hose and i noticed that the one controlling the ahh...choke...sorta like a vacuum operated thingy..for the choke..and the pitch of the whistling grew deeper, but when i put my thumb on the nipple the whistling goes back to normal, loose vacuum nipple?

((The vaccuum operated choke helps open the choke i think..))

_________________
71 dodge dart custom

1988 Honda Civic ((Because racecar))

2005 VW Jetta

1963 AMC Rambler American 440


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 Post subject:
PostPosted: Sat Jun 28, 2008 10:55 am 
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1 BBL (New)
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Joined: Sat Jun 28, 2008 10:47 am
Posts: 5
Location: Canton, GA
Car Model:
Hi all... first time posting, so be gentle, eh?

Haven't had a /6 in over 20 years, but had a yard full of the critters back-in-the-day. One, a '66 Dart 270, developed the annoying carb whistle, the source of which was damn elusive for several days.

Eventually found that where the top cover (bowl/air horn cover) bolts to the carb body was the culprit - the top had warped slightly and sucked the gasket partially into the throat allowing a tiny gap between the top and bottom. Air rushing into the carb via this gap caused the whistle.

Lapping the mating surfaces and using 'copper coat' on the gasket prior to assembly rectified the musical inclinations of the carb.

Been reading this forum a long time. God, the memories it brings up.
Maybe some day...


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 Post subject:
PostPosted: Sat Jun 28, 2008 11:17 am 
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Board Sponsor & Contributor

Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24799
Location: North America
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Welcome on the board, MilwaukeeTech. What you're describing sounds like you had a Carter BBS carburetor; the top-to-middle casting junction on these and the BBDs can indeed warp over the decades. A good solution is to use a stack of two (or even three) of the correct gasket at this junction.

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 Post subject:
PostPosted: Sat Jun 28, 2008 11:37 am 
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1 BBL (New)
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Joined: Sat Jun 28, 2008 10:47 am
Posts: 5
Location: Canton, GA
Car Model:
Yes, it was a Carter. I switched back and forth with the Holley more times than I care to remember on those engines... kept suffering from the 'grass is always greener' syndrome, I suppose. That is, until I went with dual sidedraft Webbers on the '64 GT. From that point on, the other side didn't even have any grass.

Now, 25 years later, I've sort-of got my eye on a '64 GT for sale locally. And somewhere I've still got the templates for the manifolds. But I haven't seen headers like the ones I had in ages.


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