Recent Posts

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21
Dialing in your rebuilt Quadrajet carburetor / Re: Float Height
« Last post by Cliff Ruggles on February 10, 2026, 03:22:02 AM »
NEVER use a brass float in a Quadrajet.  They do not produce the same fuel level as the far superior nitrophyl floats and since 2005 the brass floats are made in Taiwan and will leak at the soldered joints and sink......
22
Dialing in your rebuilt Quadrajet carburetor / Re: Choke pulloff release time
« Last post by Cliff Ruggles on February 10, 2026, 03:20:40 AM »
A 3.5 second release time is too slow even for your set-up.

Most of the stock pull-offs on those later Olds carbs are pretty slow. 

The release time is also much slower if you are testing it with a vacuum pump vs just compressing/releasing the pull-off.

I sell the good OEM pull-offs and can custom modify them for any application and they come with a straight tube for easy access to the restriction. 

The ones with the bent tube are difficult to modify and I avoid them here, especially the new ones being sold.  The spring in them is too strong and there is no restriction so them open instantly.....
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Quadrajet Carb Talk and Tips / Re: Opinions on these "custom-50m-metering-rods"
« Last post by Cliff Ruggles on February 10, 2026, 03:11:53 AM »
The full taper 50 rods don't have a "step" and provide a broader range of adjustment than standard "M" series rods.

I've sold hundreds of sets of them without a single issue.

I recommend going up .001-.002" larger with the jet size with them.  Mostly because of the full taper and the fact that this new fuel requires about 5-7 percent more of it, all else being equal.....hope this helps some.....
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Dialing in your rebuilt Quadrajet carburetor / Re: Choke pulloff release time
« Last post by Pav8427 on February 09, 2026, 12:38:58 PM »
Thats what I am thinking also. The one I have here at work is running about 3 1/2 now, maybe a bit more, and think that is too slow. I have a few more to check at home before I modify. Who knows, maybe they are a bit quicker and I have a few to play with.
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Dialing in your rebuilt Quadrajet carburetor / Re: Choke pulloff release time
« Last post by novadude on February 09, 2026, 11:51:28 AM »
IMO and experience, I would not go too quick on release time for a stock-ish engine with 2.56 gears.  Otherwise you may need to wind the air door spring too tight to prevent a sag / bog condition.  Maybe 2-3 seconds?
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Quadrajet Carb Talk and Tips / Re: Looking for the thickness of those pressed in Quadrajet secondary orifice plates
« Last post by SUPRCHY on February 09, 2026, 07:20:28 AM »
Not sure if I completely understand the question, but at least one quadrajet supplier sells replacement "Secondary Jet Washers". Could you get the info you need buying a set of those? I actually found a Qjet recently that had one of the jets and its retainer loose in the fuel bowl and was able to replace and re-stake it. But I never thought to measure it.
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Dialing in your rebuilt Quadrajet carburetor / Choke pulloff release time
« Last post by Pav8427 on February 09, 2026, 06:38:56 AM »
Looking ahead for my spring tuning session. I have a stock 79 H/O and will be installing a 17059553 with Cliffs parts. I have a few extra choke pulloffs and want to modify release times.
Not completly stock. IE.
Recurved distributer.
No CAT.
All emmisions bypassed.
No EGR.
2.56 equipped California car.
What would be a good range of release times to have on hand?
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Dialing in your rebuilt Quadrajet carburetor / Re: Float Height
« Last post by 77cruiser on February 07, 2026, 11:10:19 AM »
It could be brass the aftermarket sold them.
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Dialing in your rebuilt Quadrajet carburetor / Re: Float Height
« Last post by TravisUT on February 07, 2026, 07:28:43 AM »
Thank you. The float has a brassy color, so I assumed it was brass; I have no idea! 😁
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Dialing in your rebuilt Quadrajet carburetor / Re: Float Height
« Last post by Kenth on February 07, 2026, 05:19:45 AM »
Rochester never used brass floats for any Quadrajet, with the original type nitrophyl float the setting is 3/8".
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