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There is not "hobby friendly conversion coating" that I know of.  When I was doing them here we used a "recipe" based on how the factory did them.

There is a significant learning curve with coloring castings.  Surface prep, temperature, time, chemicals used, etc. 

Results also vary some even using the exact same "recipe".  This happens because the base materials changed over the years.  Early carbs tend to color darker than later years.  Carburetors that were commercially "remanufactured" can also be difficult to color as many got an "acid bath" as part of the cleaning process.  This removes some of the zinc from the castings and they don't react the same way when coloring them as castings that didn't get that treatment......
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Diagnose a Quadrajet carburetor problem / Re: True? False? Maybe? On. Some choke parts
« Last post by Shiny on October 04, 2022, 07:46:37 PM »
I see the entire carbs zinc plated so it looks like a big gold nugget....talk about UGLY.

Even with that said I've had customers bitch when we colored the castings correctly and combinations of bright zinc, yellow chromate, and green on the parts like the factory did.  They were expecting a big "gold nugget" based on their Internet "research".

So I ended up doing most of them as shown in the pic below unless the customer specifically asked for factory "colors" on the associated parts......FWIW....

If "factory correct", I assume you used a clear chromate conversion instead of the iridescent on zinc-plated parts.  But how would you color the die castings?  Is there a "hobbyist-friendly" conversion coating that ends up looking like the original on the die-castings or have those old chemistries become outlaws?
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Diagnose a Quadrajet carburetor problem / Re: True? False? Maybe? On. Some choke parts
« Last post by Burd on September 30, 2022, 07:32:14 AM »
I think all my linkage is gold.   I’ll have to look at it. 
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Green Teflon coated parts changed thru the years.  Most of the later model carbs will have a green pump arm, and green links on the choke side, plus Teflon coated shafts.....
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Quadrajet Carb Talk and Tips / Re: APT on a 75 q-jet
« Last post by tayto on September 29, 2022, 06:29:36 PM »
make sure to not buy a previously "remanufactured" qjet, they usually have a metal tag under the front airhorn screw....
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Diagnose a Quadrajet carburetor problem / Re: True? False? Maybe? On. Some choke parts
« Last post by Burd on September 29, 2022, 03:59:35 PM »
What parts exactly get the green Cliff?
My carb has been rebuilt twice since 1978.   Some might not be correct.
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Diagnose a Quadrajet carburetor problem / Re: True? False? Maybe? On. Some choke parts
« Last post by QUADRAJAM on September 29, 2022, 02:44:19 PM »
There is a firearms coating called CERAKOTE that is chemical and abrasion
resistant once cured. Kind of pricey but you could do lots of carb parts with it.
I looked at their color selection and several of the greens are really close.
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Going from memory Moss Green from Krylon is pretty close.

Carry a green part with you to the store and match up the color on the paint lid, that's what I did.....
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Diagnose a Quadrajet carburetor problem / Re: Surge at steady speeds
« Last post by Cliff Ruggles on September 29, 2022, 04:59:45 AM »
That "recipe" is a DISASTER for that carburetor part number.

Call me at the shop when you get a moment and I'll put together a custom high performance rebuild kit with tuning parts to nail that thing down for what you are doing. 

I'm here 7am-4pm M-F EST.

740-397-2921

It's NEVER going to work well like you have it set up now.....tks.....Cliff
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Quadrajet Carb Talk and Tips / Re: APT on a 75 q-jet
« Last post by Cliff Ruggles on September 29, 2022, 04:56:50 AM »
It's about the same here, folks selling factory Q-jets like to attach the "Corvette" name to them.  I guess this instantly doubles their value.......
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