Author Topic: True? False? Maybe? On. Some choke parts  (Read 350 times)

Offline Mr.Pontiac

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True? False? Maybe? On. Some choke parts
« on: August 15, 2022, 06:58:23 AM »
I was told over the weekend that all the green colored parts on a q-jet are actually a Teflon coating, I thought it was just a added color plating for looks.Anybody redoing this if it’s true?

Offline Cliff Ruggles

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Re: True? False? Maybe? On. Some choke parts
« Reply #1 on: September 21, 2022, 04:42:54 AM »
It's supposed to be a Teflon coating, but green paint will work fine if you are trying to duplicate the original color and the parts needing it. 

Problem is that there are a LOT of different "green" paints out there, so you may have to try a few to find the one that is closest to the original color....

Offline Burd

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Re: True? False? Maybe? On. Some choke parts
« Reply #2 on: September 21, 2022, 07:31:06 AM »
I see the stuff all gold plated all the time at the swaps/shows.  It looks bad.  And people think it was factory. 
1978 Y88

Offline Cliff Ruggles

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Re: True? False? Maybe? On. Some choke parts
« Reply #3 on: September 23, 2022, 04:35:05 AM »
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....

Offline 77cruiser

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Re: True? False? Maybe? On. Some choke parts
« Reply #4 on: September 23, 2022, 07:23:04 AM »
Holley colors. :D
Jim

Offline Burd

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Re: True? False? Maybe? On. Some choke parts
« Reply #5 on: September 25, 2022, 09:55:42 AM »
What is a good green paint to use to replicate the factory green?
1978 Y88

Offline Cliff Ruggles

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Re: True? False? Maybe? On. Some choke parts
« Reply #6 on: September 29, 2022, 05:01:00 AM »
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.....

Offline QUADRAJAM

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Re: True? False? Maybe? On. Some choke parts
« Reply #7 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.

Offline Burd

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Re: True? False? Maybe? On. Some choke parts
« Reply #8 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.
1978 Y88

Offline Cliff Ruggles

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Re: True? False? Maybe? On. Some choke parts
« Reply #9 on: September 30, 2022, 02:20:35 AM »
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.....

Offline Burd

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Re: True? False? Maybe? On. Some choke parts
« Reply #10 on: September 30, 2022, 07:32:14 AM »
I think all my linkage is gold.   I’ll have to look at it. 
1978 Y88

Offline Shiny

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Re: True? False? Maybe? On. Some choke parts
« Reply #11 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?

Offline Cliff Ruggles

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Re: True? False? Maybe? On. Some choke parts
« Reply #12 on: Today at 01:49:53 AM »
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......