AVS Carb Restoration: Plating Reference

Hello!

Just about to do some yellow plating and am trying to figure out what parts on the AVS carb and choke are suppose to be plated yellow. Have not been able to find good references but am sure that the links and hooks at the ends of the throttle shafts should be yellow. What I am not sure about are the:
top screws, idle screws, choke spring and hardware that goes in the intake manifold, ect.
This is for a 1969 Road Runner with a 4-speed. Sure appreciate your help.

Carl

http://harmsauto.com/

Just finished this one,Scott may have one with a little better resolution.

Thats a good picture! Did you cad plate the link that connects the two air doors? Also, is the hinge screw for the fuel plunger at the front left corner of the cars suppose to be cad or zinc?

THanks Carl

Bill, Do you add bronze throttle shaft bushings on your carbs? Mine are loose and I'd like to buy a kit with the bushings and reamer if you have a source. Also need to buy screws for the throttle blades as I know that these will break off.

Thanks,
Carl

The link on this one was black phosphate,accelerator pump arm screw was clear zinc.Only ever had one that I felt really needed bushed,almost all I have done had some play,even some that had very little use.

How do they get the body somewhat shinny (tumbler) ? the one on my RR looks like it's porous after I spray it off in a few drives it turns yellowish around the top and driver side.

Here are a couple shots of one I did for reference. In speaking on plating colors/types to keep things simple I just call them "silver" or "gold" because some of todays plating colors are accomplished using different methods than the factory used (cadmium, zinc, etc.).

In my experience there are a number of variables when it comes to plating correctness, sometimes individual parts being silver or gold even on the same part# and year carb.

So, what I do is to record the original plating color details of each original (virgin/never rebuilt) carb I see so that I have a good reference base. Most carbs I receive have been rebuilt and the plating is either gone or incorrect which makes these records handy.

When it comes to the body finish there are several methods I use. It really depends on how bad the casting is when received, it's not a boiler plate "one size fits all" process. Sometimes a good cleaner is sufficient while in other cases soda blasting, vibratory finishing, or some other proprietary method is used, especially for really dirty or corroded examples.

The factory cast them in an aluminum alloy which was not coated or finished with anything, however the metal that hit the mold and froze off first was generally smoother and more dense at the surface giving somewhat of a barrier quality.

When a carb is media blasted it opens up the surface pores and if left that way they can absorb stains quite easily/quickly. So, if blasting is used it's a good idea to used a secondary finishing method to peen back the surface which gives it a more correct appearing factory like sheen and closes up much of the porosity which offers a better barrier to stains etc.

I agree with Bill, most carbs don't "need" to have the throttle shafts re-bushed but I add new bushings to them all anyway simply because it's not a difficult process once they are apart and it eliminates any future questions about them being suspect, etc.

Not to hijack the thread but Scott, can you modify these carbs at all, say for a factory appearing stock tire build or something along those lines?

Give me a call and we can go over some options on that