Carburetor madness by Drew

[Gregwill16]

Drew how about a C3AE-B early 427 Q code? I plan one of these days to get your info and send you it along with a set of BJ/BK's.

[Drew Pojedinec]

I’ll msg you.

[Drew Pojedinec]

CU CV carbs....

IMG_1016 by Drew Pojedinec, on Flickr

IMG_1496 by Drew Pojedinec, on Flickr

IMG_1497 by Drew Pojedinec, on Flickr

[Heo]

Beautiful

[Drew Pojedinec]

The whitish/grey specs you see all over the surface in the first picture is honestly the worst thing.
It's water based corrosion.

I had to re clean many parts multiple times and polish for hours to get it out.  Kinda like rust, it's a soft corrosion, so moisture and debris can get inside of it.  Chromate will NOT take to that.  You need to clean inside the corrosion to get a good surface.  With junk carbs, no biggie, just buff or sand the corrosion off.  With valuable originals like this, that isn't an option.
They came out pretty well tho.  All original parts, nothing substituted.

[gt350hr]

   Drew ,
        Try white vinegar on the white corroded stuff. Same guy that told me about alodyne told mer about white vinegar removing that crap.
     Randy

[Drew Pojedinec]

I'll try it for sure.  Acids like that work on the white fluff, just melts it.  I dunno about the surface stuff, I think I'll still see it wicking in.  Either way, vinegar is cheap.

[Heo]

Yes they look like they have been stored in a
very damp place
Fortunately where i live the air is very dry so
we don't have corrosion like that unless you store
things in a potato cellar or something like that

[Barry_R]

That white fuzz can be a real disaster in newer stuff running with the alcohol in current fuels.  The alcohol absorbs/holds water and if it sits in an old bowl with marginal plating it grows tons of that fuzz.  I've seen it render a metering block irreparable.

[Drew Pojedinec]

I had a heck of a time recently with Mr Charlie's AM carb just because of this.

It had the corrosion eat into the secondary side of the metering block.  I was able to flycut that surface.  The primary metering block kept leaking into the intake tho.  I couldn't find it.... plugged the power valve, nope, still leaked, saw it leaking out of the transfer slot just on the driverside.

After many hours, finally figured it out.... the casting between the accelerator pump passage in the metering block was leaking into the idle well right there between the passage and transition slot hole in the block.  This was slowly draining the bowl as the engine sat.
No way to fix it, so I replaced the metering block.  Hate to see it on a classic.  Thankfully the CU/CV were just external corrosion, the innerds looked fine, and hopefully I'll test them out tomorrow, they've got an appointment with a Lightweight

[Stangman]

Very nice Drew

[RJP]

I run across the white/gray sh*t often on marine carbs, both externally and internally especially carbs that have used dock gas, usually has a lot of water in it. I've had good results using "CLR", the stuff that just about every supermarket carries. Soak in 100% for as long as the bubbles and foaming continues.

[Drew Pojedinec]

52389985_417971008941636_5504906862283194368_n by Drew Pojedinec, on Flickr

[cjshaker]

That's a lot of time and effort sitting there. And a pretty cool picture.

[Drew Pojedinec]

That is why I took the picture, just looked right

The coolest part is hearing about all the cars they are going on.