RE: {Chrysler 300} AfB carb on 300B

I hope this helps. In 1957, Carter issued a bulletin outlining improvements to the 57 300 WCFBs. One of the improvements was to drill holes in the air horn, so the holes are supposed to be there. Maybe there was a similar situation with the 56 WCFBs. If nothing else, it would explain why some 56 carbs have holes, some don’t….some got updated, some didn’t.

By the way, my copy of the Carter update bulletin is a little hard to read, so I copied a page from Wayne Graefens 1957 300C Handbook, which is pretty much a word-for-word from the Carter bulletin. The Carter bulletin also shows different numbers for early and late 300B carbs.

Henry Mitchell

300C

From: chrysler-300-club-international@xxxxxxxxxxxxxxxx <chrysler-300-club-international@xxxxxxxxxxxxxxxx> On Behalf Of dplotkin
Sent: Wednesday, August 09, 2023 6:44 AM
To: 'Chrysler 300 Club International' <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Subject: {Chrysler 300} AfB carb on 300B

Trying to help a friend with the two afbs on his 300b. He's asking what the hole on the air horn is in this picture is for. He says the second hole on the second car doesn't suck here but this one does. It's above the throttle plate so I don't understand how it causes a vacuum leak but he says he's got one. Any ideas?

Danny Plotkin

Sent from my Verizon, Samsung Galaxy smartphone

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