Hi,
I just got a remanufactured Holley 1920 back from the Holley factory. I noticed that there is a small hole in the base of the carb. See photo for location.



Is this normal? My existing carb doesn't have this.

Thanks,

Tom

Yep, many of my 1920s have it. I think it is maybe an air bleed for idle mixture?

Lou

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Home of Slant6-powered fun machines since 1988

I wouldnt worry about, the original 1920 on my 61 Val has it. A few years ago I ordered a remaned 1920 to go on my A-100 to replace the carter that was on it and the first one came in with this hole so I made the parts guy send it back thinking that it was defective and the next one came in without the hole.Since then I have seen them both with and without the hole.Go figure.I assume that it is some kind of air bleed.

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Ive got a slanted attitude and a heavy right foot.