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Holley G float level
Posted: Wed Jul 28, 2021 12:29 am
by Steve Jelf
I can't find my copy of the Carburetor book, so I need somebody to confirm whether I remember correctly. The puddle should be just high enough for the little tube to stick into it. Is that right? How high is too high?
Re: Holley G float level
Posted: Wed Jul 28, 2021 2:15 am
by KBurket
I was just looking at my book. Hope you can see the attached photos of Holly G float adj pages:
Re: Holley G float level
Posted: Wed Jul 28, 2021 9:13 am
by Scott_Conger
To high is when it drains out the overflow tube hidden underneath the jet. The puddle should just cover the top of the lower portion of the jet and at that setting the idle tube should be just covered with fuel. The old floats were set about 1/2" from the machined flange, but the new material is so buoyant that this setting may need to be modified.
Re: Holley G float level
Posted: Thu Aug 05, 2021 5:14 pm
by jpcouture
There is a discussion of the Holley G float level in the Model T Service Manual (sorry don't have page number). It includes information about a stick with a 1/16" nub (high) on one end, and 1/8" on the other end (low). You rest it on the edge of the cup (as shown above) and use it to measure the gas level below the edge, it should be between 1/16 and 1/8. I made one and found it very useful. This link
Starting - Holley NH vs Holley G also contains a drawing of the stick.
Stan Howe left many Holley G morsels in this forum, in one post he recommended shaving down new floats to a similar size as the old cork ones. I did that with my current float and found it much easier to get a level float with the correct gas level. I have not seen any apparent issues due to the float being smaller. It's worth a search if you haven't completed your rebuild.
Good luck!