Recent content by modela-carb

If Uncle Max is stil out there and doing carbs, he's the guy to go to for 97 help

Ford used 2 carburetor manufacturers, Zenith and Holley. The early (1927) Zeniths were blank on the top & marked "Zenith" on the base. The 1928 Zeniths were marked "Z" on the top and Zenith on the bottom. Thereafter all Zeniths were marked Z on the top & Zenith-1 on the bottom. The early...

The earlier carbs had a carburetor adjusting needle seat that screws into the bottom of the adjusting needle housing (with a gasket). It looks like the comp jet but is a little larger. The adjusting needle seats into this to adjust the GAV. In Jan 1930, this piece was removed and an integral...

Eric, I assume you're talking about the Model B... yes, I can. Send me an email & we can discuss what you have in mind.

Testing new picture

modela-carb@live.com

Rebuilt Zenith & Holley Model A Carbs for all months/years 1928-1931. Jets flow tested & correct, floats & valves tested, every part inspected and refurbished or replaced as necessary. All work guaranteed to your satisfaction. Set for initial start-up, mounting & adjusting instructions included...

The smaller comp jet goes in the fuel bowl. The one that looks like a comp jet but is larger is a GAV adjustment needle seat. Remove the GAV adjustment needle housing and shine a light down. The earlier carbs are threaded for the needle seat & you can put a gasket on it & screw it in. The later...

The jets are supposed to be the same height and normally match with only one gasket beneath. It is possible one or the other jets may be non-stock Model A. There are a lot of similar jets out there made for other applications that end on the the Model A carb. Other possibility...is the cap jet...

Fredski All of the Model A carbs have rounded bowls and, if marked Zenith 1 or Zenith 2 will have the marking running horizontally. The Model B's (begun in 1932) are not Zenith 2's. the "Zenith" will run vertically. Sounds like you have a stock Model A carb

Steve, The Model B carbs have Zenith running vertical rather than sideways. The Model B is visually different than the Model A..square bowl rather than rounded and a "chunkier" appearance, but it will work fine on the A if in good condition or rebuilt

There's no difference between the Z1 (Zenith) & the Z2 (Holley) except the marking. Ford used both Holley & Zenith to supply his carbs and had them marked differently so they knew who built it. Jon's right about rebuild qualities. Short cuts lead to short trips.

Brent suggested I follow up with you guys. The Model A community is the best. I've always enjoyed the cars, but it's the people that have made the hobby special. Even though I no longer own an A, I've continued to be involved just because you folks give back so much more than you take. I have...

Oorah!!

Could be an air leak. With the gav open that far more gas than normal is allowed in the carb. If it's running as good as you say, it indicates the excess fuel is being balanced by excess air...which shouldn't be there. Fordfixer is right, the car should perform well on 1/4 setting. Check for...