Sweating carb base?

B

B-nut

Senior Member
Running a 1935 ford with a model 48 carb. After a good run the black base of the carb is dripping with water. A 1936 that I also drive has a model 97 and remains dry. What is going on?
 
Warm day, high humidity, run engine for a period of time and the expanding fuel/air mixture will pull heat out of the carb. base the same way an airconditioner works. If the ambient air temp. is lower the carb. can ice inside the throats. The heat riser passage, in the intake , could be not working if this is happening often.
 
Perfectly normal under the right conditions. Under the right conditions a layer of ice could build up inside the carb.as well as the outside. This is why aircraft engines are provided with a carb. heater, to melt out any ice build up that may cause the engine to quit. :):D
 
B-nut said:
Running a 1935 ford with a model 48 carb. After a good run the black base of the carb is dripping with water. A 1936 that I also drive has a model 97 and remains dry. What is going on?
Click to expand...
Some 35-36 intakes have a 3/8" to 1/2" hole between the rear studs under the carb base which leads to the cross over passage chamber. Maybe 1 manifold has the hole and the other one dosen't.That provides heat to the carb base.Or the passages in the block could have been blocked off with pennies by previous owner. ken ct.:)
 
The other day I took the Roadster out for a run after adjusting the steering. Humidity was 100% with 90+ temperature. While turning around in a parking lot, the engine stalled. I took the air cleaner off to see if the accelerator pump squirted when I hit the linkage and when I looked inside, the inside of both carburetors was covered in water condensation. First time I'd ever seen anything like that. I guess having a blower under the carbs didn't help, either...
 
A model T will ice up when using the aluminum high flow intake.
Some marvel mystery oil in the gas helps prevent this as well...
Mainly happens when cruising at speed evening hours etc........will get iced up enought to make engine spit.
 
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