I want to disconnect the coolant line from my intake manifold to diagnose a coolant disappearance problem. In a high-humidity environment with temps around 25-32C, how bad will the carb icing be?
I want to disconnect the coolant line from my intake manifold to diagnose a coolant disappearance problem. In a high-humidity environment with temps around 25-32C, how bad will the carb icing be?
It shouldn't be a problem at all at those temps. I've run carbs in close to freezing weather without any intake heat (coolant or exhaust crossover) and didn't have any issues.
Depends on the carb really. I had a single barrel on a 61 IH pickup slant 4 and it didn't like it in those conditions. Deleted it on the 240Z and it didn't matter, twin SU's.
I would keep an exhaust heat shield with a tube that draws in heated air if you have one.
25 to 30 centigrade is about 80 degrees.. I do not see it icing
If you can manage to create ice at that temp, you will be able to list that as one of your greatest accomplishments. I've run stuff with aluminum intakes and Holley carbs with open element air filters, and I never had a significant problem even at -10C.
-25 with snow falling, hooboy you can build ice. Pull out of the wind, shut the engine off and let the heat soak up to the carb, and then hit the next 30 mile portion of the trip.
Manifold heat doesn't help with carburetor icing at all. That's done by the hot air into into the carburetor.
Manifold heating helps keep the gasoline droplets suspended.
OK thanks all. Guess it'll be safe to try for a couple days.
PS, on the few vehicles I've had that were prone to carburetor icing (and I've no idea why those cars were prone to it), it would happen at temperatures just above freezing, with lots of humidity in the air from melting snow.
My old Datsun 510 was my champ at it. It iced superbly. Drove me nuts until I figured out what it was doing.
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