Carb ice

[bhearts]

Just learned the term carb ice this weekend. Carby air planes on humid days freeze the moisture out of the air because of the fuel boiling in the vacuum, causing the fuel to drop in temperature. Also relatively common on air cooled vw's back in the day. Pre turbo injection would be a way to mimic it, if one could make a proper venturi to create some huge vacuum in that high flow zone.

[rmoltis]

Carb engines are great for turbo'ing.
The fuel in the air cools the charge

So a blow through carb would be ideal because it would constantly be cooling the charge.

I was just reading about it the past few days.

[bravekozak]

Icing on the butterflies usually occurs when the air temp is a few degrees above zero and there is water vapor in the air. If there is no heat plate under the carb, The engine will run rough until it heats up just enough to melt the ice off the butterflies.
Racers used to install heat crossover block off gaskets to cool the intake charge, in addition to coiled fuel lines in dry ice buckets.