Ok, so I don't have an experimental. I do, however, have a carb
on the Continental E-225 in my Bonanza. Its a Bendix PS5-C.

There is no true carb heat on the early Bonanzas. There maybe
something labeled 'carb heat', but what it really is is
alternate air. It allows air into to the carb from inside the
cowling, bypassing the air filter. The cowling air will be
warmer than ambient, but probably not nearly like it would be
if there was a heater muff like there is on other planes.

I have been told that the PS-5C is immune to carb icing which
is why the Bonanza is set up the way it is. I'm not sure I
can buy. Yes, the PS5-C has no float, but it still has
jets and a butterfly valve.

What I can say is that in 14 years of flying this plane, I've
never experienced carb icing with it. And a a fair amount
of that time was in very wet IFR conditions.

I don't know what to think.
--
Frank Stutzman
Bonanza N494B "Hula Girl"
Hood River, OR (soon to be Boise, ID)