<VV> Single Carburetor - Better formatted

Tony Underwood tony.underwood at cox.net
Tue Apr 23 23:49:30 EDT 2013



I DO agree that there really needs to be some sort of carb heat for a 
center mount carb to work right.  Sitting out there on its own, it's 
going to stay cold, and in cooler weather it WILL ice up in damp 
chilly times.  Trouble is, there's not really any easy way to plumb 
the carb plenum for anything that's likely to bring it real heat 
unless you have one of the plenums that DOES have a chamber for that 
sort of thing (some did) and perhaps you can run pressurized oil 
through it... which requires additional plumbing.  Been there done 
that, not a lot of fun and it still takes a while to get any heat to 
the carb which is constantly trying to cool itself as long as the 
engine is running.  I've seen dew condensing on the runners of a 
warmed-up engine in damp chilly weather.  And, I've seen an AFB (the 
450 cfm variant)with frost on it, idling... rough.

Of late, I'm almost of the opinion that the best way to use a 
4-runner intake is to put TBI on it, with the associated 
electronics.  Carbs work best when  parked on a hot intake 
manifold/log.   That's how they were designed to work, at least most 
of them anyway.

tony..     


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