Re: [Amc-list] Water line in six cyl. intake

[Frank Swygert <farna@xxxxxxx>]

Date: Tue, 06 Jan 2009 17:26:37 -0800 I checked the 66 TSM. According to 
it the 199 has a water heated intake. I checked through the years and 
this was so on all 199s except for 1970, which didn't have a water 
heating tube. Note also that the 232 came only with the WCD 2V carb in 
66. The WCD didn't use a water heated intake on the 196 either. None of 
the 232s used a water heated intake. The reason for the water heated 
intake appears to be economy. Apparently AMC engineers took the 
economy-over-power route for the 199. Heating the intake produces better 
economy and cold weather driving, but at the loss of a little power due 
to a less dense intake charge. So the 2V was the opposite -- 
power-over-economy. Not that the slightly cooler intake helped power a 
whole lot, maybe 2-3 hp? The heat riser in the exhaust manifold 
("flapper" between manifolds) was thermostatically controlled, so some 
heat would be blocked as the engine warmed up, whereas the water heated 
intake should maintain a more or less constant temp along with the 
engine. Directly from the TSM: "The intake manifold on the 199 Cubic 
Inch Displacement Engine incorporates an internal water heater tube to 
provide quick uniform warming of the fuel-air mixture, especially during 
cold weather operation to improve economy." ----------- From: Tom 
Jennings <tomj@xxxxxxx> Subject: Re: [Amc-list] Water line in six cyl. 
intake (was: Engine for sale) Frank Swygert wrote:

> > all the Holley 1909 1V carb 195.6 engines got the water line. The
> > Carter WCD 2V carb didn't have it, and I don't think the other 1V
> > carbs had it either. Don't know about the 199/232 for sure, but I'm
> > pretty sure none of them have a water heated intake, not when the
> > intake and exhaust are bolted together anyway. Could be wrong...
>   

I wonder what the reason/logic is? It's new-at-introduction, so there 
were two manifolds out in the market on nearly identical motors (199 vs. 
232). Perceived market-use? Was some big fleet (telephone companies, 
etc) demanding some sort of cold-weather thing with the 199, so AMC just 
did it across the board? Or is it some sort of left-hand-lugnut silliness?

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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