Need carburetor and advice

[Deleted User]

I am about to bolt my '41 six (175) back together and I am seriously thinking about installing the aluminum 2-barrel intake manifold that I have in place of the stock cast steel with one barrel carb.



I've looked at Carter WDO, WDG and WCD's online but I haven't found a good source for one and I'm not sure what model / specs I should get. I'm not concerned about being period correct, just that it works better than the stock one barrel (WA-1).



Anyone know of a source for these carbs or another type carb to use?



What kind of CFM's should I run on a stock 175? A late model carb would be OK with me...



BTW, the manifold is a "4 bolt" carb type (don't know the butterfly valve bore size of the top of my head)...



Worse case scenario is that I could use a 3 bolt by drilling and tapping new mounting holes.



Craig

terraplane8

I am also pondering the single throat/twin throat options for my '36 Terraplane and am thinking that the standard carb is probably fine for the overall limitations of the engine design.



Looking at the 1936 Reference sheets that I have handy, it is interesting to note that on the optional 7.0:1 compression ratio the Hudson Eights developed 124hp on the standard single throat Carter W1 1 1/4" carb compared to the Terraplane and Hudsons which developed 100hp on the same Carter W1 size carb. That indicates to me the single throat carb isn't the limiting factor. The one thing I have to confirm is whether there is a difference in carb size required for a six versus an eight cylinder engine given the latter for example has more smaller cylinders (10% less volume each than a six cylinder cylinder) which would presumably have a lower peak air flow demand per intake stroke compared to the six with fewer bigger cylinders.



I would think that for the smaller size of the 175 cu" engine a good single throat carb off say a Hudson Jet would be the go. Later other brands OHV straight sixes of up to 250 cu" capacity seemed to develop plenty of horsepower compared to a standard Hudson 175 cu" engine using just a single throat carb. It may be with a twin-throat the airflow velocity will be too slow with poor slow speed metering and engine response as a result. A more modern vacuum secondary carb may be better.