R Cubed Posted December 31, 2009 Share Posted December 31, 2009 Hi all Merry Christmas. Are there only two types of carb fitted to the 270 CCKW engines, iron and ally, what was the reason for changing to the ally ones during repairs ? Which is the better one of the two..... Quote Link to comment Share on other sites More sharing options...
HWade Posted December 31, 2009 Share Posted December 31, 2009 Hi I have not used the cast steel carb but I have always been led to beleave that the Dicast alloy carbs are a more economical carb to run on truck, giving more MPG.Well thats what I have been told. Howard Happy New Year. Quote Link to comment Share on other sites More sharing options...
Gordon_M Posted December 31, 2009 Share Posted December 31, 2009 I had both for the DUKW, and different air cleaners too. The iron carb had a four bolt top flange and matching air cleaner mount, wheras the alloy carb had a round top and matching clamp type aircleaner mount - both were original equipment. I think I still have the alloy carb somewhere in the parts store if anyone needs it, but no idea of the value. I have a banjo type pillow block too, which was in a box of reconditioned units. Way too heavy to post unless anyone is desperate. Quote Link to comment Share on other sites More sharing options...
shopnut Posted January 1, 2010 Share Posted January 1, 2010 Hi and a Happy New Year According to articals written by Bryce Sunderlin, the alloy carb. was the used on the early trucks, but there was a problem because the air filter would become loose and even fall off, there was even a modification by fitting a support bracket from the cylinder head but they then went to the cast carb., a stronger unit, where the air cleaner bolts to the carb. and overcame that problem but this carb. did not perform as well. So it could be said if you have a alloy carb. fitted this would out perform a truck fitted with a cast carb.?? More information see Army Motors No,54 page 18. Hope this helps Quote Link to comment Share on other sites More sharing options...
R Cubed Posted January 1, 2010 Author Share Posted January 1, 2010 Very interesting Thanks Quote Link to comment Share on other sites More sharing options...
Gordon_M Posted January 1, 2010 Share Posted January 1, 2010 Basically that is why I still have the alloy carb, and maybe even the aircleaner somewhere. It has a much less satisfactory joint with the aircleaner than the cast one with the four bolt flange. Quote Link to comment Share on other sites More sharing options...
R Cubed Posted January 1, 2010 Author Share Posted January 1, 2010 Hi and a Happy New Year According to articles written by Bryce Sunderlin, the alloy carb. was the used on the early trucks, but there was a problem because the air filter would become loose and even fall off, there was even a modification by fitting a support bracket from the cylinder head but they then went to the cast carb., a stronger unit, where the air cleaner bolts to the carb. and overcame that problem but this carb. did not perform as well. So it could be said if you have a alloy carb. fitted this would out perform a truck fitted with a cast carb.?? More information see Army Motors No,54 page 18. Hope this helps Does anybody have the two different carbs on two different trucks and have they compared each other with reference to performance ? Would anyone have a copy of Army Motors No,54 page 18 I could see. Quote Link to comment Share on other sites More sharing options...
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