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On 14 Aug 2003 at 8:32, Scott Taylor wrote: > From the VW workshop manual: > 28 mpg US for the 1500 Notch and Square and 28.5 for the 1500 Ghia > 30 mpg US for the 1500S Notch and Square and 29 mpg for the 1500S Ghia > > so, slightly better fuel economy along with a horsepower increase of > over 20% Interesting that there is very little difference with the T34. These aren't quite apples to apples. What happens if we compare single and dual carb engines with the same compression ratios? I'm sure there were low compression dual carb engines. Were there also high compression single carb engines? I always get confused here because the VW production survey refers to only 2 compressions: standard and low. Was the 1500S a standard compression engine, or was it "none of the above." > I think there were several reasons for still offering the single carb > version: > > - lower production cost Seems to me that this advantage is minimal because of the lack of economies of scale. > - ability to run on low octane fuel Which is cheaper, so the cost per mile may come out the same, or even better. > - simplicity; less maintenance required and no special training > required for carburetor adjustment This just might be the real "smoking gun" here. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org