I had a stock 1956 4V intake on the +060 over 312 dyno mule so I could sort out some Holley Teapot, Carter WCFB, and Rochester 4V carbs in preparation for the upcoming dual quad intake test.  The peak power numbers were so dismal I had to take a second look at the carbs to insure that the secondaries were opening up; the carbs were working just fine.  Final conclusion: the 1956 ECZ-A intake is obviously very restricted compared to the stock 1957 ECZ-B intake.  It’s no wonder that so many of those ’55 and ’56 Fords that had dual quads installed back in their day had a significant increase in performance.

Here are the peak HP numbers for three different intakes used on the dyno mule with a set of mildly ported 113 heads.  All these values are with the same carb just to keep all the intake comparisons on a level playing field.

– 240HP at 5100 rpm - ECZ-A Teapot, stock unported

– 276HP at 5200 rpm - ECZ-B Large flange, stock unported

– 311HP at 6000 rpm - Out of the box Mummert aluminum, stock unported

While the Teapot intakes are obviously good daily driver manfolds, the step up in performance in just changing to the ECZ-B intake is more than impressive.  Ford engineers were on top of their game in ’57.

Lorena, Texas (South of Waco)