View attachment 54247 In a few weeks I'm taking some engines to the NCRS Show in San Antonio. Taking the first production 265, an aluminum 283, Z-11 and Mystery Motor.
The Z-11 is for the Colbert car(still working on the body).
I have a white 63 Impala for the MM.
Since we had the MM and Z-11 side by side I thought I would show them.
It's interesting to see the considerable differences of the different designs of 2 completely different 427 Chevrolet engines in 1962/63
One of the first things to notice are the headers and valve covers. Keep in mind both of these were developed at the same time in the same complex, the Z-11 by Zora Arkus Duntov's team and the Mystery Motor by Dick Kieneth. While the Z was a drag race version and the MM was for Daytona Zora did make a couple of single 4bbl Z-11 intakes.
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The Mystery Motor was the first time Chevrolet had used a Holley Carburetor on any engine. Bill Howell the primary engineer on the engine told me he decided to use the carb after running it on the dyno and it made more HP than an AFB.
NASCAR Z-11 Single 4 Intake
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