Cadillac Engine Development
He was recruited in 1926 by Cadillac general manager Lawrence P. Fisher (October 19, 1888 in Norwalk, Ohio – September 3, 1961 in Detroit, Michigan) to work at the Cadillac Division of General Motors Corporation (GM). Nacker became head of engine development. He designed a 45 degree Overhead valve V-8 with an aluminum crankcase, five main bearings, counterweighted crankshaft with a front vibration damper and timing chain driving the generator. Cylinder blocks included cast nickel-iron liners extending into the crankcase with cast iron heads. This was the engine for Cadillac Division's new 1927 LaSalle companion model.
Nacker was lead development engineer of the Cadillac V-16 engine project. This was probably the first car engine to be styled for aesthetics as well as function. Finned aluminum valve covers were used and wiring and piping were hidden under covers and panels and enamel was used on some engine surfaces. Nacker also developed Cadillac's V-12 that shared tooling and many components with the V-16.
Nacker also was the leader of the 1936 monobloc Cadillac V-8 engine development with John E "Jack" Gordon also in the later stages. This new V-8 was so smooth and powerful it rendered the V-12 obsolete. Therefore the V-12 was dropped from production after the 1937 model year.
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