Think about it. Most of the big factories in Detroit have hard core racing programs. Imagine what would happen if one of those factories applied all that modern technology to something like a Midget engine. In a move that caught most of the industry by surprise, Chevy unveiled its all-new Midget racing engine at Indianapolis Motor Speedway recently. The new engine will be available to all USAC competitors through independent engine builders. As this engine is brand new, the demand will initially outstrip supply until they become more available to the industry.
Mopar Performance A-4 Aluminum Midget Race Engine Blocks P5007466
Little But Fierce: The Storied History of Midget Cars - The Engine Block
The Offenhauser Racing Engine , or Offy , is a racing engine design that dominated American open wheel racing for more than 50 years and is still popular among vintage sprint and midget car racers. Variations of this design would be used in midgets and sprints into the s,  with a choice of carburetion or Hilborn fuel injection. They and former Miller employee, draftsman Leo Goossen , further developed the Miller engines into the Offenhauser engines. Then in the name and engine designs were sold to Louis Meyer and Dale Drake. Meyer was bought out by Drake, his wife Eve and their son John in From then until Drake's son John sold the shop to Stewart Van Dyne, the Drake family designed and refined the engine until its final race days. It was under Meyer and Drake that the engine dominated the Indy and midget racing in the United States.
USAC Midget Engines – Chevy’s New Midget Engine
Can a sealed Midget engine compete with an open engine? Should it? The crew at Esslinger Engineering thinks so.
While many series have adopted rules that tightly define virtually every component and dimension in a racing engine, the USAC National Midget Series offers engine designers the freedom to innovate. The innovative design of the new Chevy Midget racing engine is the product of imaginative thinking and advanced technology. The USAC Midget rulebook embraces a wide range of engines that includes four- and six-cylinder powerplants, two-valve and four-valve cylinder heads, and overhead-valve, single overhead cam, and dual overhead cam valvetrain designs. However, the Chevy Midget racing engine puts a new twist on a familiar theme.