Why NASCAR Hated Smokey Yunick's Chevy 292 Turbo

NASCAR hated Smokey Yunick's Chevy 292 turbo, and this is the story of why. Smokey Yunick turned a slow Chevy inline-six truck engine into a turbocharged NASCAR threat that challenged the V8 establishment, until the rulebook was rewritten to stop it. In 1973, the fuel crisis hit America and NASCAR suddenly had to look like it cared about efficiency. Smokey saw his chance. He took the humble 292 cubic inch inline-six, a workhorse built for delivery trucks, and added a custom turbo system, an intercooler and a blow-through carburetor. The result was a small, light, torquey engine that reportedly went toe to toe with big-block 427 V8s. Then came the part nobody expected. Instead of banning the engine, NASCAR changed the math on turbo displacement and turned a legal 292 into a paper 496. In this video we break down the build, the numbers, the politics and the legacy of the engine NASCAR never let race. 🔧 What you'll learn Why Smokey Yunick chose the Chevy 292 inline-six How the turbo, intercooler and blow-through carb worked together How its power compared to NASCAR's big-block V8s How the turbo displacement multiplier ended the project Why modern turbo engines prove Smokey was ahead of his time 🏁 Watch more American car history [paste your series playlist link here] 💬 Question for you: would Smokey's turbo 292 have won the Daytona 500 if NASCAR had let it race? Tell me in the comments. 👍 If you enjoy forgotten engines and racing legends, like the video and subscribe to Rare Car Stories. New banned-engine stories every week. #SmokeyYunick #NASCAR #Chevy292