Hiatus over!
#DavesCarIDService returns with a happy birthday salute to the mightiest mill of all, the Chrysler 426 Hemi, which was fired up for the first time in a secret Chrysler Corp dyno room December 6, 1963.
Initially a racing-only project, it debuted at the 1964 Daytona 500 where it simply blew away the field, capturing the top 4 places. It met all NASCAR engine configuration rules of the time - basically 8 cylinders and fewer than 7 liters, or 427 cubic inches, total displacement. Incidentally that's why you see so many engines in the 421-427 range. But there was widespread griping among competitors that it wasn't really a "stock car" motor, one that you could order at a local dealership.
To address the unfairness gripes, NASCAR implemented their homologation rule: in order to qualify as a "stock" motor, an engine had to be in at least 500 production cars. Thus, in 1966, Chrysler unleashed the street Hemi. A got-danged genuine Hemi-packed car you could order at the local dealership if you had the qualifying credit and relatively unlimited gas and car insurance budget. And you would be almost guaranteed to be King of the Hill in your local street racing scene.
Oddly enough no Chrysler 426 Hemis ever appeared in a Chrysler; they were only in Dodges and Plymouths, in very limited numbers, from 1966-71. Including some of the wackiest muscle cars ever street-licensed, like the 1970 Plymouth Superbird (2).
In the Muscle Car Era, the 426 Hemi was the apex predator. Among gearheads, the small block Chevy was the "Mouse," the big block Chevy the "Rat," but the 426 Hemi was the "Elephant." It dominated pretty much every form of racing in which it competed, particularly drag racing. So much so that even today every NHRA Top Fuel Dragster and Funny Car is powered by an engine based on the 426 Hemi, tricked out to 10,000-12,000 horsepower. Those are just mathematical estimates because there isn't a dynomometer capable of measuring it.
So on behalf of motorheads everywhere, happy birthday you crazy pachyderm.