HOT ROD’s archives are chock-full of brilliant tech reports that truly are timeless. This one, drafted by Jim McFarland for our February 1972 issue, provides an extensive look at how important airflow ...

The story of how Honda developed an oval-piston race engine that ultimately failed but still made history along the way.

For as long as internal combustion engines have existed, pistons have been round. This wasn't necessarily because circular shapes were optimal for performance. It was simply the easiest and most ...