The modern HEMI V8 isn't a hemi engine in the true sense of the word, and it uses two spark plugs per cylinder instead of one ...

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 ...

Virtually all current production-based cylinder heads incorporate a cross-flow design with intake ports (Photo B) located on one side of the head and exhaust ports (Photo C) on the opposite side. Some ...

The core of the problem with iron small-block Chevy heads is that there aren't any (cores, that is). It is becoming more and more difficult for the professional engine builder or weekend mechanic to ...

When it comes to bang for the buck, it's hard to beat a big-block Mopar. The wedge engine (named for its wedge-shaped combustion chamber) is a great combination of torque and horsepower and responds ...

To understand and appreciate what Al Barnes has been able to accomplish, we should first examine some of the ingredients of a high-output small-block Chevrolet. This step will enable us to establish ...