There's no doubt that the valvetrain is the most complex part of any racing engine. It's also pushed the hardest against some incredible stresses. Nextel Cup teams and some manufacturers are putting ...

With the short block assembled for our 383 supercharged project motor, it's time to shift our attention once again; this time to the heads and valvetrain. Like the rotating assembly, when it came to ...

At its most basic level, an engine is an air pump. Internal combustion engines breathe fresh air and expel wasted exhaust gases to make power. Something has to tell those intake and exhaust valves ...

This installment of Toyota's Engines 101 series takes a closer look at one of the most critical parts of an engine: its valvetrain. The video establishes what parts comprise a valvetrain, looks at ...

The Atco engine also needed an overbore, pistons, one rod, and a new set of heads. I had been spinning that engine past 8,400 rpm routinely with the Novi 2000. With the large blower pulley, the engine ...

SAN ANTONIO -- July 30, 2019 -- Southwest Research Institute recently added an additional single cam rig (SCR) to its considerable array of tribology testing equipment. The rig, which investigates ...

We rebuilt the valvetrain in our $100,000 NASCAR engine ...

LONDON, June 18, 2012 /PRNewswire/ -- Due to the increasing urbanisation in Europe and a rising demand for microcars with cost-effective gasoline engines, the European market for variable valvetrain ...

It’s all about rpm, baby. In just about every racing class in existence that limits maximum displacement, the quest to turn more rpm than the next guy rules the day. In classes where power adders are ...