After developing a multitude of custom pistons for Big Block Chevy engines equipped with 20° cylinder heads, like the Dart Pro1 20° and Brodix SR20, the engineering team at JE Pistons has created the 20° BBC Series that combines high quality custom piston features with off-the-shelf convenience. The pistons are available with 23cc and 18cc domes, designed for high horsepower naturally aspirated and nitrous engines with bore sizes from 4.600″ to 4.625″.
Forged in-house from 2618-T6 aluminum, they incorporate many special features that elevate these new 20° pistons above the norm. They include JE’s Ultra-Groove process that creates the industry’s flattest and smoothest ring grooves with tolerances held to a millionth of an inch, vertical gas ports providing a consistent ring seal. Special contact-reduction grooves to reduce friction and minimize detonation, while the power adder accumulator groove provides increased accumulator area without weakening the ring land.
The dome incorporates a fire slot for improved flame travel and combustion efficiency and is designed to accommodate up to 2.450″ diameter intake valves, while the underside is 3D crown-milled to remove all unnecessary weight and reduce the reciprocating mass. Optimum wrist pin lubrication is assured through employing a broach pin oiler with an accumulator groove.
Additional information can be obtained by calling JE’s tech line at 714-898-9763 or by visiting www.JEpistons.com. E-mails can be sent to sales@JEpistons.com.
