DSS 2020 preview

Piston Comparison

Piston Comparison Chart

Features:

ESeries SX 1-FX 2-FX 3-FX

X X X X

Broached pin oiling slots Forged drain-back windows

Slightly larger, deeper valve reliefs than OEM Premium Aircraft spec. 4032 low expansion alloy

X

X

Premium Aircraft spec. 2618 alloy Drilled, forced wrist pin oiling

X X X X X X X X X X X X X X X X X X X X X

X X X X X X X X X X X X X X X X X X X X X X X X

X X X X

X X X X X X X X X X X X X X X X X X X X

Drilled bottom ring land intersecting oil groove drain-backs

Blower, Turbo, NOS ready

CNCmachined valve reliefs for moderate performance heads and camcombinations Larger, deeper CNCvalvereliefs formoreaggressivecylinderheadandcamcombinations

Brushed piston crown

Turned dish

X

X

Max Quench milled dish

Additional CNC milling for weight reduction in non-critical areas Patented “X Groove” skirt for superior cylinder and ring life Thinner/shallower Ring grooves for maximum ring seal and land strength

Low volume contact reduction grooves

2nd ring land accumulator groove prevents ring flutter

3rd ring land scraper relief Oil ring groove relief reservoir

Inner and outer pin boss weight reduction radiusing

Tighter control of crown thickness yields constantly lighter parts Dynamic skirt milling controls skirt thickness for consistently lighter parts

Precision-honed piston pin bores Diamond-turned high strength skirts

X X X

X X X

High-strength piston pins Extreme Duty XR wrist pins

Horizontal Gas Ports enhance ring seal Forged and machined in the U S A

X

X

X

X

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