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ULTRA SERIES PISTONS
Ultra Series pistons are the cream of the crop, combining all of JE’s premium features into a ready-to-ship shelf
part. Ceramic crown treatment, lateral gas ports, Perfect Skirt coating, accumulator grooves, thick-wall wrist
pins, double pin oilers, and a premium, carbon-steel ring pack are all part of the winning formula. In addition to
the all-star feature list, Ultra Series pistons incorporate a revolutionary, new forging style that strengthens the
piston at the material level outward. Grain-Flow Optimization is a breakthrough, and proprietary, piston forging
technology and the result of tireless research and development of the in-house JE forging process. For the first
time, engineers are able to precisely control metal grain direction around key structural elements of a piston,
such as the crown and pin bosses, for exceptional strength improvements. All these traits combine to make
the new Ultra Series the most technologically advanced, and feature rich, JE piston line to date.
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COATINGS
Piston Coatings
A DD
E C
B
A. The Thermal Barrier Crown Coating is applied to the top of the piston and is designed to reflect heat into the combustion chamber, thereby
increasing exhaust gas velocity and greatly improving scavenging potential. The .0015” thick coating can also assist in extending piston life by
decreasing the rate of thermal transfer.
B. Skirt Coating. JE now offers a skirt coating that is applied using a new process that does not require spray application. This coating offers many
of the same benefits of our Tuff Skirt, at a much lower cost. All SRP Professional pistons now include this new skirt coating process.
C. Tuff Skirt is a JE Pistons’ trademark coating that is a lubricating, anti-friction/ anti-wear coating applied to the piston skirt only. Unlike our standard
Skirt Coating, Tuff Skirt will not wear and is designed to withstand many different types of endurance applications, similar to those commonly found
in NASCAR. Buildup is .0005” per surface and finished diameter of skirt should include the coating buildup.
D. Anodized Ring Groove Coating. Reduces wear and material transfer between the ring and groove. Shown to be very durable in maximum effort,
high endurance applications. Appropriate manufacturing allowances apply.
E. KoolKote is an aerospace quality hard anodize applied to all surfaces of the piston with a buildup of .001”. This coating is designed for use in nitro-
methane engines such as Top Fuel Drag Racing to endure the corrosive effects of this fuel type. It will withstand greater temperatures and will not
flake, chip or peel. This coating does alter the heat transfer and expansion characteristics of the piston. Consult the JE Pistons technical department
for specific applications. Manufacturing allowances are required on all surfaces.
Perfect Skirt TM En plating
Perfect skirt is a proprietary and patented skirt coating only offered Help reduce pitting and piston ring micro welding caused by
by JE Pistons. Perfect Skirt is three-times thicker than traditional detonation with JE’s Electroless Nickel plating. Unlike other metal
plating that loses hardness and softens when exposed to heat,
skirt coatings to allow racing pistons to have tighter piston-to-wall
clearances similar to OEM applications. This decreases piston Electroless Nickel gets harder as it runs. The plating is applied to the
noise on startup and reduces cylinder bore wear. Additionally, this piston domes, ring grooves, and wrist pin bore to provide a lower
is beneficial for late-model engines, reducing the possibility of false coefficient of friction, reduce ring blow-by, and increase detonation
knock sensor readings. Perfect Skirt will continuously conform to the protection. In addition, Electroless Nickel reflects heat and aloows
shape of your cylinder’s bore. domes to run to 68 degrees cooler...
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