BBC 454 FORGED DOME TOP PISTON 29.4CC DOME 4.250BORE 5/64

Description

NEXT GEN
DUROSHIELD COATING

With an enhanced
formulation bonded into the
piston surface at the atomic
level, DUROSHIELD delivers
the ultimate combination of
low friction and exceptional
durability, even in the most
critical engine environments.
This technologically advanced
coating is precisely applied
to the piston through a
computer-controlled process.

• New and improved
  protective formulation – Next
  Gen DUROSHIELD graphite
  coating reduces abrasive
  wear,
• increasing the
  anti-seizing characteristics
  when there is insufficient
  lubrication.
• Atomically bonded to the
  substrate, using advanced
  material and manufacturing
  processes.
• Requires
  no increase in skirt
  clearance.

A Quieter Engine

When a piston
reaches either end of the
cylinder, it decelerates.
s can cause it to slap.
However, an engine equipped
with skirt-coated pistons
will run more quietly because
the skirt coating acts as a
“cushion” between the piston
and cylinder wall, reducing
the potential for slapping.

More
efficiency, More power

Skirt coating
reduces friction between the
piston and the cylinder wall,
and provides better surface
lubricity in engines with
extremely
tight-piston-to-bore
tolerances. Speed-Pro
DUROSHIELD POWERFORGED
pistons enable improved
piston-to-bore clearances
which provides a more stable
piston, thereby reducing
leakage from the compression
chamber, improving horsepower
and efficiency.

• Offers even greater engine
  efficiency, friction
  reduction and horsepower
  gains than previous coatings,
  plus better NVH reduction –
  perfect for aggressive
  combustion strategies and
  very high temperatures.
• Significantly reduces
  friction across the entire
  RPM range.
• Helps
  prevent scuffing of skirt and
  cylinder wall.
• Prevents damage from
  inadequate lubrication,
  especially at start-up.
• Improves cylinder sealing
  for less blow-by and more
  power.
• PLUS – Each
  piston features a window that
  is used to measure the exact
  skirt size for precise bore
  clearance.

Piston Specifications
:

• CID:
  454
• Bore: 4.250
• Stroke: 4.000
• Rod
  Length: 6.135
• Compression Height: 1.645
• Compression Ratio with
  107cc chamber volume: 11.18
• Compression Ratio
  with 117cc chamber volume:
  10.08
• Compression
  Ratio with 120cc chamber
  volume: 9.99
• Dome
  Volume: +30.6cc
• Pin
  Type: Press
• Recommended Ring Set: Moly –
  SPE233K STD, STD Fit – SPR990
  STD, File Fit – SPR9590 005
• Coated skirt, 1970
  454-LS6; Closed chamber heads