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CRATE ENGINES BIG-BLOCK
ZZ454/440
12498777
A classic 454 big-block with high-flow
aluminum heads that delivers 500 lb-ft
We took the tough 454 HO partial engine —with its super-tough, all-forged
reciprocating assembly—and matched it with a set of higher-flow, ovalport
aluminum cylinder heads to create the ZZ454/440. We picked up
an additional 15 horsepower while maintaining an incredible 500 lb-ft of
torque. The lightweight aluminum heads also help save weight on the
nose of a Camaro, Nova or other street/strip machine.
The ZZ454/440 uses our new cylinder block casting that offers greater
strength and performance (see page 230 for details), while the aluminum
heads use smaller, 110cc combustion chambers to boost compression to
9.6:1 (up from 8.5:1 on the 454 HO). We then match the airflow capability
with a high-lift, hydraulic roller camshaft that delivers great idle quality and
requires no periodic lash adjustments.
Our crate engine package delivers the ZZ454/440 assembled with a water
pump, balancer, aluminum intake manifold and a 14-inch flexplate. Your
GM Performance Parts dealer can hook you up with the carburetor, starter,
ignition system and other accessories required to get this big-power Big-
Block started.
powerful Big-Block for tHe street
great comBo for early camaro
440 Hp / 500 lB-ft torque
INSTALLATION NOTES
• Requires addition of carburetor, starter,
distributor and ignition system (not included)
• Clutch linkage bosses are now drilled and
tapped. When using cast-iron exhaust manifolds,
lower head bolts may need to be replaced with
bolts with shorter heads, for clearance
• Comes with an externally balanced 14” automatic
transmission flexplate; use flywheel P/N
14096987 and 11” clutch assembly for manual
transmission applications
• Designed for pre-1976 street vehicles or any
off-road vehicle
• Not intended for marine applications
12498778
454 Partial engine
The sturdy foundation of the
ZZ454/440 is the starting point of a
custom engine build. Use externally
balanced flywheel for manual transmission
applications.
CRATE ENGINES BIG-BLOCK
zz454/440 dynO CHArt
POssible APPliCAtiOns*
zz454/440 teCH sPeCs
a hot rod that deserves a Big-Block
with aluminum heads
t he starting point for a new
race car
a bright red 1969 camaro
*Applications have not been validated.
They are merely suggestions of how you
might enjoy your GM Performance Parts
crate engine. Some applications may affect
engine warranty. See page 352 for specific
warranty information. Some applications
may not be emission-legal; check state and
local ordinances.
Part Number: 12498777
Cylinder Heads (P/N 12363392): Aluminum oval port; 110cc chambers
Engine Type: Chevy Big-Block V-8
Valve Size (in):
2.19 intake / 1.88 exhaust
Displacement (cu in): 454
Compression Ratio: 9.6:1
Bore x Stroke (in): 4.25 x 4.00
Rocker Arms (P/N 12368082): Stamped steel
Block (P/N 19170538):
Cast-iron with 4-bolt main caps
Rocker Arm Ratio: 1.7:1
Crankshaft (P/N 14096983): Forged steel
Water Pump (P/N 19168606): Cast-iron, long-style
Connecting Rods (P/N 19170198): Forged steel
Flexplate (P/N 10185034): 14"
Pistons (P/N 10215228):
Forged aluminum
Recommended Fuel:
92 octane
Camshaft Type (P/N 24502611): Hydraulic roller
Ignition Timing:
Base 4° BTDC, 26° Total
Camshaft Lift (in):
.510 intake / .540 exhaust
Maximum Recommended rpm: 5500
Camshaft Duration (@.050 in): 211° intake / 230° exhaust
Balanced:
External
NOTE: Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage will occur.
Available for purchase online at
gmperformanceparts.com
GM Performance Parts Crate Engines include a 24-month
or 50,000-mile/80,000-kilometer limited warranty.
GM Performance Parts does not utilize any used
or remanufactured parts in this crate engine.
For a complete list of parts to complement and finish this engine, turn to page 114.
98 Buy online at www.gmperformanceparts.com
Buy online at www.gmperformanceparts.com
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