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ZZ454/440
440 HP With Aluminum Heads
P/N 12498777
The
ZZ454/440 offers tremendous value in a big-block crate engine. Based on the proven
454 HO with its Gen VI 454 block, the addition of GM Performance Parts Signature
series aluminum heads, reduces weight and increases horsepower to 440, which is
up from the 454 HO’s 425 HP rating.
The ZZ454 shares its forged crankshaft and connecting rods with GMPP’s 454 HO and the family of famous 502 crate engines, so you
know it’s strong. Forged pistons fill the block, and a steel roller camshaft times the valves. Complete with dual-plane intake manifold, water pump, torsional
damper and automatic transmission flexplate, the ZZ454 is on valve packed big-block crate engine.
With its throttle responsive 9.6:1 compression ratio, the pump gas friendly ZZ454 is a great choice for muscle cars, bracket racers
and off-road truckers. Just add your 850 cfm carburetor, GM HEI distributor, and 2-1/4” primary headers and you’re ready to rip. |
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INSTALLATION NOTES:
• Requires addition of carburetor, starter, distributor and ignition system (not included)
• Clutch linkage boss is cast into block, but must be drilled and tapped.
• When using cast iron exhaust manifolds, lower head bolts may need to be replaced with shorter heads, for clearance.
• Comes with a 14” automatic transmission flexplate.
• For manual transmission applications, use flywheel P/N 14096987 and a suitable 11” clutch assembly.
• Distributor P/N 93440806 or melonized distributor gear P/N 10456413 must be used on all crate engines with steel camshafts.
• Intended for 1979 and earlier pre-emissions street vehicles or all off-road vehicles.
• The ZZ454/440 is not intended for marine applications. There is no warranty if used for marine applications. |
PARTS THAT WILL WORK WITH THE ZZ454/440:
12498733 - Deluxe Serpentine Accessory Belt Drive System
12485506 - Holley 750cfm Carburetor
12366996 - Holley 850cfm Carburetor (Recommended and this is the one used to obtain the ZZ454/440 HP and Torque rating.)
93440806 - HEI Distributor
12495078 - Spark Plug Wires and Loom Kit
09000852 - Lightweight Starter
25534323 - Black Powder Coated Valve Covers |
| Horsepower |
440 @ 5250 RPM |
| Torque |
500 Ft. Lbs. @ 3250 RPM |
| Max. Rec. RPM |
5500 RPM |
| Compression Ratio |
9.6:1 |
| Displacement |
454 c.i.d. Big-Block |
| Block |
12550307 Gen VI Bare Cast Iron, Standard 454 Deck Height (Short Deck 9.800”), Four-bolt Main Bearing Caps, Fuel Pump Pad, 4.25” Cylinder Bores,
One-piece rear main seal design. Maximum cylinder bore is 4.25” plus .060” O.S. (Casting number 12550313) |
| Bore |
4.250” |
| Stroke |
4.000” |
| Crankshaft |
14096983 Forged 1053 Steel, One-piece Rear Main Seal Design, Externally Balanced |
| Connecting Rods |
10198922 Forged 4340 steel, Magnaflux Inspected, Shot Peened, HD 7/16” Dia. Rod Bolts With Knurled Shanks, Pressed Pin |
| Pistons |
10215228 Forged Aluminum, Wrist Pin, Std., 8.75 To 1 Compression |
| Piston Rings |
12523921 Std. |
| Camshaft |
24502611 Steel Roller (Valve lift: .510” I, .540” E; Duration @ .050” 211° I, 230° E), Lobe Center Line 112° |
| Lifters |
17120061 Hydraulic Roller Tappet |
| Guide Retainer |
12551399 Roller Tappet Valve Lifter Guide Retainer |
| Cylinder Heads |
12363399 Signature Series 356-T6 Aluminum Alloy Bare Head With Seats And Guides.
Oval port, 110cc simi-open combustion chamber, 7/16” Rocker Stud Holes.
Accepts all stock accessory brackets except Gen VI where the bracket holes have
been enlarged to 7/16” The roller studs and exhaust bolt holes are heli-coiled
for strength. High velocity 290cc intake runners enhance mid range throttle response
and torque. 110cc exhaust runner volume. Casting number 14097088. |
| Intake Valves |
12366986 2.19” Stainless Steel, 11/32” Stem Size |
| Exhaust Valves |
12366988 1.88” Stainless Steel, 11/32” Stem Size |
| Valve Springs |
12462970 Dual valve springs, 1.514” coil outside dia., 1.940” installed height, 140 Lbs. seat pressure |
| Valve Spring Retainers |
12366990 Valve Spring Cap With Seal. |
| Valve Covers |
12553666 And 12553667 |
Rocker Arms
|
12368082 Hardened Stamped Steel Long Elongated Slot Roller Rockers, 1.7:1 Ratio. With Balls And Nuts. |
| Push Rods |
10227762 Intake 3/8” Dia., 12553667 Exhaust 3/8” Dia. |
| Intake Manifold |
12363420 Aluminum High Rise Dual-Plane, Oval Port, Holley Square Flange. Spread bore with dual bolt pattern. |
| Carburetor |
None: 850cfm Recommended. |
| Rear Main Seal |
One-piece Design |
| Water Pump |
12484890 Cast Iron Long Leg Design |
| Oil Pan |
10240721 6 Quart, 7 quarts with one quart capacity oil filter, Pick-up Truck (10 20 Ser Truck) |
| Oil Filter |
Long - PF1218 (GM 25160561), Short - PF454 (GM 25324052) |
| Windage Tray |
14097040 Baffle Oil Assembly |
| Timing Chain |
10114177 Single Roller Design |
| Timing Cover |
10230954 Aluminum With Timing Indicator |
| Damper |
10216339 8” Counterweighted Torsional Damper |
| Flexplate |
10185034 14” Diameter, 168 Tooth, Dual Bolt Pattern Design. For automatic transmission. |
| Distributor |
None: GMPP’s 93440806 H.E.I. Recommended |
| Ignition Timing |
36° Total @ 3,000 RPM with vacuum advance disconnected. |
| Spark Plugs |
#4 Rapid Fire - Gap .045, R43XLS - Gap .045 |
| Fuel |
92 Octane Pump Gas |
