What's in a ZZ4?
Probably a little cheaper to rebuild old motor but ZZ4 comes practically complete and with a warranty.
Those are some damn fine internals that can be had for about $3,400. Hard to build a motor yourself with forged steel crank, aluminum heads and roller cam for less. Also, don't forget the 1 year warranty on the ZZ4.
[Modified by 79MakoL82, 1:24 PM 4/29/2002]





ZZ4 Technical Information
Horsepower 355 @ 5250 RPM
Torque 405 @ 3500 RPM
Max. Recommended RPM 5800
Compression Ratio 10:1
Block 10105123 Four bolt main, cast iron
Crankshaft 12556307 Forged steel
Connecting Rods 10108688 PM rods
Pistons 10159436 High Silicon aluminum with offset pins
Piston Rings 12528817
Camshaft 10185071 Hydraulic roller
Lift .47" I, .510" E.
Duration @ .050:208º I, .221º E.
Intake Manifold 10185063 aluminum dual plane
Distributor 1104067 HEI
Cylinder Heads 12556463 Aluminum 58cc combustion chambers
Intake Valves 10168465 1.94"
Exhaust Valves 10168514 1.50"
Valve Springs 12551483 LT4 chrome silicon
Rocker Arms 10089648 1.5 ratio
Valve Lash Zero
Spark Plugs FR5LS Gap .035
RapidFire #5 Gap .045
Fuel 92 Octane
Ignition Timing 10 BTDC @ 4000 RPM
32º total @4000 RPM with vacuum advance disconnected
Technical Notes: Carburetor, spark plug wires, starter, oil filter and oil filter adapter, and exhaust manifolds not included. Distributor P/N 1104067 or melonized distributor gear P/N 10456413 must be used on all crate engines with steel camshafts.
www.spoperformanceparts.com
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