ZZ572/720R Deluxe Crate Engine
685 lb.-ft. @ 4,500 rpm 720 hp @ 6,250 rpm
Our baddest, most powerful big-block engine is ready for the strip!
A 10-second car is quick, but the ZZ572/720R could achieve that with a couple of its spark plugs left in the pits. It is the king of all Rat engines and is capable of pulling your bracket racer or heads-up challenger down the 1320 in the 9-second range.
The ZZ572/720R’s true value lies in its ready-to-run status when delivered. Rather than waiting weeks for a racing engine shop to build a custom combination, we deliver the ZZ572/720R fully assembled; just bolt on the included Dominator-style 1150-cfm carburetor, along with a starter and fuel pump (not included) and you’re ready to go.
The ZZ572/720R is built with the best stuff we can find, inluding an all-forged rotating assembly, rectangular-port aluminum cylinder heads with 113cc intake ports and 2.25/1.88-inch valves. There’s also a solid roller camshaft with 0.714/0.714-inch lift.
If you’re building the ultimate dual-purpose car, the ZZ572/720R is suitable for limited forays on the street. It has a 12.0:1 compressionratio, so make sure you’ve got access to 110-octane gasoline before hitting the local cruise night!
ZZ572/720R Deluxe Crate Engine Installation Notes
Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installed
Clutch linkage boss is 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
Requires addition of starter, ignition coil, and fuel pump (not included)
Gen VI tall-deck block has machined mechanical fuel pump boss
Designed for pre-1976 street vehicles or any off-road vehicles
Not intended for marine applications
Big sticky slicks will help hook up this monster
ZZ572/720R Deluxe Crate Engine Tech Specs
Engine type: Chevy Tall Deck Big-Block V-8
Displacement (cu in): 572
Bore x stroke (in): 4.560 x 4.375
Block (p/n 19212195): Cast-iron with 4-bolt main caps
Crankshaft (p/n 88961554): Forged steel
Connecting rods (p/n 88962926): Forged steel, shot peened
Pistons (p/n 88963227): Forged aluminum
Camshaft type (p/n 88962216): Mechanical roller
Camshaft lift (in): .714 intake / .714 exhaust
Camshaft Duration (@.050 in): 278° intake / 282° exhaust
Cylinder Heads (p/n 88961160): Aluminum rectangular port, 118cc chambers
Valve size (in): 2.250 intake / 1.880 exhaust Stainless steel
Compression ratio: 12:1
Rocker arms (p/n 12361323): Aluminum roller style
Rocker arm ratio: 1.7:1
Distributor (p/n 10093387): Electronic ignition
Carburetor (p/n 19170096): 1150-cfm Dominator
Water pump (p/n 19168602): Aluminum, short-style
Spark plugs and wires: Included
Recommended fuel: 110 octane race gas
Ignition timing: Base 8° BTDC, 36° Total
Maximum recommended rpm: 6,750