What horsepower is a ZZ4 crate engine?
355 horsepower @ 5300 rpm
The ZZ4 350 boasts a full 355 horsepower @ 5300 rpm and 405 lb/ft of torque @ 3700 rpm. With its high level of performance and durability, our ZZ4 350 Crate Engine may well be the perfect crate engine for 1955-1982 Corvettes, able to meet the needs of all phases of motorsports.
What generation is a ZZ4?
GM part number 24502609 – ZZ4 Crate Engine, 350 Generation I long block, includes 4 bolt main caps, nodular cast iron crank with one piece rear seal, 10.1-1 Compression Ratio hypereutectic pistons, 5.7″ PM rods, 58cc aluminum angle plug heads, hydraulic roller cam (lift .
What year did the ZZ4 come out?
The ZZ4 version of GM’s crate engine appeared in 1996 and became the longest-running ZZ engine with production all the way through 2014. Official power ratings for the ZZ4 were 355 hp and 418 lb-ft.
What heads are on a ZZ4?
Topping the ZZ4 is the aluminum L98 cylinder head that was available on the pre-LT1 Corvette. The aluminum angle-plug cylinder heads have screw in rocker studs, 1.94-inch intake and 1.50-inch exhaust valves and 58cc combustion chambers that yield a crisp and responsive 10:1 compression ratio.
What size is a ZZ4 motor?
The classic small-block ZZ4 is a quality built 350ci engine rated at 355 hp and 405 lb-ft of torque.
How do I identify a ZZ4 crate engine?
ZZ4 blocks were painted black and the black valve covers have retaining bolts along the valve cover center, not along the edges as with previous small blocks. The timing chain cover is black 200 mph rated black plastic.
Does a ZZ4 have Vortec heads?
In this guise, the ZZ4 averaged 328.5 hp. It made 335 hp with the truck heads and averaged 348 hp with both sets of Vortec Bow-Tie heads, as well as GM’s aluminum Fast Burn heads.
What are GM fast burn heads?
The Fast Burn heads are a 23-degree wedge design developed using the best of GM Motorsports and GM Production cylinder head techniques. The heads can fit either self-aligning rocker arms, as we chose to run, or standard rockers and guide plates.
What is a ZZ4 crate engine?
GM’s 350ci ZZ4 crate engine is a true street engine, designed to run on 92-octane pump gas all day and deliver reliable horsepower for years. Westech unwrapped the ZZ4 and immediately strapped it onto its Superflow 901 engine dyno for its first flogging.