Zz4 install

Engine Model Complete exploded views of all the major manufacturers. Brand New!. Tecumseh A Chevrolet Performance Crate Engines.

Part Chevrolet Performance Parts. Write a Review. This item is currently not available. Shop all Chevrolet Performance Crate Engines. Key Specs. See more specs. Need To Know. Need help? Call View the Help Center. Quick and Easy Returns. Return Policy. As far as crate engines go, this one is a winner. Its legendary status is based on an incredible performance level that is stone cold reliable.

The ZZ4 is delivered with an aluminum dual-plane intake manifold, HEI distributor, cast iron water pump, damper, and flexplate. Our Turn-Key ZZ4 crate engine also ships with all the parts you need to get it running. That includes an accessory drive package, fuel pump, chrome air cleaner kit, Holley cfm carburetor, starter, and spark plug wires. I wanted to preserve my original manifolds so I researched alternatives.

Since my car already had the original style side exhausts which I wanted to retain, I needed to find some short style headers that were designed for D-Port heads with angle plugs. Patriot make ceramic coated headers for this application so I went with those.

The ZZ4 stock aluminum intake is slightly higher than the one on your original engine. Having said that, there is still clearance under the later C3 hoods for the original QuadraJet and air breather. If you plan on using your original carburetor you should have it rejetted to take full advantage of the added performance of your new ZZ4.

I decided to go with different carburetion and settled for a Barry Grant Speed Demon. It is basically a 'take out of the box and install' application.

Because I have a standard transmission I went with mechanical secondaries and electric choke. I fabricated a throttle and cruise control bracket from the original QuadraJet bracket. Since the electric choke requires a constant 12V power supply while the engine is running, I tapped into the 12V supply line for the heater motor.

The 12V supply line for the wiper motor will work equally well. For an air breather, I installed a dropped 14". The filter is 3" in height. Update: I was having problems with engine warm up and discovered my problems were with the electric choke. I have since removed the choke completely and the engine runs just fine without it. If was doing this again, I would not buy the Speed Demon with the choke.

One of the components from the original engine that is not transferable to the ZZ4 is the flywheel.