Common questions

Is the ZL1 aluminum block still in use?

Is the ZL1 aluminum block still in use?

Four-bolt steel main caps are used with the three center caps featuring splayed bolts on the outer holes. Water and oil holes are capped with AN style O-ring plugs. The ZL1 aluminum block is still available from Chevrolet Performance. The original engine came with a mechanical flat-tappet camshaft.

Can you build a replica of a Chevy ZL1?

The ZL1 is still one of the most coveted engines for Chevrolet enthusiasts, but the chances of getting your hands on a factory ZL1 is slim. Unless luck is on your side or you are willing to re-mortgage your home, building a replica is going to be your best bet.

How tall is the big block on a Chevy ZL1?

Even though most components are no longer available for the ZL1 through Chevrolet Performance, perhaps the most important component still owns a full-page spot in its catalog. The block, made from 356-T6M aluminum with cast-iron cylinder sleeves, comes in the standard 9.800-inch deck height with 4.240-inch bores.

What kind of camshaft does Chevy ZL1 have?

The ZL1 aluminum block is still available from Chevrolet Performance. The original engine came with a mechanical flat-tappet camshaft. However, the block has been updated to include provisions for installing a hydraulic-roller camshaft. It also will accept up to a 4.375-inch stroker crankshaft.

What kind of engine did the Chevy ZL1 have?

The new ZL1 consisted of an all-aluminum cylinder block along with the L88’s aluminum heads. The internals were all race quality for the time and as it turns out, all ZL1 engines went through a special “audit” at the Tonawanda engine plant (obviously adding more cost to the bottom line).

Four-bolt steel main caps are used with the three center caps featuring splayed bolts on the outer holes. Water and oil holes are capped with AN style O-ring plugs. The ZL1 aluminum block is still available from Chevrolet Performance. The original engine came with a mechanical flat-tappet camshaft.

The ZL1 is still one of the most coveted engines for Chevrolet enthusiasts, but the chances of getting your hands on a factory ZL1 is slim. Unless luck is on your side or you are willing to re-mortgage your home, building a replica is going to be your best bet.

Even though most components are no longer available for the ZL1 through Chevrolet Performance, perhaps the most important component still owns a full-page spot in its catalog. The block, made from 356-T6M aluminum with cast-iron cylinder sleeves, comes in the standard 9.800-inch deck height with 4.240-inch bores.

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Ruth Doyle