When did Chevy start making small block heads?
When did Chevy start making small block heads?
In 1986, Chevy debuted the L-98 Corvette engine with aluminum heads. At first these seemed to be an excellent way to upgrade a small-block with factory aluminum castings. The heads are a 40-lb weight saver, but these heads are completely underwhelming as a street performance candidate.
Where to look for cracks in Chevy small block heads?
Places to look for cracks include the combustion chamber area between the valves and also in the top part of the head around the spring pockets. The big cork for better horsepower is really on the exhaust side of all production small-block Chevy heads.
How big is the valve on a Chevy small block?
The stock valve size for this head is the 1.94-inch diameter. The test data included in our flow info is a little different in that this head was fitted with a 2.02-inch valve. The catalog states that the larger valve can be added with a new valve job, which is what happened on this head.
What are the casting numbers on a Chevy cylinder head?
Chevy cylinder head Identification – Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Find cast numbers Cylinder Head ID Use these casting numbers to identify the heads you have. Small Block Casting numbers
What kind of head does a small block Chevy use?
All LT1 engines use center-bolt valve covers. Standard Gen-I small-block Chevy heads position the valves at a 23-degree angle to the deck. In 1989, Chevy introduced the 18-degree Bow Tie aluminum head that shifted the valve-angle vertically, while simultaneously raising the intake port to take advantage of this angle.
Can a 1987 small block engine be replaced?
These cylinder heads are direct replacements for OEM heads on 1987 and newer GM Small-Block V-8 engines. Save time and worry by replacing tired or damaged cylinder heads with new ones from Chevrolet Performance.
What kind of cylinder heads do Chevy performance use?
Chevrolet Performance Small Block Chevy Cast Iron Vortec Cylinder Heads. America’s favorite high-performance cast iron small block cylinder heads offer big power and bigger value. Chevrolet Vortec Cylinder Heads’ fast burn combustion chamber and high-velocity ports combine to produce big horsepower.
When was the first small block cylinder head made?
One of the most influential small-block cylinder heads ever made was manufactured in the late 1950s. Casting number 3836842 cylinder head first showed up in 1957 model Chevrolets equipped with the 283ci V8 engine. All Chevy V8 engines, from the big-blocks to the LS engine platforms of today, evolved from this 283 small-block family.
