How to Build a Fuel Efficient Small Block Chevy
- 1). Disassemble, clean and machine flat a small block Chevy engine to rebuild. Secure it to a four-point engine stand and install the crankshaft and main bearing caps. Turn the engine block so the top of the engine is pointing up.
- 2). Install flat pistons and rods that extend the pistons to a 0.40 quench gap. Secure the piston rods to the crankshaft journals using piston bearings. Oil all internal parts well during installation. Put the oil pan back on the motor using a new gasket and wrenches to tighten the pan to the engine.
- 3). Lubricate a camshaft that is made for the small block engine and is made for a vehicle that has a high axle-gear ratio. A non-exotic camshaft is recommended for reliable performance with improved gas mileage. Replace the engine lifters and valve push rods before lashing (adjusting) the valves. Tighten the rocker arms with a wrench and check for clearance with a feeler gauge.
- 4). Install a performance air intake. Secure the intake to the top of the motor using a wrench and intake bolts. Return the valve covers and timing chain cover to the engine with new gaskets using wrenches to tighten the bolts.
- 5). Cut a piece of exhaust tubing and connect the dual exhaust pipes coming out from the exhaust manifolds. Turn the tubing into an exhaust crossover. Have the tubing welded in place after cutting openings in each exhaust pipe to be welded to the new insert.
- 6). Assemble the remaining parts and make the connections to the engine after placing it back inside the engine compartment of a vehicle. Put the exhaust manifolds back onto the motor and connect the exhaust with crossover pipe.
- 7). Install a high-flow air filter like K&N performance filters. Place it inside an air box on top of a carburetor or to the end of the intake tube of fuel injected vehicles using a hose clamp and screwdriver.
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