![]() Radical cams affect the engine at idle as well as the behavior of the engine in low speed situations. A cam which keeps the valves open longer means the combustion chamber can be filled and emptied better. Cams open and close the valves inside the combustion chamber. The cost is less than $200 for the manifold and under $400 for a reconditioned carburetor. ![]() Horsepower increases for carburetor and manifold are dependent on the rest of the engine however, gains from 20 to 50 horsepower and the same number in foot-pounds of torque is reasonable. ![]() After-market carburetors and manifolds offer bigger pathways for the fuel-air mixture with smoother surfaces and faster air flow. If you push more fuel/air mixture into the engine, more horsepower comes out. The new headers allow for a bigger carburetor and manifold. Headers cost under $200 and an afternoon in the garage.īuy a new carburetor and intake manifold. Headers bolt onto the block and attach to the stock exhaust pipes and catalytic converter. Chevy High Performance Magazine installed a set of Hooker headers onto a stock engine and saw an immediate increase of 16 horsepower and a more dramatic increase of 53 foot-pounds of torque. Adding headers simply brings that part of the system up to par with the rest of the parts. The performance suffers because of the small exhaust setup. The carburetor, manifold and valves are big enough to start with. The easiest performance enhancer on the Chevy 350 is a new exhaust system because it's the weak point in the stock setup.
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