It’s expressed in the degree of rotation.Ī higher magnitude of overlap benefits from Scavenging Effects, but at a lower rpm, a vacuum is produced in the engine and causes a rough idle.

What is Cam Overlap?Ĭam overlap is when intake and exhaust valves are opened together.

You need higher torque to start the vehicle with a heavy load.

While high-speed performance will certainly increase, performance cams are detrimental to lower speeds. You’ll idle a little rougher, but the satisfying rumble of the engine is what some of us want. A performance camshaft – a bigger cam – can and does increase the horsepower of your stock 350 engine to generate more acceleration and torque. Why Use Performance Camshafts:Ĭamshafts are responsible for the duration of valve opening and fuel intake. If you are looking to increase your car’s performance, this cam is the best for you. This camshaft satisfies all the requirements of Stock 350 and is the biggest one you can fit. – The springs fit the vortex head without machine work. Several manufacturers claim to produce the best and biggest cam for Stock 350, but COMP Cams CL12-600-4 is the biggest and best cam for Stock Chevy 350 with: Check the specifications of your stock 350 Engine specifications before getting the biggest cam to delight it. – Lobe Separation Angle (LSA) is the distance between intake and exhaust lobes, choose your cam according to the specification provided with Stock 350.īefore throwing your hard-earned money and beloved Chevy in the wrong hands, ask these questions. A bigger cam usually means more duration. – Duration is the amount of time the valve is kept open or is lifted from the seat. – Lift is the distance that the valves are lifted from the seat or resting position. Basic Operating RPM is the value where the power is maximum. – Operating RPM of the camshaft should match the Operating RPM Range of your Stock 350. There are several variables other than choosing the biggest camshaft for your Stock 350. The camshaft is responsible for Horsepower, Torque, Idle Quality, and more.

What is the biggest cam that fits the original 350?Ī “bigger cam” generally means how big the cam lobes are and the duration of the valve off its seat.

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