What Size Cam Is In A Stock Chevy 350?

Assuming that the engine is the heart of the vehicle, the camshaft is the vein that supplies the fuel.

The camshaft works by rotating and generating power, which opens the valve. Gasoline enters the cylinder when the valve opens.

Many people believe that the bigger the cam, the better it is. However, this is not the case. Please read the full article below to find out what size cam is in the stock Chevy 350.

Specs for a standard 350 cam

A perfect camshaft can increase the performance of your most powerful engine. The ideal one does not have to be expensive, nor does it have to have all the latest features. The RPM working range is the most important aspect of the camshaft. Because the engine gets the most power here. The ideal RPM range for camshafts is between 2000 and 6500.

To avoid fluctuations when the vehicle is not running, the angle of the exhaust and intake lobes must be well adjusted. The most suitable angle for sinking the exhaust and intake lobes is 107-108 degrees. In addition, the valve lift should be between 0.479 and 0.480 inches.

Nominal camshaft duration should be between 279°-297°, and duration at 0.050 inches should be between 227°-257°.

These should be the best specifications for Stock Chevy 350 camshafts. Let’s now look at the Stock Chevy 350 cam size.

What Size Cam Is In A Stock Chevy 350?

In 1967, General Motors introduced the popular Chevrolet 350 engine, which quickly dominated the market. It was seen in a Chevrolet Corvette, Chevrolet Caprice pickup truck, and small motor home. Let’s take a look at the Chevy 350 camshaft specifications we have in stock so you can buy replacement parts that meet the standards.

Camshaft Specifications

There are two main components in the Chevy 350 engine: the hydraulic camshaft and the hydraulic tappet. In this case, the duration of the intake and exhaust valves is 218 seconds, with each duration being 0.5 RPM.

Likewise, the intake and exhaust valves have a lift capacity of 0.457 inches and a total duration of 268 seconds. The intake valve has a 105-degree lobe centerline and the exhaust valve has a 110-degree lobe centerline. Finally, the rocker arm ratio is one to five.

Size Requirements

It is also critical to understand the size specifications, as the same cam model will come in a variety of sizes. In this case, the two-piston rings have a 4-inch bore and a displacement of 350 cubic inches. The compression ratio of a piston ring is 3.9 inches at 0.622 inches between them. If you are curious about the height, both piston rings measure 1.56 inches.

Also, the minimum diameter of the cylinder head intake port was measured at 1.94 inches. Similarly, the exhaust port of the nozzle must have a minimum diameter of 1.5 inches. The connecting rod has a stroke of 3.48 inches and a length of 5.7 inches.

Torque specifications

After the size is determined, the torque specification must be matched. The camshaft is highly dependent on timing, and the torque of the three bolts connected to the timing chain is 20 ft-lbs.

The torque on one rod bolt connecting the piston to the crankshaft is 20 ft-lbs on three of them. The tightening torques of the second and third bolts are 45 and 75 ft-lbs, respectively.

What is the biggest cam for stock 350?

The COMP CL12-600-4 cam is the largest cam in the 350 inventory and has served as the primary cam since 1976. This Chevrolet cam can increase horsepower and torque. This is the best cam kit for 350 small parts because it can run for many years without breaking.

How much HP does a cam add to a 350?

There is no simple answer to this question because it depends on several factors. However, after installation, the engine performance is expected to increase by 20 to 30 hp.

What is a good cam for a stock 350?

We cannot provide straightforward answers to your questions here either. This is because there are numerous factors to consider, and the most appropriate factor is determined by the owner’s preferences and objectives.


What is the best cam for a stock 350?

Because of its excellent motion change capability, the Chevy 350 stroke cam is one of the best cams in the stock 350. Its lobe separation unit exceeds 100 degrees, and its RMP ranges from 2200 to 6100.

What is considered a mild cam?

RV or drive camshafts are considered mid-performance or economy camshafts, and their LSA is usually narrow, ranging from 112 to 114 degrees. These camshafts have a lot of overlap, which results in a lot of mid-range torque and a lot of power at high rpm, but the idle quality is poor and the idle vacuum is low.

How big of a cam can I put in a stock 350 vortec?

Unmodified sprinklers with head supports and gaskets allow elevation in the range of 0.420″ to 0.470″, but this must be verified per sprinkler. You will need a spring if you do not have a spare cam.

What gives a cam a rough idle?

The intake charge is pushed back into the intake port as a result of the delay in closing the intake valve, resulting in excessive oil pressure. This charge returns through the venturi, destroying the signal used by the carbs to meter fuel into the air.

How much HP can a Vortec 350 handle?

One location near the 240HP area (stock, ordered by interior parts installed). Performed a dyno in a zone around 300HP on the Dyno without accessories. However, the nozzle flow is sufficient to achieve 400HP.

Final Thoughts

We hope you have an immediate answer to this question, what size cam is in a stock Chevy 350? Now you can search the aftermarket for the best cam for your vehicle.


Hi, I'm the initiator and writer of this blog. Cars were and will be my first love, and my favorite hobby, that's why I decided to start this blog and write about my discoveries and techniques to improve my cars or repair them.