What Do Cam Numbers Mean?

What gives a cam a rough idle?

The overlap of the exhaust valve closing and intake valve opening causes the engine to be inefficient at low speed which results in the lumpy idle.

The closer the Lobe Seperation Angle the more the overlap, the more duration the more (typically) the overlap..

What is the advantage of a roller cam?

Roller cams also allow for steeper lobes. In other words, they allow for more “area under the curve.” This means the valve opens faster and remains at a higher lift for a longer period of time. This allows for more airflow and more power. When changing cams, roller lifters can be re-used.

What is a good camshaft duration?

Cams with durations in the 195 to 210 degree range (measured at . 050˝ cam lift) are usually considered best for stock unmodified engines and those with computerized engine controls. … A cam with a duration of 240 degrees of higher will typically produce the most power from 3,500 to 7,000 rpm.

What is the biggest cam for stock 350?

What is the biggest cam for stock 350? The biggest cam will be the COMP Cams CL12-600-4 Thumpr 227/241 Hydraulic Flat Cam. This can also be regarded as the best cam for stock 350 chevy.

What is an aggressive cam?

In summary, an aggressive cam is one with large acceleration (both positive and negative), jerk and ramp velocity. An aggressive cam will open and close quickly, i.e. will have low Intensity.

What is Cam rpm range?

Definition & Description. The basic operating rpm range for a camshaft is its “sweet spot.” This range is where the engine will produce the most Torque and Horsepower.

Does a cam change compression ratio?

A camshaft will affect cylinder pressure not compression ratio. Static compression ratio is based on fixed mechanical features of the engine: Cylinder Bore diameter, compression height of piston, combustion chamber size, head gasket thickness, etc..

How does a camshaft increase horsepower?

Performance cams increase the duration and timing of the valve openings during the engine stroke, increasing horsepower and making your car accelerate more quickly. You’ll idle slightly rougher with a performance cam, but get a throaty rumble that’s desirable for some gearheads, depending on your vehicle.

What is considered a mild cam?

A mild cam is usually a little bigger than the stock cam. Most of the “Mild” cams have just a bit of lope to them and will give you a bit more power than the stocker. My car, unfortunately, has a mild cam in it with it’s TR224. Still makes more power than stock but idles and rides real close to stock.

How do I identify my camshaft?

Examine both ends of the camshaft. The end of the camshaft will be embossed with a two-digit engine prefix code, a grind number, and the series name of the camshaft. These three pieces of information will allow a consumer to identify the specifics of a given camshaft.

How much horsepower can a camshaft add?

Other cams can add as much as 50 HP or more, but the more power you get from a cam, the higher up the powerband the power usually starts. If you have a 224/224 cam (instead of my 205/212), you may have to wait until 2500 or 3000 RPM to get power, but it will be more.

How do you tell if your car has a aftermarket cam?

A car with a cam will idle a little funny. The stock cam will rock the car back and forth every once in a while when it’s hot out but, a car with an aftermarket cam will really get moving at times. If it sounds like and rocks like a 60’s muscle car….it probably has a cam.

How do I identify my Chevy camshaft?

Locate the ID number on the camshaft. It is typically located in the center of the cam between the lobes. The ID number will consist of either eight or nine digits; the last four numbers identify the cam and its specific application. Match the number to a Chevrolet camshaft part number listing.

What is Cam grind number?

The grind number gives you the basic cam info. Like the Crane 274HO6-tells you the adv. duration is 274 degrees, H is for hydraulic, an 06 tells you the lobe separation angle of 106. Part number is 100172 which really tells you nothing. The cam companies all have their own “grind numbers”.

Can you cam a stock engine?

Registered. You can’t swap just the cam and nothing else. Not counting the fact that sticking in a big cam in a stock engine and it running worse due to a mismatch with cylinder head and intake airflow, at the very least you MUST swap the springs.

What cam specs mean?

The definition is simply the distance in degrees, as measured on the cam, between the point of peak lift on the intake lobe and the peak lift on the exhaust lobe. … Some given measurements, such as lift and duration, are easy enough for even the neophyte camshaft connoisseur to understand.

What is considered a big camshaft?

It is listed in degrees of crankshaft rotation. When someone refers to a “big cam,” they mean it has longer duration, not higher Lift. … Duration at 0.050″ is the degrees of crankshaft rotation between when the lifter is raised 0.050″ and when it is 0.050″ from its resting position.

What makes a cam lopey?

cams lope because of events, they open valves because of events, they do it at certain times because they are events. The smaller the lsa the larger the chance for overlap.

What is a Stage 1 Cam?

The LS1 Stage 1 camshaft was designed for enthusiast who want to increase power while maintaining excellent drivability and manners. … This Cam Motion hydraulic roller cam delivers smooth idle, excellent low end torque, and extended RPM capabilities over the stock camshaft.

Does a bigger cam give more power?

generally the bigger the cam, the more power it makes it top. you can somewhat change that by retarding the cam to make more power down low. Actually, retarding a cam should move the power farther up in the powerband, usually a few extra HP up top (or few more RPM’s) in exchange for a few lb-ft down low.

How does a cam effect vacuum?

That means more duration for both the intake and exhaust lobes, because at high rpms it can be difficult to get air and fuel into the combustion chambers and exhaust gasses back out in time. … Together, those qualities in a camshaft harm the amount of vacuum any engine will pull in the intake manifold plenum.