What Does More Cam Duration Do?

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 does more cam lift do?

More cam lift means the valve will open further. Increasing cam lift will allow more air or exhaust to move through an engine. If you plan on upgrading your cam to increase lift, you must be sure your valve springs are capable of handling a cam with increased lift.

How do I choose a good camshaft?

The rpm range is the range where the engine performs best. When selecting a camshaft, choose one with an rpm range that matches the other components of your vehicle and its intended use. Follow this link for more about Basic Operating RPM Range.

What happens if cam timing is off?

If the engine timing of the cam is off, your car will either be running rough or not at all. If the ignition timing is the problem, it isn’t as easy to notice because it has four cycles: Intake valve sucks in air while fuel is delivered by the injectors. The fuel mixture is reduced.

How do I check my cam timing?

Begin as you did before with a dial indicator on the lobe of the cam. This time, however, position the cam so the dial indicator is sitting on the base circle (zero lift) and zero out the dial. Rotate the engine in the normal direction of rotation until you have 0.050 lift and look at your degree wheel.

What is more important lift or duration?

Designing a cam profile with more lift results in increased duration in the high-lift regions where cylinder heads flow the most air. Short duration cams with relatively high valve lift can provide excellent responsiveness, great torque, and good power. But high lift cams are less dependable.

What gives a cam a choppy idle?

Overlap causes misfires at idle and that makes the lope or choppy idle. It causes a lot of intake reversion which causes the engine to basically choke on it’s own exhaust during idle. In this regard, what causes a cam to lope? Lope is a result of the intake and exhaust valves both being open at the same time.

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.

What causes a cam to lope?

Lope is a result of the intake and exhaust valves both being open at the same time. This is called overlap. Mild cams have little or no overlap at any valve opening that makes a difference. Hotter aftermarket type cams have a lot because it aids high RPM breathing.

Does a cam change the sound?

cam controls the valve action and timing. better cylinder filling = more compression, bigger BOOM sound. engine is louder. simply put.

How does Cam duration affect performance?

How does it affect performance? At high rpm, longer intake duration fills the cylinder. … This results in lower cylinder pressure and less low-end power. Long duration camshafts also create more Valve Overlap.

What happens if ignition timing is too advanced?

If ignition timing is too far advanced, it will cause the fuel-and-air mixture to ignite too early in the combustion cycle. This can cause the amount of heat generated by the combustion process to increase and lead to overheating of the engine.

Should I advance my cam timing?

Advancing or retarding a camshaft’s timing from its original “zero” position causes the valve events to happen either earlier or later in the engine’s cycle. … On the other hand, if the camshaft timing is retarded, the intake valve will close later (usually sometime during the compression stroke).

How much horsepower will a cam 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.

What is considered a long duration cam?

A 280-degree-duration cam holds the valves open longer than a 260-degree-duration cam. Holding the valves open longer allows more air and fuel into the engine and also allows more to get out through the exhaust. Longer duration (higher number) improves top-end power but almost always sacrifices low-end torque.

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 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.