Quick Answer: How Do You ID A Camshaft?

How do you measure the lift on a camshaft?

Lobe Lift is the amount (usually in inches) that the cam lobe increases in radius above the cam base circle.

Tip: To quickly find maximum lobe lift, measure the base circle of the cam and subtract it from the thickness across the cam lobe’s highest point (see the diagram below)..

How do you degree a camera without a CAM card?

Rotate the engine so that the lifter rises . 050″ off the cam base circle. Write the number indicated on your degree wheel in Intake Valve Opens at _______. Then continue rotating the engine and note the dial indicator reading as the cam reaches maximum lift.

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.

Do I need to degree My camshaft?

This is the only way you will know if the rise and fall of the pistons properly matches the opening and closing of the valves, so the engine will run properly. A few degrees of misalignment can affect the engine’s operation dramatically. always recommend that the camshaft’s position in the engine be degreed in.

How important is it to degree a camshaft?

The purpose of checking or degreeing-in the camshaft in the engine block is to determine whether or not the camshaft is installed in the correct relationship or phasing with the crankshaft. However, the most important step in phasing a camshaft is finding absolute T.D.C. of the #1 cylinder piston.

How do you identify an unknown camshaft?

How to Identify a Camshaft by NumberFind the model prefix. The model prefix is the first part of the camshaft number, and it describes the vehicle that the camshaft is meant for. … Find the profile or grind number. This number should be on your camshaft, followed by a number of degrees. … Find the exhaust number and add it to the end of the list of numbers.

How do I know what camshaft to buy?

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 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.

Can you degree a cam with the heads on?

In this case, we will degree the cam as part of the pre-assembly routine with the heads not installed. … If the heads are already installed on the engine, a piston stop that screws in through the spark plug hole can be used. Be aware that not all cylinder heads will allow a spark plug style piston stop to work.

How do you properly degree a camshaft?

Rotate the engine clockwise until the lifter is on the heel, or base circle of the cam lobe (minimum lift). Zero the dial indicator. 8 Rotate the engine in clockwise direction until a 0.050″ reading is reached. 9 Rotate the engine in clockwise direction until a 0.050″ reading is reached.

What do the numbers on camshaft mean?

The are two measurements, duration and valve lift. The duration of measured in degrees ex 278, 288 like you gave. This measures how long the valve will stay open. For example, 278 degrees of rotation of the roller the valve will be closed. The other 82 degrees of rotation is where the valve will be open.

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 do 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 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.

What gives a cam a lopey 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. Lope is a result of the intake and exhaust valves both being open at the same time. …

What is a Stage 3 cam?

The LS1 Stage 3 camshaft was designed for enthusiast who want to increase power while maintaining excellent drivability and manners. This cams can be used with stock torque converters, stock rear gears, stock intake manifold, stock exhaust manifolds etc.

How big of a cam can you put in a stock 350?

the cam can be as big as you want nearly but if it doesn’t match the CR, intake etc. it’s pointless and will run bad. if you want the most power get it to match what you have now. the 270h should have around 9.5 or so CR and they don’t make it solid that i know of.