What is lift and duration on a camshaft?

Duration is how long the valve is off its seat. It is listed in degrees of crankshaft rotation. When someone refers to a “big cam,” they mean it has longer duration, not higher Lift. Advertised Duration is the degrees of crankshaft rotation that the lifter is raised more than a predetermined amount.

What is the lift on a B303 cam?

B303 Cam Specs 050″. This B Cam also features a 0.480″ intake lift with 1.6 rockers. Requires upgraded valve springs and a high stall torque converter is recommended for automatic transmissions.

What is the advantage of a camshaft with more lift and 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 determines cam lope?

What determines cam lope? Lope is a result of the intake and exhaust valves both being open at the same time. 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.

How is total cam lift calculated?

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). Tip: Maximum valve lift can be calculated by multiplying the maximum lobe lift times the rocker ratio.

What happens when you increase the lift on a camshaft?

Lift is another matter entirely (are you getting tired of reading yet?). Increasing lift has exactly the same effect as increasing the cam’s duration, except that you are not actually altering the opening and closing points of the cam lobes.

Where can I get a Ford V6 camshaft?

Camshaft, Hydraulic Roller Tappet, Advertised Duration 265/273, Lift .500/.500, Ford, 3.8/4.2L V6, Each Part Number: CCA-44-702-9 More Detail… This part is normally shipped directly from the manufacturer / Supplier. Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees.

How big is a Ford 2.9L V6 engine?

The Ford Cologne 2.9L V6 is a 60° cast iron block V6 engine built by the Ford Motor Company in Cologne, Germany, hence the name. Over the years, the Cologne V6 was available with engine displacements of 1.8, 2.0, 2.3, 2.4, 2.6, 2.8, 2.9 and 4.0 litres.

What kind of power does a long duration camshaft have?

A long duration camshaft usually has a power band way up the RPM range (6,000+), and a race motor that sees frequent sustained high RPMs can really make a lot of power with that high VE. There is a tradeoff, however. A camshaft with a long duration doesn’t run well at all at idle or low RPMs.

How is the duration of a camshaft determined?

Cam Sizing Virtually every cam maker uses duration to rate camshafts. When someone talks about a “big” cam, they are referring to cams with longer duration. This keeps the valves open longer, increasing midrange and top-end power at the expense of low-end torque.

How does lift affect the size of a camshaft?

Lift and duration combined determine total open valve area—the space available for air and fuel to flow into and out of the combustion chamber. The more valve area open to flow, the more power an engine can theoretically make. The trick is to “size” a cam to optimize valvetrain events for your particular engine combination and vehicle.

What kind of camshaft do I need for a Ford FE engine?

Camshaft selection for the FE engine is similar to other cam-inblock pushrod engines. You need to decide exactly what you intend to do with the engine, what you are expecting out of it, what vehicle you are installing it in, and then have a “heart-to-heart” talk with your checkbook.

What is lift and duration on a camshaft?