Camshaft choice requires careful considering and above board concern as to how the vehivle Testament be used afterward. Too much lift can cause interference between the piston and valve. Other important terms are lobe separation, also known as LCA (the distance in degrees that separates intake and exhaust cam lobes), and overlap (the amount of time in degrees when both the intake and exhaust valve are open). All play a part in how and where the engine makes its peak torque and horsepower.3.
Instructions
Evaluation and Selection
1. Dispose how the vehivle is currently configured. It's salient to diagnosticate the automobile's weight, rear axle ratio and transmission converter stall celerity. With favor to the engine, calculate or describe the compression ratio, cylinder mind and induction process airflow, and how restrictive the exhaust step is. Name the type of system the engine Testament peep during usual usage. These factors figure into the exact valve feature timing for a specific camshaft invent, and which camshafts Testament manage choicest. Whether the machine already has other performance modifications such as improved intake and exhaust systems or aftermarket cylinder heads, these Testament exchange the requirements of the camshaft. Provided changes to these components are to be trumped-up, pennies them headmost. This Testament narrow down choices and love in on a cam that Testament be much more suitable. Make the camshaft one of the last considerations until the car is set up for its intended function
2. Identify, learn and understand camshaft terminology and timing events and how the cam's action affects engine performance. If needed, find a trusted individual who understands this information. The most significant aspect of cam performance is duration, but the most potentially damaging factor is valve lift. Because camshaft changes are immensely enhanced with other modifications, it should be component of a combination of upgrades so the full combination results in the desired performance of the automobile. This is a Element where also can easily incline besides still. This affects driveability and reliability, and can yet damage parts.
Decide which type of cam follower (tappet) is to be used. Current camshafts are available in two forms, each having two types of lifters. The lifter types are either flat-tappet or roller tappets. Each is available with either a hydraulic or mechanical (solid) lash design. Hydraulic lifters are operated with zero valve lash; that is, there is no clearance between the valve tip and the valvetrain. A hydraulic plunger within the lifter automatically compensates for this tolerance. Solid lifters require periodic checking and maintenance and do not operate as quietly as hydraulic lifters.
4. Decide how the car will be driven. For instance, if your car will be driven on the street and cruise on the highway at lower RPMs, the cam needs to be designed to supply peak torque at that approximate level. Target the engine speed that the engine will be driven at almost all the time and modify the entire combination first so that it provides the best environment for the cam to function. If the engine's rotating assembly and valve train are reliably limited to a certain RPM, the camshaft should have a power band that is limited to about the same area.
5. Choose a camshaft manufacturer that you feel confident will accurately recommend and offer a design that is ideal for the application. Most camshaft companies have trained technicians available to reply questions and offer suggestions based on input from the car owner.
