![]() The valve lift and duration are controlled by the camshaft lobes’ precise size and shape, as described by the grind number.Įach number can be interpreted and signified differently. Grind NumberĪnother vital piece of information that helps you identify GM camshaft identification codes is the grind number. The initial group of letters or numbers in the identification number, known as the “model prefix,” identifies the engine family and camshaft.įor instance, a camshaft made for a small-block Chevy engine code has the model prefix “LT1”.īy knowing the model prefix, you can narrow your search for the precise camshafts made for your engine builders. For example, 93 – 95 models and 96 – 97 models have different model prefixes. The first component of a camshaft number is the model prefix, which varies by model. Model PrefixĮxamining the model prefix is another method of identifying GM camshaft identification numbers. It is a quick and simple technique to tell if a camshaft is from GM. The precise sort of camshaft you have can be identified by carefully inspecting the engine cam and noting the identifying number. They have a flat tappet cam with a 0.050-inch tappet lift. Two different kinds of cameras don’t use lenses you can tell them apart just by looking at them. This identification number is made up of letters and digits that describe the characteristics of the camshaft. Near the distributor drive gear, many GM camshafts have an identification number etched or engraved onto the camshaft. ![]() Inspecting the component with your eyes is the simplest and easiest approach to determine the GM camshaft identifying numbers. You can even use an analog system to decode these data and ensure you pick the appropriate part for your GM engine. The ideal GM cam identification numbers for your engine can be found in various ways, including visually analyzing the component and looking up the model prefix, grind number, and exhaust number. How to Identify GM Camshaft Identification Numbers? The size and shape of the custom-ground camshaft lobe determine the amount of lift and length of the valve activity. The camshaft’s lobes push against the valve lifters as it turns, causing the valves to open and close at just the right times. Typically, a timing chain links the custom 3-bolt camshaft to the crankshaft. They are in charge of letting fuel and air in and exhaust gases out.Ī timing chain or belt connects the engine’s crankshaft to the camshaft specs. How Do Camshafts Work?Ĭamshafts function by regulating how the block engine’s valves open and close. The factory cam’s form allows it to act on a valve or switch to the extent of its severity when the shaft is rotated. ![]() The stock cam lobe’s shape influences the average duration time and lift of the lobe separation angle.Ī simple rod or shaft with shaped lobes along it makes up a camshaft. The camshafts are linked to the crankshaft’s rotation by a timing belt to guarantee this timing.Īdditionally, a camshaft’s geometry is an important factor in affecting engine performance. ![]() It must be precisely timed to the spinning of the engine.Īny timing variation from the ideal range can negatively impact engine performance. Synchronicity And ShapeĪ camshaft’s synchronization is defined as the exact time and length of the valve operation. When upgrading your engine, you can ascertain detailed engine upgrade advice and the precise type of high-performance camshaft you require and make an informed selection by knowing the GM camshaft identification codes. GM offers a variety of camshaft types, including hydraulic, solid, and hydraulic roller camshafts. The camshaft in a GM engine chooses the best timing cover and length of the valves’ action, which impacts the engine’s overall performance. It regulates how the engine’s valves open and close.Īn internal combustion engine uses an earlier model camshaft, a cylindrical rod often constructed of metal, to control other engine parts. One crucial part of a crate engine is the camshaft. ![]()
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