camshaft application chart notes: comments mech/ dur @ .050” adv. In the image on the left is a hydraulic roller cam, the rounded lobes are readily appearant compared to the flat tappet cam to the right of it. Camshaft ID, Crankshaft ID Help needed. (It is why a camshaft's RPM Range is based on its duration.) There are typically 2 duration measurements given for profiles, advertised and 0.050”. This is the best way to get the most out of your engine and is well worth the money. The 7661-11 is a serial number specific to that camshaft only. Also at the rear journal were GO8 with the letter M inside the O. Ted went on to give the spec's for the Melling RYB-10 camshaft. I have a "CWC" stamping.... Camshaft Spec Card Search - … Even though the stock cam has a duration of about 250 degrees, a mild aftermarket cam like the Engle 100 (duration 270 degrees) will still move the point of maximum torque/horsepower further up the RPM range. The main focus of this article will be on a conventional OHV (overhead valve), cam-in-block engine configuration using two valves per cylinder, as shown above. On one of the cam ends it reads Iskenderian B7 09 DS E4. duration is 274 degrees, H is for hydraulic, an 06 tells you the lobe separation angle of 106. Gene Stoehr. There is one lobe for every valve in the engine with the intake and exhaust lobes each having its own design. i pulled apart an a14 bottom end for rebuild and noticed it had been tampered with before. Part number is 100172 which really tells you nothing. Optional camshaft number requirements are listed at the link in Resources. Depending on the model of vehicle, you may also need an exhaust grind number, which will be stamped onto your car's exhaust inlet, and it will follow the same form as the numbers on the camshaft. If the intake valve opens AFTER TDC, use a negative value. Find the model prefix. Cam timing at .050" is: intake opens 1 degree BTDC, intake closes 41 degrees ABDC, exhaust opens 50 degrees BBDC, exhaust closes 8 degrees BTDC. Typically camshaft manufacturers list this measurement by multiplying the cam lobe lift by the stock rocker arm ratio, usually 1.5:1. A camshaft with 106 degree lobe separation angle will have more overlap than one with 112 degrees. Mechanics consider a small amount of end play acceptable, since it permits the camshaft to shift in relation to temperature gain. A number of factors influence valve lift. We are looking at how many crankshaft degrees the valve is open. Hydraulic flat tappet, solid flat tappet, hydraulic roller and solid roller. A flat tappet cam will be much more pointed, similar to the small end of an egg. If you want to be a real baller get a custom grind cam built specifically for your engine combination and intended purpose. Camshafts are a subject that all car guys love to talk about, and those who listen tend to roll their eyes at the staggering number of terms and numbers. Rocker arm design also plays a part in the total lift based on its ratio. It also allows more exhaust to escape. Camshaft, in internal-combustion engines, rotating shaft with attached disks of irregular shape (the cams), which actuate the intake and exhaust valves of the cylinders. However, if you break the number down one piece at a time, it becomes easier to identify. The lifters and camshaft lobe wear together to make a perfect pair. Roller: 350 ZZZ through ZZ2 crate motors Roller camshafts, on the other hand, must take end play into account. My numbers were YB1 behind the front journal and RYB 10 stamped at the rear journal. The most extreme camshafts come in the shape of those featured on the Bugatti Veyron. Lobe Shape. Although it’s nothing more than a stick of steel with bumps (lobes) on it, the camshaft is one of most important pieces of the 4 stroke engine. Warning: When removing the camshaft, you want to make sure that it does not fall, as it can damage the bearings in the cylinder head. Like the Crane 274HO6-tells you the adv. A low duration camshaft works best at lower RPMs. It has a number stamped in the end: 869340. Camshaft Basics - What do those number mean? The hydraulic lifters on the other hand are more of a set it and forget it option but you will be limited in the amount of rpm they can handle. Long duration camshafts also create more Valve Overlap. The ID number will consist of either eight or nine digits; the last four numbers identify the cam and its specific application. We all know that there are 360 degrees in a circle but you have to understand that the crankshaft rotates at half the speed of the crankshaft. Take the 899C and add it to the model prefix. Lift, duration, Lobe separation angle and overlap, what you need to know before choosing a camshaft. Copyright 2021 Leaf Group Ltd. / Leaf Group Media. … The ID number will consist of either eight or nine digits; the last four numbers identify the cam and its specific application. Cam companies use the intake centerline of cylinder No. Match the number to a Chevrolet camshaft part number listing. If you need a new camshaft, it can be a bit confusing to put together the identification number of the camshaft you need for your car. As I said before it’s extremely important to match the cam to the engine and its intended purpose. This is especially true with flat tappet lifters. Thanks author: message: admin. I Can't seem to find enough numbers to make a complete ID number. Locate the ID number on the camshaft. Add the numbers together. The camshaft consists of a cylindrical rod running the length of the cylinder bank with a number of cams (discs with protruding cam lobes) along its length, one for each valve. On this page, you can find out how a fault on the camshaft sensor can manifest itself, and which steps should be taken during troubleshooting. Camshaft Part Number Search . However, at low rpm, the open valves reduce the pumping pressure of the piston. For example, you might have a camshaft stamped with the numbers 899C, followed by various numbers with degrees. COMP offers this as a service to anyone who is looking for a custom combination of specs that are not listed as an “on-the-shelf” cam. Cwc Camshaft Markings . This creates more power. Effect Of Changes In Cam Timing And Lobe Separation Angle The following tables illustrate how variations in lobe separation angle and cam timing will effect the behavior of the engine in which the camshaft is installed. As mentioned before the intake and exhaust lobes each have their own design and therefore may be different. My handle is Rudder2fly. A 110-degree lobe separation angle means the peak intake and exhaust opening points (max lift) are 110 degrees apart. These are called dual profile camshafts (sometimes dual grind). More bottom end, less top end. Ted Eaton responded and thought my cam was a Melling Cam. This also refers to the term overlap which is the amount of time both the intake and exhaust valves on one cylinder are open at the same time. For instance, the number for a Toyota 3SGE would be CS 3SGE. He holds a bachelor's degree in criminal justice from Indiana University, and resides in Northwest Indiana. How To Identify Gm Camshafts . Some actually give you some cam data, others do not make too much sense. It is typically located in the center of the cam between the lobes. When the lobe reaches its highest displacement … Old Lunati Camshaft Part Numbers. valve lift lobe sep power lifter below part # hyd stage int exh int exh int exh int exh range idle part# part # american motors v8, 1966-92 290, 304, 343, 360, 390, 401 c.i. Camshaft basics explained. Too much lift and you can make contact with the pistons not only ruining parts but your day as well. Roller cams are more expensive, but also more reliable. Posted on: 2007/9/26 13:50 _____ CA18DET 1200 lagwagon retired LAG510 - SR20DET 1600 sedan … If you reuse lifters you will quickly destroy the lifters, camshaft lobes or both. The basic action of a cam. The model prefix is the first part of the camshaft number, and it describes the vehicle that the camshaft is meant for. Of course all of the engine parts must work together but we typically design the camshaft for a particular engine. How To Identify Camshaft Numbers A cam lobe forces a valve open by pressing on the valve, or on some intermediate mechanism, as it rotates. Advertised duration on the other hand is not standardized. Randomly choosing a camshaft profile usually has lackluster results without lots of research and practice. Find the profile or grind number. Find the exhaust number and add it to the end of the list of numbers. After finding camshafts in the Cam Length column, determine camshaft head style, using the Head Styles chart and head width dimensions. of lift. In addition, a small amount of end play allows the cams to better resist wear by shifting their position in response to especially hard contact. The flat tappet lifters are flat on the bottom and glides on an oil film on the lobes. I pulled a new looking camshaft from my 400 SBC. At high rpm, this helps … Duration is measured in degrees and refers to how long the valve event (valve open) lasts. Lobe separation angle is the measurement in degrees between the intake and exhaust lobe centerlines. There is a limit to the amount of air an engine can move and opening the valve further than needed becomes counterproductive. Because you need at least one camshaft per cylinder bank, inline engines need as few as a single camshaft, whereas a V arrangement would require at least two. The shape, size and placement of these lobes control the engines ability to function efficiently in turn creating more power. 1 to establish exactly where the camshaft is in relation to the rest of the engine. Do not rotate camshaft or crankshaft with timing belt removed and cylinder head fitted. The lobes machined into the camshaft are the magic sauce that can make or break an engine. 4. 3. Any help is appreciated. This number should be on your camshaft, followed by a number of degrees. Be aware that the more you open the valve the closer it is to the piston. There’s lift and duration, overlap and lobe centers, lobe separation angles and so on, and all of them have numbers attached. In the image on the left is a hydraulic roller cam, the rounded lobes are readily appearant compared to the flat tappet cam to the right of it. Camshaft designs are called profiles and today we are going to look at what makes a profile. These are called dual profile camshafts (sometimes dual grind). Number Manufacturer Years Cid Lift Lsa Icl Duration Lifter Notes ; 1: 10134334: Chevrolet: 350: 480″/.480″ 114 @ 0.050″ 235/235: Hyd. This can be altered by degreeing the cam after it's been installed in the engine. Advantages in Numbers. There are typically 2 duration measurements given for profiles, advertised and 0.050”. Without a properly designed camshaft, the air pump we call an engine would be useless. There can be a varying number of camshafts in an engine, depending on its cylinder arrangement and valve operation. The roller cam will have much more rounded lobes, like the big end of an egg. Re: Where can i find camshaft Id Numbers . Valve lift is computed for stock rockerarm ratio (1.73:1 for 400, 351-C & Boss 302: 1.60:1 for all others) Source of information: Ford Performance by Pat Ganahl, an excellent reference book on Ford performance engines dur. ... the camshaft had some weird numbers that I can not identify. This number should be on your camshaft, followed by a number of degrees. some of the nuts that held the conrod caps on were rounded and the pistons looked possibly not the originals... anyway the cam has "169" stamped on the face under the cam sprocket. It’s okay to reach out to the camshaft manufacturers for advice (you’re not asking for directions). 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