how to make a cam degree wheel

Having the crankshaft disconnected from the clutch is helpful. As soon as you have the skill, you will instantly become the neighborhood cam guru. There should be no question where it is pointing. Install a pushrod into the camshaft’s # one cylinder intake lifter location. 99. You want the camshaft closing reading at .050 inch before total lifter drop (the dial indicator will read .050 inch before zero). Either method is OK; use whichever is easier. Install height, coil bind, valve to piston, cam not ground correctly and I almost always want a different pushrod length. This is the number of crankshaft degrees between the two recorded example points. Carefully align the dial indicator so the pushrod is perfectly in line and free to rotate around the dial indicator plunger. You may have to readjust the degree wheel on the crank a few times. Exhaust valve/piston clearance will typically be the smallest before piston TDC. If the camshaft timing is changed, follow this guideline: advancing the camshaft center-line results in a power-band at a lower RPM, retarding the camshaft center-line results in a power-band at a higher RPM. I overlooked this step when I was building my motor (yes I'm a noob at this motor building stuff) and I just set the timing using the valve cover marks. Checking the opening and closing points at 0.050-inch tappet lift would be more accurate, where the lobe is moving a fewer number of degrees per 0.001-inch tappet lift. The wire pointer will be at 5 ATDC on the degree wheel. The distance between BDC and 40 ABDC is 40 degrees. The simplest way to degree a camshaft is when the crankshaft assembly is easy to rotate. SKU # 750979 $ 119. Adjust the pushrod hole diameter if necessary to eliminate binding. Many degree wheels are marked in 90 degree or 180 degree increments. If your application requires a different width power-band, you may need a different camshaft grind. My luck, something is always off! Now bolt a stationary pointer on the cylinder block (see... Mount a dial indicator securely to the cylinder block. All the work in degreeing a camshaft revolves around an absolutely accurate position of TDC on the degree wheel. [ Example: 15 BTDC ]  Continue in normal rotation another 20 crankshaft degrees (½ of the distance between the two example points). Part Number: TFS-90000-16W Not Yet Reviewed Part # 68786. Begin by rotating the engine clockwise until the dial indicator reads max lift. Move the degree wheel to read 24 degrees against … In our case, we were degreeing a Comp mechanical roller cam. JEGS 81622 Precision Cam Degree Wheel 4.6 out of 5 stars 33. Which choice works the best depends on how far the camshaft timing needs to change. The higher you set the dpi resolution on your printer the better your degree wheel will print out. Install the cam gear(s), idler gear(s), crankshaft gear(s), etc. This instruction manual will show you how to find and adjust this relationship for the best performance results. Your recorded numbers will be different, but the math operations work the same way. Now we need to talk about the timing card. Install the camshaft and the # one cylinder lifters into the block with light oil on the bearings, lifters and # one cylinder camshaft lobes. Rotate the crankshaft assembly in normal rotation to find the camshaft base circle. Example: If you advance the camshaft gear four (4) degrees, the camshaft center-line timing will advance four (4) degrees. Downloadable Degree Wheel. Make sure your degree wheel and pointer is secure and will not move during the entire process. Divide 360 (number of degrees in a circle) by the tooth count of the camshaft gear. A good old fashioned coat hanger, looped around one of the timing cover bolts and sharpened to a point on the opposite end works perfectly. To find an approximate piston TDC, set the dial indicator on top of the block so the dial indicator plunger is perpendicular to the piston top. Slowly and smoothly rotate the crankshaft in normal engine rotation until the dial indicator reads .100 inch of piston travel before TDC. I found that a CD is the same size as the degree wheel, just cut the center of the disc out and tape/glue the paper one on it so you have the degrees! Copyright © 1996 by Quality Performance Products, Shipping Address: 3701 Downwind Dr. Marshfield, WI 54449 There is nothing magical about the numbers on the cam card or how they were determined. Setting the camshaft intake center-line to within one (1) degree accuracy will give the best engine performance based on the information given when ordering a camshaft. But we've seen some wheels marked at 0 to 360 degrees. A rule of thumb for valve/piston clearance is, .080 inch intake and .100 inch exhaust. The numbers given here are only examples. The exact midpoint or center-line of the intake camshaft lobe will be ½ of the distance between the two recorded degree wheel readings. With our big-block Chevy at 0.050 inch on the opening side of the lobe from max lift we recorded 62 degrees after top dead center (ATDC) and then 151 degrees ATDC at 0.050 inch from max lift on the closing side. Turn the engine by hand in the opposite direction until the piston comes up and stops on the piston stop again. You'll need adjustable cam gears to do all of this as well as a degree wheel, a dial indicator, and some basic hand tools. Get Your DegreeThe next step is reading cam lift with a dial indicator. Once you have accurately established TDC, you can move on to actually degreeing the camshaft. Make sure the dial indicator travels roughly the same angle as the lifter. For more information on the effects of camshaft timing, valve lift and duration, lobe separation and overlap, rocker arm ratios and valve lashes, consult publications available from camshaft vendors. Accurately drill a hole in the aluminum plate large enough to insert a bolt through the plate into the block deck. track your order. You back the engine up to 0.100 inch on the dial indicator before taking the reading at 0.050 on the opening side of the lobe because traveling past the data point and then turning the engine clockwise to approach the 0.050-inch data point removes any slack that may be present in the timing chain that resulted from turning the engine backward. Simply right click on the above degree wheel and save a copy. If nothing else, a degree wheel looks good in your toolbox. Step1 The camshaft and timing tensioner have been installed. In our case: 62 + 151 = 213 / 2 = 106.5 degrees ATDC. Re-tighten the bolt holding the degree wheel to the crankshaft. Bolt the aluminum plate pushrod guide plate to the block with the pushrod installed in the camshaft’s # one cylinder intake lifter. I suggest using the largest diameter degree wheel you can find and a razor blade works great as a pointer. It is essential at this point that you have some means of rotating the crank that will not interfere with the degree wheel. Rotate the crankshaft opposite normal rotation and then forward again to recheck your piston TDC dial indicator reading. The intake valve/piston clearance will typically be the smallest after piston TDC. Now turn the crank about 50 degrees counterclockwise and mount your piston stop. Example: If you advance the crankshaft gear four (4) degrees, the camshaft center-line timing to the crankshaft will advance only two (2) degrees. Repeat turning the crank back and forth until the degree wheel reads the same measurement on both sides of “0” at the pointer. I don't know if anyones tried this but I printed out the free degree wheel on here, it works good but its paper so I came up with this idea. We added a few other handy tools to our tool list that are great to have, such as a cam handle for installing camshafts. Proform 16in Universal Camshaft Degree Wheel $ 169. You will use the aluminum stock to make a pushrod guide, if required. The lifter cup radius offers no flat area for repeatability. The valve to piston clearance is an important issue when installing a performance camshaft. Then rotate the engine the opposite direction until it hits the stop and record that number. This was true with our cam for the intake-closing numbers. NOTE: When degreeing a cam, remember to look at the degree wheel as a full 360 degrees no matter how the degree wheel you’re using is marked. For a piston stop, merely rotate the engine clockwise until the piston contacts the stop and record the number on the degree wheel. [ Example:  15  BTDC and 25 ATDC ]  To find this midpoint, add the distance between 15  BTDC and 25 ATDC. Est. Cam Degree Wheel Printable via. Because these numbers are close to the base circle, it's difficult to create accurate measurements. Free In-Store or Curbside Pick Up. Add a crank nut to turn the engine over, and you're in with everything you need for less than $100. The dial indicator will display the total camshaft lift, record this reading to compare with the camshaft specification sheet. Without rotating or moving the crankshaft, loosen up the bolt holding the degree wheel and rotate the degree wheel until the wire pointer points precisely at the TDC mark. And that's not all bad. We didn't include the price of a piston stop because for jobs where the heads are off the engine, you can make one out of a steel plate with a couple of holes drilled. Look at the degree wheel and write down the number of degrees shown by the pointer. When you have both sides of “0” at the same measurement, you will know your degree wheel is in perfect timing with your crank and pointer. The only difficulty with the budget degree wheel is that it's designed to be used with the professional crankshaft turn socket, which is a great tool that only costs $11 more than the crank nut. In the end, there are a couple of ways to degree a cam. If you overshoot your intended dial indicator reading, back up and carefully approach the numbers again. Pointer; A pointer can be purchased or easily fabricated. Degree Cam using the #1 Cylinder Accurately locate TDC of #1 piston. If the TDC position is not correct, nothing else you measure will be accurate. Continue in normal crankshaft rotation an additional 120 degrees (½ of the distance between the two example points). This instruction manual is only a guideline. An alternative option is to use a multiple keyway crankshaft gear. Comp's published spec for this cam is 40 I.O. Dividing this number by two (2) finds the midpoint. Go back to the degree wheel and write down the degrees it now reads. You can't use a roller tappet on a flat-tappet cam nor can you use a flat-tappet lifter on a roller cam. Resume crankshaft rotation until the lifter is starting to drop. Comp's intake-closing spec is 72 after bottom dead center (ABDC), while we measured 74 degrees. Adjusting the intake and exhaust cam timing allows the builder to move the torque curve to increase peak torque or peak horsepower. Delivery: Jan 22-25. Only 5 left in stock (more on the way). Its purpose is to help the installer determine the relationship between camshaft and crankshaft position. If the heads are bolted on the engine, you can use a pushrod to move the dial indicator. To find the exact TDC location, rotate the crankshaft in reverse of normal rotation until the dial indicator drops about .200 inch of travel. The point of either crank tool is the ability to rotate the engine in either direction without disturbing the position of the degree wheel. You can sit down with a degree wheel and dial indicator and determine everything you need to know to set up your camshaft (click on photo to enlarge). To do this, you need a procedure to measure camshaft lobe lift. Rotate the crankshaft until the # one cylinder piston is very close to … Est. Find a bolt hole in the block deck close to the pushrod and measure the distance between the pushrod and the bolt hole. Dividing this number by two (2) finds the midpoint. 1 piston and rod in place in the engine, the first thing to do is mount the crank nut on the crank snout, install the degree wheel, and position a pointer so it's very close to the degree wheel and lines up directly over an individual timing mark. A four-cycle engine’s components work together in a very precise relationship with each other. Repeat the camshaft center-line operation to confirm the accuracy of your measurements. 1 piston is close to TDC. 99. JEGS Precision Cam Degree Wheel | 11” Diameter | Made in USA | 3/4 “ Center Hole | Includes Three Bushings and One Steel Washer 4.6 out of 5 stars 34 $18.53 $ 18 . Continue rotation until the piston reaches the end of  travel at the top of the block. It should read the same number. Add these two readings together and divide the answer by two. Part Number: MOR-61755. Install the dial indicator with the indicator plunger parallel with and straight into the center of the pushrod end. + intake closing (I.C.) Record the degree wheel pointer reading. Next, you'll need a tappet of the same style as the cam. Rotate the degree wheel on the crankshaft nose until the TDC marking is near the top in a position easy to read. You can accomplish this with only the # one cylinder piston with rings and connecting rod installed. The essentials are a degree wheel, a magnetic base and dial indicator, a pointer, a piston stop, and a secure way to rotate the engine. This is the example’s true TDC. This can be accomplished by moving the camshaft with offset keys, offset bushings, or by moving a tooth on the cam gear. 9 Rotate the engine in clockwise direction until a 0.050" reading is reached. Our cam for the fat Rat is a mechanical roller, but the procedure is always the same regardless of cam style. Comp's spec is 106 degrees intake centerline, and we measured 106.5 degrees. We need a magnetic base and dial indicator to read the cam lobe lift, while the crank nut is necessary to turn the engine over both forward and backward without touching the degree wheel. If you move only the crankshaft gear, the change to the camshaft center-line timing will be ½ of the change in degrees of the crankshaft gear (remember the camshaft runs at ½ crankshaft speed). The following pushrod guide fabrication is used primarily for inline engines, but can be used for others if the camshaft lifters are inaccessible to the dial indicator. This just has to be close. To start, we will mount the degree wheel on the crankshaft with the crank snout mount along with a homemade pointer. Crankshaft Socket, 1/2 in., Steel, Each. You may need to correct the camshaft intake center-line from the measured point to the specification given on your camshaft information sheet. FINDING T.D.C. Moroso 62191 18" Degree Wheel 4.9 out of 5 stars 48. $18.35. This is the approximate TDC setting. Is it possible to use a degree wheel to set cam timing with the motor in the car? The installer accepts all responsibility for the camshaft installation and accuracy of degreeing the camshaft center-line to the crankshaft. Record the degree wheel pointer reading. This will ensure that the measurements reflect what the engine components are actually doing. The next step in this process is the camshaft timing. Sometimes you have to count backward from 180 to get the numbers to come out correctly. That procedure is detailed in the "Intake-Centerline Method" sidebar. 'The biggest challenge to degreeing a camshaft is convincing yourself to do the work instead of just lining up the dots on the cam and crank gears and calling it a day. The crank can be rotated from either the front or the flywheel end. Proform 9in Degree Camshaft Wheel Kit $ 111. These are great time-savers if you plan on building lots of engines. 8 Rotate the engine in clockwise direction until a 0.050" reading is reached. Install the camshaft to the specifications (as close as possible) given on your camshaft information sheet. Comp doesn't list its numbers at 0.050, so we had to find another way. Snug tight the bolt holding the degree wheel to the crankshaft. 99. to line up the camshaft and crankshaft timing marks. If you move only the camshaft gear, the change to the camshaft center-line timing will be equal to the change in degrees of the camshaft gear. Slowly rotate the engine clockwise until the dial indicator reads 0.050 inch from max lift and record the number on the degree wheel. 1- Large degree wheel   8″ to a 10″ diameter, 1- Adjustable magnetic base with a 1 inch travel dial indicator, 1 – Short length of wire to bend into a pointer  (Coat hanger or electric fence wire), 1 – 1/4 x 2 x 6 Aluminum plate to make a pushrod guide. Delivery: Jan 12-13. 99. Degree wheel; Degree wheels are easy to find. SELECT STORE. There's a quick equation for determining lobe duration: Intake opening (I.O.) By clicking Sign Up, you agree to the  Terms of Use. Rotate the crankshaft until the # one cylinder piston is very close to TDC (Top Dead Center). Continue rotating the engine past the point of maximum lift until the indicator reads .050 inch again. Make sure the timing marks on both the flywheel and cam gear are aligned as per the workshop manual Step 2 For example, we have our cam and it suggests we install the cam on 105 degree exhaust centrelines. The distance between TDC and BDC is 180 degrees (the number of degrees in half a circle). Add the two numbers and divide by two, which in this case will be 26 + 22 = 48 / 2 = 24 degrees. But don't think that cam degreeing has anything to do with dialing in your adjustable cam gears to some magical, predetermined setting. The distance between your previously recorded measurements will give the camshaft lobe duration at .050 lifter rise. For a smaller degree wheel, use a CD to stick the printed template to. [ Example: 360  60 = 6 degrees ]  The result from the division will be the number of degrees change in camshaft timing by moving one tooth on the camshaft gear. This told us that despite the numbers being off slightly at 0.015, the cam is installed correctly. The distance between 20 BTDC and TDC is 20 degrees. This first step is the most important. 2. This eliminates visual errors. The basic tools required are a degree wheel, a stable pointer that can be mounted to the engine, a dial indicator with at least one inch of travel in .001" increments, a stand that mounts it to the engine, and a positive stop device to locate TDC. We tried checking the cam at 0.015 inch to see how close we could get to the specs. Proform 9in Camshaft Degree Wheel Kit with Heads Off $ 119. Adjust the degree wheel to indicate TDC. Zero the dial indicator and rotate the engine counterclockwise until the dial indicator reads roughly 0.100 inch down from max lift. Home Delivery. Layout this measured distance on the aluminum plate from the previously drilled pushrod hole. Unfortunately, Comp only lists its opening and closing points at a 0.015-inch checking height. Email. We double-checked our TDC and all the previous measurements, but the numbers came out the same. As an option, realign the pointer to point precisely at the degree wheel TDC mark. But when we added our numbers: 39 + 74 + 180 = 293 degrees, something wasn't right. Record the degree wheel pointer reading. to line up the camshaft and crankshaft timing marks. With the cam, crank, timing set, and No. First, you'll need to position the magnetic base to the block and then mount the dial indicator. Degree Wheel Printable via. While the camshaft is opening the intake valve, the piston is approaching TDC (start of an intake event). Web-Cam offers a complete cam degreeing kit, see below for part number information or call for more SKU # 750906 $ 169. [ For example: crankshaft to a connecting rod; crankshaft/connecting rod to a  piston; valves to a camshaft ]  One of the most critical relationships in an engine is the camshaft to piston/connecting rod/crankshaft timing. This is a full 7" diameter degree wheel. + 180 = 292 degrees at 0.015-inch checking height. The distance between TDC and 25 ATDC is 25 degrees. ADD TO CART. This is the camshaft’s intake lobe opening ramp. Set the dial indicator needle to zero. This should be checked by the individual assembling the engine. ADD TO CART. Your information will be collected and used in accordance with our  Privacy Policy. Move or bump the degree wheel, and you have to re-establish TDC. + 72 I.C. Once the dial indicator is set, run through the entire lift curve several times to ensure it always returns to zero. It is critical to piston and valve train life that adequate clearance is provided. For degreeing with the heads on, you can make a piston stop out of an old spark plug. Make sure enough dial indicator plunger travel is remaining for the piston to travel up slightly, but more importantly for the dial indicator plunger to follow the piston down approximately 1/4 inch. This is why you don't turn the engine counterclockwise to 0.050, but rather go past it and then turn clockwise up to the first checking point. Estimated Ship Date: Today. Example: 15 + 25 = 40, This is the number of crankshaft degrees between the two recorded example points. Repeat the TDC operation to confirm the accuracy of your measurements. Using light thumb pressure on top of the piston to take up bearing clearance, rotate the crankshaft forward in normal rotation. Example: 25 ATDC (After Top Dead Center), The exact point of piston TDC will be ½ of the distance between the two recorded points. The numbers given here are only examples. Adjust the pointer wire so it points to the degree wheel at the TDC mark. Does your daily driver need the cam degreed? Next, rotate the crank until the No. Advancing the camshaft intake lobe center-line will open the intake valve earlier, relative to the piston position, and will advance the exhaust lobe center-line The lobe separation (number of camshaft degrees between intake and exhaust center-lines) is a fixed parameter. Note the reading on the degree wheel and mark it; our reading was 152 degrees. Standard Delivery. Adjust the tappets to the clearances recommended by the cam manufacturer. Count the number of camshaft gear teeth [ Example: 60 teeth ]. Standard Delivery. 53 Zero the dial indicator. Home Delivery. Accuracy counts, so be sure to take careful measurements and smoothly rotate the crankshaft to get exact dial indicator readings. The procedure for calculating the camshaft timing change by moving a tooth on the camshaft gear follows: 1. Install the cam gear (s), idler gear (s), crankshaft gear (s), etc. Next, we performed the intake-centerline method of checking the cam's position and found it to be within 11/42 degree of right where it should be. What you want to find is the precise midpoint or center-line of the # one cylinder intake lobe and where this center-line is in relationship to the crankshaft and piston TDC. This is important for the accuracy of your test. Make sure the pushrod is free to move up and down in the aluminum plate without binding or wobbling. Make sure you understand the resulting effect before making any camshaft timing changes. If you overshoot your intended dial indicator reading, back up and carefully approach the numbers again. Many degree wheels are marked. Set intake and exhaust cam timing accuracy on your motorcycle, ATV or UTV with a Hotcams Cam Degree Kit. Finding TDCNo, we're not talking about The Discovery Channel-TDC stands for top dead center. $74.99. Rotate the crankshaft until you get number one piston as close as possible to TDC. Camshaft Degreeing and Measuring Tools, Moroso, 11 inch Degree Wheel, Moroso, 18 inch Pro Series Degree Wheel, Proform, Universal Degree Wheel Kit, Comp Cams, Crankshaft Socket for Degree … You will start on the base circle of the lobe where there is no lift. we're hiring! 99. Do not place the tip of the dial indicator in the pushrod cup of the lifter to read lift. The advance recommended by the cam grinder is probably just an educated guess. It's also important to note that not all degree wheels are labeled the same way. Instead, use the edge of the lifter or build a dedicated lifter with a flat that will accurately locate the dial-indicator plunger. It's a small point, but accuracy is our goal. 99. Add the two numbers and divide by two, which in this case will be 26 + 22 = 48 / 2 = 24 degrees. The camshaft duration numbers always refer to degrees of crankshaft rotation. Bend the pointer wire and fasten it to the block. Add up all the distances in order: Example:  20 + 180 + 40 = 240 degrees. This is the camshaft’s intake lobe closing ramp. The Comp Cams timing card supplied with our cam calls for an intake centerline of 106 ATDC, so we're within 11/42 degree of dead on. Align the pointer so it points clearly and squarely at the degree wheel TDC mark.

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