[  Example:   20 BTDC and 40 ABDC ]        To find this midpoint, add the distance between 20 BTDC and 40 ABDC. Once you have accurately established TDC, you can move on to actually degreeing the camshaft. The advance recommended by the cam grinder is probably just an educated guess. We tried checking the cam at 0.015 inch to see how close we could get to the specs. The distance between 20 BTDC and TDC is 20 degrees. The simplest way to degree a camshaft is when the crankshaft assembly is easy to rotate. Continue rotating the engine past the point of maximum lift until the indicator reads .050 inch again. Or, you can purchase these tools already made for a reasonable price. But when we added our numbers: 39 + 74 + 180 = 293 degrees, something wasn't right. Moving the camshaft further ahead in normal camshaft rotation will advance the camshaft and moving the camshaft opposite normal camshaft rotation will retard the camshaft in relationship to the crankshaft. Get Your DegreeThe next step is reading cam lift with a dial indicator. Turn the engine by hand in the opposite direction until the piston comes up and stops on the piston stop again. SKU # 750906 $ 169. Crankshaft Socket, 1/2 in., Steel, Each. Make sure the pushrod is free to move up and down in the aluminum plate without binding or wobbling. The dial indicator will display the total camshaft lift, record this reading to compare with the camshaft specification sheet. 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. Accurately drill a hole in the aluminum plate large enough to insert a bolt through the plate into the block deck. Our cam for the fat Rat is a mechanical roller, but the procedure is always the same regardless of cam style. Web-Cam offers a complete cam degreeing kit, see below for part number information or call for more But we've seen some wheels marked at 0 to 360 degrees. While the camshaft is opening the intake valve, the piston is approaching TDC (start of an intake event). Install a pushrod into the camshaft’s # one cylinder intake lifter location. If the TDC position is not correct, nothing else you measure will be accurate. For our Rat, we used a dial indicator on a bridge, but it works the same way. 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. Count the number of camshaft gear teeth [ Example: 60 teeth ]. Finding TDCNo, we're not talking about The Discovery Channel-TDC stands for top dead center. Slowly and smoothly rotate the crankshaft in normal engine rotation until the dial indicator reads .100 inch of piston travel before TDC. If you bought them individually, you could get a 9-inch degree wheel, a dial indicator, and a magnetic base through Powerhouse for around $75. An alternative option is to use a multiple keyway crankshaft gear. But don't think that cam degreeing has anything to do with dialing in your adjustable cam gears to some magical, predetermined setting. It is essential at this point that you have some means of rotating the crank that will not interfere with the degree wheel. Example: 40  2 = 20. We double-checked our TDC and all the previous measurements, but the numbers came out the same. 8 Rotate the engine in clockwise direction until a 0.050" reading is reached. $41.68. Record the degree wheel pointer reading. Then rotate the engine the opposite direction until it hits the stop and record that number. Proform 16in Universal Camshaft Degree Wheel $ 169. Your recorded numbers will be different, but the math operations work the same way. Mount the degree wheel centered on the nose of the crankshaft so it clears all other engine components. Your information will be collected and used in accordance with our  Privacy Policy. Part Number: MOR-61755. SKU # 750979 $ 119. 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. A rule of thumb for valve/piston clearance is, .080 inch intake and .100 inch exhaust. 99. Moroso 62190 11" Degree Wheel 4.5 out of 5 stars 10. It is critical to piston and valve train life that adequate clearance is provided. 2. 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 . Rotate the crankshaft opposite normal rotation and then forward again to recheck your piston TDC dial indicator reading. Next, continue to rotate the crankshaft clockwise until the dial indicator reads 0.050 inch on the closing side of the intake lobe from max lift and record that data. 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). Do not place the tip of the dial indicator in the pushrod cup of the lifter to read lift. Powerhouse Products POW103050 - Powerhouse Products Crankshaft Turning Sockets. Copyright © 1996 by Quality Performance Products, Shipping Address: 3701 Downwind Dr. Marshfield, WI 54449 This can be accomplished by moving the camshaft with offset keys, offset bushings, or by moving a tooth on the cam gear. Using light thumb pressure on top of the piston to take up bearing clearance, rotate the crankshaft forward in normal rotation. Note the reading on the degree wheel and mark it; our reading was 152 degrees. Step1 The camshaft and timing tensioner have been installed. Add the two numbers and divide by two, which in this case will be 26 + 22 = 48 / 2 = 24 degrees. Accuracy counts, so be sure to take careful measurements and smoothly rotate the crankshaft to get exact dial indicator readings. 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. Part # 68786. Free In-Store or Curbside Pick Up. Comp's published spec for this cam is 40 I.O. 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. 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. locate a store. Find a bolt hole in the block deck close to the pushrod and measure the distance between the pushrod and the bolt hole. Rotate the crankshaft until the # one cylinder piston is very close to TDC (Top Dead Center). This example will give a crankshaft degree wheel pointer reading of 100 ATDC. With the lifter on the base circle, turn the crank clockwise until the dial indicator reads 0.015 inch and then record the number on the degree wheel. 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. It's also important to note that not all degree wheels are labeled the same way. You can't use a roller tappet on a flat-tappet cam nor can you use a flat-tappet lifter on a roller cam. 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. Begin by rotating the engine clockwise until the dial indicator reads max lift. Continue to turn the crank clockwise until you read 0.015 inch on the closing side and record that number. This instruction manual will show you how to find and adjust this relationship for the best performance results. Dividing this number by two (2) finds the midpoint. Example: 15 + 25 = 40, This is the number of crankshaft degrees between the two recorded example points. The exact midpoint or center-line of the intake camshaft lobe will be ½ of the distance between the two recorded degree wheel readings. SELECT STORE. Move or bump the degree wheel, and you have to re-establish TDC. Proform 9in Camshaft Degree Wheel Kit with Heads Off $ 119. The distance between BDC and 40 ABDC is 40 degrees. You can accomplish this with only the # one cylinder piston with rings and connecting rod installed. 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