Shop DEGREE CAMSHAFT
DEGREE IN 944 TURBO CAMSHAFTNote: This set-up process must be done using the LR solid lifter inspection port on #1 intake valve. You cannot accurately locate the dial indicator without this port to check the position.
Remove the power steering belt and radiator fans. Install LR Degree wheel and hub assembly. Slide the hub over the power steering pulley but do not tighten the Allen set screws yet. Mount a pointer to reference the TDC location on the degree wheel. (this can be as simple as a heavy coat hanger bolted to the engine as a pointer).
Bring #1 piston to TDC with dial indicator in spark plug hole, or with flywheel mark in inspection hole at the back of the engine. With #1 piston on TDC, rotate degree wheel and align with pointer so degree wheel reads ‘0’ degrees.
Remove the 2nd cam box cover plug and #1 intake valve inspection port plug. Set up dial indicator with ‘LR lifter foot’. Adjust depth of dial indicator so lifter foot rests on top of the #1 intake lifter, next to the cam lobe. Make sure the foot does not get under the cam lobe! Adjust the dial indicator to read ‘0’.
Using a breaker bar or torque wrench, and 24mm deep socket, rotate engine one revolution until you see the dial indicator begin to show valve lift. The longer the bar, the more accurately you can turn the engine over.
Slowly turn the engine until the dial indicator reads .050” lift. It can help to have a second person with you, one to watch the dial indicator and the other to watch the degree wheel. You will see that once you relax the breaker bar, the degree wheel will back up 2-3 degrees. Holding the tension against the cam belt, now read the degrees before TDC on the degree wheel. Turn the engine through it revolution and check this lift vs. crank position 2 or 3 times to make sure you are getting an accurate reading.
Different camshaft grinds have different set up specifications. Refer to your LR cam set up sheet to determine your cam’s number of degrees BTDC. For this example, we will use the WEB 274 cam profile. This cam has a set up dimension of 5 degrees BTDC.
If your degree wheel is not on the 5-degree BTDC mark, you will need to adjust the cam gear to correct the setting. For those using the LR adjustable cam gear, simply loosen the four bolts on the face of the cam gear. Now gently turn the engine while watching the alignment marks. Make small changes, one mark on the cam gear will make several degrees of change at the crank. Re-tighten the 4 cam gear bolts and recheck your cam position. Repeat the process until you get the correct relationship between the cam and crankshaft.