How do you degree a dual overhead camshaft?
On DOHC engine the lobe-separation angle is simply calculated by adding the intake centerline to the exhaust centerline and then dividing by two. In the case of this RB26DETT, the intake cam had an intake centerline of 110 degrees and an exhaust centerline of 117 degrees.
How is cam degree calculated?
D.C. To determine the amount the camshaft is advanced in crankshaft degrees, simply subtract the difference between the intake and exhaust Top Timing and divide by two. In this case 37° – 29° = 8° ÷ 2 = 4 crankshaft degrees of advance.
What is the best method to degree a camshaft?
Currently there are two popular methods for degreeing a cam: the centerline method, and the duration at . 050″lift method. We believe it is far better to degree the camshaft with either method than not to degree the cam at all; but of the two methods, the duration at . 050″ lift is much more accurate.
Do camshafts have to be degreed?
How “big” does the cam need to be before degreeing a cam really makes a difference? In a practical sense, size does matter. “Anything over 230 degrees duration at 0.050-inch tappet-lift on the intake side should probably be degree’d unless you know something about the piston valve reliefs,” maintains Godbold.
Is it necessary to degree a camshaft?
Pit Stop with Marlan Davis: Degreeing a custom cam ensures its maximum performance, helps prevent piston-to-valve contact, and protects against assembly error. The bigger the cam, the more important this is.
Should I degree My cam?
How do I test my cam centerline?
Intake Centerline Method Finding the centerline is easy. Rotate the engine clockwise until you find the maximum lobe lift, then zero the indicator. Now rotate backward about 0.100 to 0.150-inch to compensate for timing chain slack. Then rotate clockwise until you reach 0.050 inch.