The Adjustable Camshaft Sprocket Set, Intake Only includes the following:
2 modified sprockets that have integral adjustment wheels (2 intake) to allow a total of 10 camshaft degrees of intake cam (and entire rotating assembly) timing adjustment
- The intake cam sprockets have an adjustable centre for infinite adjustment of 5 cam degrees advance to 5 cam degrees retard, with an indicator.
NOTE: Most people speak of camshaft specs in crankshaft degrees, which are 2x the camshaft degrees. Thus we offer 20 total crankshaft degrees of intake cam adjustment (from 10 degrees advance to 10 degrees retard).
These camshaft sprockets have not yet been properly dyno tested ... we have some results, but not at all settings, and have not properly reviewed them yet. For example, Don Donelson found that they picked up mid range with his Stage IV car, with little loss in upper end, by advancing the rotating assembly by 3 cam degrees via the intake sprockets.
There is no guarantee of any power increase. Under some settings, power will actually be lost. They do, however, enable you to play around with the settings to enable adjustments to the power curve.
Please read about Sprocket Cores