JP Performance marks all crank sprockets and crank gears with the appropriate
advance, retard and standard timing marks (i.e +2, +4, +6, +8, -2, -4,
-6, -8 and 0). This helps when the timing has to be changed at a later
Why advance your timing?
Advancing your timing is useful when you are after more low down torque.
This will give better "off the line" acceleration, but is at the expense
of top end speed. Advancing the timing is good if you are towing a trailer,
boat or caravan on a regular basis.
Why retard your timing?
Retarding your timing does the opposite of advancing (of course!). Retarding
will give greater top end speed, but less low down torque. It is good for
vehicles that are regularly travelling in higher gears, such as highway
It is advisable when installing a new timing chain or gear set to use
a degree wheel to dial-in the camshaft. To do this use the JP Performance
Degree Wheel (JP 5720) which includes instructions on the face.