"Scatter Pattern" cams were designed by David Vizard to work best with the pecularities of the A-Series' siamese intake ports. The 310 scatter pattern is the ultimate race cam. Needs fully prepared engine for good results - high CR, high flow head, exhaust manifold and system. 310 duration and .420 lift
Lobe center is 106 degrees.
The high performance camshaft has been specially cross-drilled for improved oil flow and longer life

Advancing the cam timing moves the valve opening and closing events earlier in the cycle. Since the relationship between the intake and exhaust lobes cannot be changed, advancing or retarding a cam affects both the intake and exhaust valve equally. Also, the most important thing advancing or retarding a camshaft affects for engine power is when it closes the intake valve. For example, if the camshaft is advanced, the intake valve closes sooner. This typically increases cranking compression on a high-duration race cam. The result is more torque and power in the lower rpm ranges. But as the rpms increase, the velocity of the air/fuel charge in the intake ports also increases dramatically and the early intake valve closing hurts power.

When used in Sprites, Midgets, and Morris Minors a slot drive oil pump is required.

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Many cam profiles have been tried over the years but the famous old "649" grind is still considered the best overall! It's a 300 degree duration cam with a valve lift of .470 when used with high lift rockers (.4" with stock)! This profile works great in everything from 948 to 1275cc motors. Todays standards would call this a mild race for a 1275cc, but a super cam for a 948cc. This is "slot drive".
Timing: Intake Opens 43°BTDC, Closes 64°ATDC, Exhaust Opens 61°BBDC, Closes 40°ATDC. Lift with std ratio rockers is .323", cold clearance .016".

When used in Sprites, Midgets, and Morris Minors a slot drive oil pump is required.

Have a Question or Comment of your own? Click here!

The high performance camshaft has been specially cross-drilled for improved oil flow and longer life.

When used in Sprites, Midgets, and Morris Minors a slot drive oil pump is required.

Have a Question or Comment of your own? Click here!

The high performance camshaft has been specially cross-drilled for improved oil flow and longer life.

When used in Sprites, Midgets, and Morris Minors a slot drive oil pump is required.

Have a Question or Comment of your own? Click here!