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MS1-Extra Crane Optical Shutter
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Please Note:
All of these instructions / diagrams are to be used at your own risk, like most things there is more than one way to do the same thing, what we have tried to do is to offer a method that we have tested or that others have tested for us. No warranty expressed or implied. Use at your own risk. |
Starting can be improved for This Cylinder mode by using the distributor shutter position during cranking, rather than using the ECU calculation. To accomplish this the leading edge of the slot must pass the pickup at 60º to 90º BTDC (Trigger Angle for This Cylinder mode) and the trailing edge of the slot must pass the pickup at 10º (Return Trigger). This requires a slot width of approximatly 50º or more. For example; the slot on the shutter from Crane is 30º. By increasing the slot width the angle of the slot will also be increased. To maintain good running synchronization, material should only be removed at the trailing edge (the edge that will give a trigger during cranking).
The shutter shown has the slots increased to 0.16" to give approximately 50º at the crank between the leading edge and trailing edge. Shutter wheels of different diameter will require a different size slot to accomplish the same increase in angle or may have a different configuration.. To enable the cranking trigger for the trailing edge, set Cranking Timing to Trigger return. The timing may be implemented differently on your ignition.
