VALVE TIMING

This is the correct valve timing for my race cams. A timing sheet is supplied with the cams but if it is lost or missplaced look no further.

Inlet valve: -

Inlet valve opens at approximately 55 degrees BTDC

Maximum lift 0.425 at 99 to 104 degrees ATDC

Exhaust valve: -

Exhaust valve closes at approximately 45 to 50 degrees ATDC

Maximum lift at 102 to 106 BTDC.

Helpfull Advice:-

When setting the valve timing it is most important that you set the inlet timing correctly before you start on the exhaust. The best method is to only fit one cam at a time. The most important part of the timing is the point that maximum lift is reached. Once you are confident that both cams are set correctly you can fit them both and turn the engine over very slowly by hand to check that both valves do not touch on the overlap. If you shine a flashlight down the inlet tract while turning the crankshaft you can look through the exhaust port and watch the valves pass each other. A minimum clearance of 0.040"is recomended! To check this you can make a checking gauge from a short piece of 1 mm wire (0.040") that can be fed down through the spark plug hole and passed between the valves.