Then you can position the spark plug wires with the correct firing order based on the distributor orientation. The distributor insertion coupled with crankshaft pulley timing mark setting for cylinder number one (on the compression stroke) will determine which distributor cap tower the rotor is pointing at to fire cylinder number one. The link below can provide you with some options and background information that you might consider.ĮLECTRONIC DISTRIBUTOR UPGRADE/REPLACEMENT OPTIONS The elimination of points and condenser and general upgrade to a modern breakerless electronic ignition system can provide you with an ignition system that is almost maintenance free. If you have the budget for it, you might consider switching to an electronic distributor or a Pertronix or Crane Cams electronic upgrade for your existing distributor, in addition to a correct set spark plug wires. In this picture, you can see (from left to right) the woodruff key, the distributor drive gear, the fuel pump push rod cam lobe, the main journal, and connecting rod journals 1 and 2. The pictures below will explain the variations found in pulley design over the various Corvair model years, and shows how the pulley or harmonic balancer establishes a known reference point for crankshaft and ignition system timing. This is because there is no way to predict how much life is left in the used component. If you ever need to replace a defective harmonic balancer, a new harmonic balancer should be purchased because the lifespan of the three-piece harmonic balancer is limited and purchasing a used, aging harmonic balancer may not be an economical choice. The key prevents relative rotation between the two parts, and ensures proper alignment with the crankshaft journal associated with the number one piston at Top Dead Center. The woodruff key is a machine element used to connect a rotating pulley or harmonic balancer to the crankshaft. If the slip check reference mark is not present, the timing mark on the outer ring must be in-line with the crankshaft woodruff key. If present and visible, the slip check reference mark should line up between the center hub and the outer ring, showing that there has been no slippage between the hub and the outer ring, which is held in place by a press-fit using a rubber component sandwiched between the two metal components. The harmonic balancer was intended to prolong the life of the crankshaft by reducing the possibility of stress fractures from crankshaft harmonics in the long stroke crankshaft. This would be at idle with the vacuum advance disconnected and plugged.Ī harmonic balancer was specified on all 164 CI engines from 1964 through 1969 (except for the 95 hp version). As shown in the tuneup chart below, the normal static timing at about 600-650 RPM idle is specified at 18°-20° BYDC.
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