It is activated by engine revs and by the centrifugal force generated through the weights and springs within the distributor. To give the burning process a head start, an ignition advance mechanism is provided within the distributor. If not, the burning process in the combustion chamber would take longer than the speeding piston would permit, resulting in an incomplete burn. TIMING ADVANCEAs engine rpm increases, it is necessary to advance the ignition timing. To verify that the harmonic balancer and the pointer are correctly aligned on a new or rebuilt engine, bring the number-one piston to TDC on the compression stroke and confirm that the indentation on the harmonic balancer and the pointer are in alignment on zero degrees. To adjust the initial timing, slightly loosen the bolt that secures the distributor to the engine, and slowly rotate the distributor body until the initial timing agrees with the appropriate figures mentioned above. Run the engine at idle, aim a timing light at the harmonic balancer, and note the initial timing of ignition to the number-one spark plug. To check initial timing, clean the TDC (top dead center) line or indentation on the harmonic balancer at the front of the engine and, if necessary, identify it with chalk or crayon to make it more visible. Typically, they recommend 10 to 12 degrees of initial timing when the duration of the camshaft is less than 220 degrees 0.050-inch of valve lift 14 to 16 degrees of initial timing with a camshaft duration of less than 240 degrees 0.050-inch and 18 to 20 degrees of initial timing when the camshaft duration is less than 260 degrees 0.050-inch of valve lift. catalog or on their Web site under the Demon Carburetor Guide. One of the best guides to determine the initial ignition timing of V-8 engines can be found in the Barry Grant Inc. Furthermore, in connection with JB Tools’ satisfaction guarantee, JB Tools matches the price and/or any promotion associated with its products.INITIAL TIMINGThe chief function of initial timing is to provide a clean idle and crisp throttle response. However, JB Tools’ customers can rest assured that JB Tools stands behind its Warranty Program and its Manufacturer Matching Policy,100% of the time. JB Tools provides this disclaimer to ensure there is no likelihood of confusion unduly influencing your decision to purchase this product, or any other, product from JB Tools, and to ensure there is no confusion as to the existence of any affiliation between JB Tools and the manufacturer of this product. By purchasing this product from JB Tools, the manufacturers’ warranty, if any, potentially associated with the product may not be honored by the manufacturer. By purchasing this product from JB Tools, purchasers may not be guaranteed any manufacturer-provided services offered by the manufacturer of this product (including any training or technical support that may otherwise be available). JB Tools Non-Affiliation Notice and Disclaimer: JB Tools holds itself out as neither the manufacturer, an affiliate of the manufacturer, or an “authorized” distributor of this product. In the event a JB Tools customer believes that a product purchased from JB Tools has a defective condition and/or malfunctioning issue, JB Tools’ customers can rest assured JB Tools will work with its customers to ensure issues are resolved in accordance with JB Tools’ Warranty Program, which you can access by clicking here. JB Tools’ commitment to 100% customer satisfaction is unparalleled, which is why JB Tools offers its customers a best-in-class Warranty Program to all of its customers on all products sold by JB Tools. JB Tools prides itself in being a trusted, internet-based retailer that its customers can rely on for quality products at reasonable prices. To ensure 100% customer satisfaction, JB Tools is committed to and strictly complies with its return policy, which offers replacement products to its customers (subject to product availability), or a full refund (less return shipping costs), at the customer’s option, and which you can access by clicking here.īecause JB Tools is an independent re-seller, JB Tools is able to offer the products it sells at the most competitive prices, resulting in substantial cost-savings passed directly to JB Tools’ customers. Because JB Tools only sells genuine and authentic products, JB Tools offers its customers a 100% satisfaction guarantee. JB Tools Customer Satisfaction Guarantee: Although JB tools is often not an “authorized” re-seller of all the products it sells and is often not affiliated with the manufacturers or brands of the products it sells, JB Tools stands behind all of the products it sells, because the products JB Tools sells are genuine and authentic.
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