![]() ![]() Most engines use a timing tab that is welded or bolted to the front timing chain cover. Upscale versions will also display battery voltage.īefore we get into how to use a dial-back light, we should run through why they are needed in the first place. The more sophisticated electronic dial-back lights offer aĭigital screen usually at the back of the gun that will display rpm and theĪmount of timing delayed. Originalĭial-back lights used a simple dial with a timing scale. Onset of the spark based on how much delay is dialed in on the light. These timing lights use electronics to delay the The next level up from a basic timing light is what isĬalled a dial-back light. The most common form of timing lights powered by a simple pair of clamps hooked to a 12-volt battery source. These lights use batteries in the body of the light that amplifies the signal from the inductive pickup on the plug wire. The simplest timing lights are self-powered. ![]() Timing lights can be described in a number of ways, so let’s go over that with a short description of each. All guns today use an inductive pickup that surrounds the plug wire and picks up the electro-magnetic energy that surrounds the plug as the voltage passes through the plug wire. Your grandfather might have one of those lying around his shop. In the old days, all timing lights used a small spring that fit between the spark plug and the plug wire that was connected by a clamp to send a high-voltage trigger to the light. ![]() That stroboscopic flash is intended to ‘freeze’ the location of the timing mark on the harmonic balancer relative to a timing tab usually attached to the engine’s front timing chain cover. A simple timing light is really nothing more than a stroboscope designed to flash when triggered by the spark from the engine’s Number one cylinder. We’ll start with the basic light and then move on to the more sophisticated dial-back versions and how they function. ![]() Over the course of decades of technical writing, we’ve discovered that not everybody understands how a timing light functions and the insights it can offer on the state of tune of your engine. But for the remainder of the performance world that does rely on distributors, a timing light is an essential tuning device. Safety Recall Information - For important safety recall information, click here.įor any difficulty using this site with a screen reader or because of a disability, please contact us at 1-80 or For California consumers: For more information about our privacy practices, click here.It’s a sign of the times when late model engines with distributorless ignition systems (DIS) no longer require the services of the ubiquitous timing light. For more information, go to or see a Harbor Freight store associate. No other meaning of "Compare to" should be implied. Prices advertised by others may vary by location. To receive the coupon prices online, the coupon code(s) must be entered into your shopping cart.Īt Harbor Freight Tools, the "Compare to" price means that the specified comparison, which is an item with the same or similar function, was advertised for sale at or above the "Compare to" price by another additional retailer in the U.S. PRICES - Although we make every effort to assure that our prices, products and coupons are advertised as accurately as possible, we are only human, and in the event an error is made, we reserve the right to correct it. No use on prior purchases after 30 days from original purchase or without original receipt. ![]()
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