Adjustment knobs coupled with a tachometer allow for more precise timing measurement at different RPMs.Adjustment knobs that allow for the timing to be read at different RPMs are available on some models.It should be able to read both two-cycle and four-cycle engines.
Knowing this allows adjustments to be made via manipulation of the distributor cap to make the spark plugs fire before or after the piston has reached the top dead center, depending on the malfunction or issue that needs to be fixed. By aiming this strobe light in the proper place, usually the crankshaft pulley, you will be able to read the degree markings on it, which are indicative of where the crankshaft is in its rotation and the respective pistons. Inductive timing lights, when connected properly to the car's engine and battery, detect the electricity every time the plug fires, and every time the plug fires, the timing light shoots a beam of light. The light is powered by the vehicle it is being used to test. The light can be a stroboscope that may use a simple neon lamp or a xenon strobe lamp that provides brighter light and better use in daylight or in shop lighting. Timing lights are diagnostic tools used to observe ignition timing in vehicles with distributors and are available as self-contained units or as a part of a more comprehensive engine analytical tool. I just know that on my engine, I cannot use a digital light-I have to use the older style analog light.See Your Car's Diagnostics More Clearly With Automotive Timing Lights I have NO idea why this worked and why my fancy digital light makes it read 20 degrees to far advanced. I tried this and with this older analog light, the timing was no longer way advanced-the reading was right where it should be and I was able to time the car with no problem. MSD had also responded that some newer digital lights do not read properly when connected to the higher voltage MSD systems and he said to use an analog timing light instead. I dug out my old Sun light that I paid $5 for and gave it a try. We tried several different digital timing lights and all said the same thing-they said that I was about 20 degrees too high even though the motor ran like it was timed pretty close to perfect.Ī TC member then recommended that I use an older analog timing light. I changed timing tabs, checked TDC, seperated my wires, rechecked my balancer, etc and the motor was always way too far advanced (according to the timing light). I installed a 383 with MSD HEI and we had a heck of time trying to set the timing with a digital dial back light-it was always about 20 degrees too far advanced. Doesnt seem like it would start well with mid 30s initial, but I guess that wouldn't be different than running a locked out distributor at same setting, correct. Seems unlikely to me that the motor would run well, at least for very long with total advances up in the 50s. Where I'm headed is to try to determine if this is just a light issue, a situation where my inductive lights give false readings due to the MSD multiple spart system, BEFORE I spring for a big dollar MSD light. MSD also says to keep the twisted distributor wires away from all other wires, which I have not done, will change that to see if that makes a difference in light issue. I have read other posts from guys who have stated same thing. I read in the MSD book that spark duration is 20 degrees with the MSD multiple spart setup, except at high RPMS, MY timing seems to read about 20 degrees high with both of my timing lights.
When I set timing at 18 initial, engine runs okay, but seems retarted, If I turn the distributor to advance it more, it runs much smoother, starts okay still without kickback, and the light will show about 34-36 degrees initial and FIFTY FOUR or so total. MSD 6AL, MSD Pro-Billet, mechanical advance only, 18 degrees initial, 18 degrees mechanical, no vacuum. Correct balancer top dead center was established correctly at assembly, cam was degreed in, all double and triple checked.
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