Back when trucks had points you could adjust, dwell angle was what you gapped your points at. I am 25 years old and do have a dwell meter and timing light. Buy online, pick up in-store in 30 minutes. Does anyone know where I can find a good old fashioned dwell meter? The timing light can also be used to determine if there is any timing chain slop. This ensures points stay open for the correct time for perfect firing.
Whether you're on the street or at the strip, rest assured that you'll have an easier time knowing when to shift and keep your engine in the sweet spot by investing in a high-quality tachometer from AutoZone. A customer bought it and I have at least one more and haven't used one in years other than one the customers vette. So, I'm looking for a recommendation on where and what to buy as a replacement? I would set it where I thought it belonged, then drive the car. I'd like to not spend much since it is an infrequently used tool, but am interested in all comments and suggestions. Please contact Customer Care for any warranty questions.
The negative meter lead goes either to an engine ground or to a battery ground- not to the coil. Friction wore them out a little sooner, but you got a few more rpm's out before floating. I have a dwell meter, bought it a few years ago. Soup up your ride with aftermarket tachometers from AutoZone and enjoy our premium selection, available from some of the most trusted brands in the industry. Initial bad info on this reply has been edited out to avoid confusion On Fords anyway. Butch, I still remember you. I took it apart just to confirm it wasn't a lose wire.
Caldwell writes articles on a wide range of topics including travel, camping and automotive mechanics. A dwell meter is actually a voltmeter, and it's reading an average of the points-open voltage full charging system voltage and zero volts when the points are closed. Kind of off topic, but a trick we used to do was take the points apart and bend the spring back to gain a bit more tension against the lobe. If so, turn the selector to that position, then before you connect the meter to the engine, connect the meter leads together and adjust the pointer to whatever set or calibration line is marked on the meter scale. I suppose in some arcane way it is like asking for a hand crank handle for a model t, though I have one of those also.
So I figured that doc letting me have a free membership I could part with it and pay shipping costs too. I took it apart just to confirm it wasn't a lose wire. Basically I just put a piece of reflective tape on the crank pulley, aimed the pickup looks like a timing lite at the tape and squeezed the trigger. Get ready to invest in some old school tools to get the engine running right, like a dwell meter for every tune up. There probably is a 'Cal' position on the function selector knob. Enjoy our Same Day Store Pickup option on online orders if you need your tachometer right away. In the old days, when the points were closed, a magnetic field was built up in the primary side of the coil.
As the dwell increased, the timing retarded, I believe for each 2 degrees of increased dwell, the ignition timing would retard 1 degree. A V8 engine theoretically has a maximum of 45 degrees - but in reality a single points system runs 28-32 degrees and a dual point system runs 38-42 degrees of dwell. You might be in the same league of quality old-time mechanics. Years later, I learned that he was functionally illiterate, and had to quit being a mechanic when the engine diagnostics became too technical. Some distributor caps do not have a window to insert an Allen wrench to adjust the dwell angle. Also make sure the electrical leads do not contact any part on the engine that develops excessive heat, such as the exhaust manifolds. He never touched the engine.
Funny thing about that, I went in to 4 auto parts stores last week looking for a flexible points adjustable tool remember the tool to adjust points dwell while the engine is running? The timing light is used on a distributor equipped timing belt job to verify ignition timing even if the theory is that nothing will change during a job like this. Vehicle service manuals list the proper angles for specific autos. Pretty much right after I updated a lot of my hand-held diagnostic equipment to current, modern-day standards. Dwell is the time that the points are closed and charging the coil measured in crankshaft degrees. Digging through my memory bank I believe it will be 1984 as the year I last use a dwell meter professionaly,add 10 for the discrete timing light. By setting it at 26, then when the point contact block wore down, the dwell would increase , but still be in spec.
My dwell meter was at home and I asked the guy at the auto parts store if they had a dwell meter, as I figured I would spend the 50 bucks assumed to get a new one to continue water skiing and tubing on the 2 week a year boat. Cars are now almost beyond me, but I still know how to check the oil. When the positive + terminal is connected to the chassis, this is referred to as positive ground. After everything is set up, don't forget to set the function selector to the proper cylinder position if the meter has that setting- it probably has- I haven't looked at a Sears dwell meter for quite a while. Always follow all of the instructions and warnings included with our products. I got a blank stare, so he called the old timer there and he said we have not had one of those for at least 20 years.
Bill, The positive lead of the meter goes to the coil negative terminal, or to the wire terminal on the distributor- either connection will do, but the coil connection is a better choice. Engine and Transmission Warranty Claims. Thanks, doc Well looky here buddy I have something I want to send you. When I used to set up my 312 Y-block, I would set the dwell at 26 degrees. Also, there should be a black bar at the high end of the meter scale, and may be identified as 'Distributor Resistance.