Advance Spark Antique Cars

You can also find used classic cars for sale by owner and private sellers - pre-owned classic and old classic cars.

Advance spark antique cars. Basically you need to drive the car and play with the timing and youll find out the spots of advance where your car runs best under different circumstances. Apply the foot brake. These Compasses may not work properly due to their age.

Weve even talked about the spark but not specifically about the spark plug. The Model A has just been started. It is usually expressed in number of degrees of crankshaft rotation relative to TDC.

They may have a vacuum advance or a centrifugal advance. Basically the faster then engine runs the more spark advance you need. The points also control the timing of the spark.

Move the shift lever to the left and back for first gear. Theyve become popular in vintage-BMW circles as these eliminate mechanical spark advance. Most cars and trucks up until the late 1930s got along fine without a vacuum advance.

A typical vintage Ford or Chevy small block with a mild camshaft will perform well with a spark advance curve that has 12 degrees initial timing plus 24 degrees of mechanical advance all in by 3600 rpm with an additional 10 to 12 degrees from the vacuum advance. You may have seen two small levers usually located on or below the steering wheels on antique vehicles. Please take a look in the advance curve table of the specific unit for available advance curves.

We have discussed at length the means of delivering a high voltage surge to the spark plugs in order to produce a spark which can ignite the compressed fuelair mixture. As engine speeds increase the weights progressively rotate on a wider radius advancing the rotor relative to the cap and consequently advancing the ignition timing. As the throttle valve is opened it swings past the vacuum port which applies vacuum to the diaphragm moving it against spring pressure and advancing the breaker plate.