answersLogoWhite

0


Best Answer

There are two different timings you can advance. Cam timing or Ignition timing, I will assume you are reffering to ignition timing. lets first understand what happens in an engine with respect to this type of timing (short version). An ignition systems job is to deliver spark from the ign. coil to the cylinder at the predetermined time to ignite the air and fuel that has been ingested into each cylinder. For ease of understanding we'll focus on one cylinder. When fuel mixture is taken into the cylinder it is then compressed by the rotating assembly. The compressed mixture requires a spark from the spark plug (in other words high voltage jumps across an air gap inside the cylinder) this ignites the fuel and energy is then transformed into heat which forces the piston back down the cylinder bore. This is a"timed" event, spark is introduced a few degrees of crank shaft rotation before the piston reaches its highest point of travel or top dead center. So in other words fuel mixture actually begins burning as the piston is coming up. The important thing to remember is that fuel burns at a constant rate, however engine speed increases. As engine speed increases (RPM's) the spark needs to be introduced earlier and earlier or more degrees before top dead center. This helps burn more of the fuel in the chamber as it comes to top dead center. This burns more of the fuel enabling the engine to benefit from the complete burn of all the fuel in the chamber. Engines have mechanical devices or computers that automatically advance the timing. To add additional timing begins the spark, fuel burn process even earlier (more degrees before top dead center). In some applications this can be advantageous, in others it can cause pre ignition AKA detonation which can destroy an engine. If you need to know what specific timing recommendations are for your application one needs to know the specifics of your equipment and your goals. Hope this helps, there are many books about this subject that are much more in depth.

User Avatar

Wiki User

14y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What happens when you advance the timing on a engine?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What Should the total timing advance be on a 1995 Chevrolet 350 engine?

The total timing advance on a 1995 Chevrolet 350 engine should be around 35 degrees. This takes into account the advance provided by the ignition system.


What does the advance wire do for timing?

It retards the timing so the engine is easier to start. After it starts, it advances the timing back to an advanced position for best engine performance.


What is an ignition timing advancer?

Ignition Timing Advancers are mechanical 'bolt-on' pieces to advance the ignition timing of the engine to a specific degree of timing advance. The majority of its application for these parts are for motorcycles or on racing applications.


What is advanced ignition timing?

Ignition Timing Advancers are mechanical 'bolt-on' pieces to advance the ignition timing of the engine to a specific degree of timing advance. The majority of its application for these parts are for motorcycles or on racing applications.


What is cold advance start?

If I understand your question properly I think you're referring to the engine timing. (when the spark plugs fire in relation to the rotation of the engine) When the temperature sensors on the car sense the engine is cold it will advance the timing of the engine to keep it from stalling out.


How do you advance the timing 289 ford engine 1965?

By rotating the distributor.


Does a 1998 chevy vortex engine have two timing marks?

There should be advance marks on the harmonic balancer, and timing marks on both timing chain gears.


How do you advance timimg on 1993 escort lx?

You can't because the timing is controlled by the engine computer.


What should be the total timing advance be in a 350 chev engine?

Need to know what year it is to answer correctly


How do you advance the timing on a Ford 302?

Loosen the distributor hold down first. On most distributors turning clockwise will advance timing, CCW will retard timing. For V8s I like to set the timing like this: Advance timing a bit, then grab the throttle on the carb and rev the engine to full throttle. Keep repeating these 2 steps until the engine stumbles or pings when you rev it up. When you get to that point set the timing back just a touch, and rev it again to make sure you are at the point just before where it wants to stumble.


How do you check a vacuum advance with a timing light?

Disconnect and plug the vacuum line and time the engine. Reconnet the vaccum and recheck the timing which should be advanced.


How do you set cam timing on a 350 cheverlet marine engine?

MOST STOCK CAMS DO NOT HAVE THE ABILITY TO DO CAM "DEGREEING" WHEN INSTALLED, SO THE INITIAL TIMING MUST BE DONE WITH A TIMING GUN. ADJUST THE TIMING BY ROTATING THE DISTRIBUTER IN EITHER DIRECTING UNTIL THE DESIRED AMOUNT OF ADVANCE OR RETARD IS ACHIEVED. SOME AFTERMARKET CAMS HAVE SEPERATE KEYWAYS SO YOU CAN ADVANCE OR RETARD THE TIMING BY A FEW DEGREES WHEN YOU INSTALL THE CAM. A GOOD START FOR YOUR ENGINE WOULD BE 8 TO 14 DEGREES OF INITIAL ADVANCE.