[bhavyas]

Originally Posted by JRS

bhavyas, I will try to explain what I mean as best I can.

This isn't the Camaro's numbers but this is an example. Most chevy's run about 20 degrees of base timing which is 20 degrees before top dead center that the engine fires, this is 20 degrees advance because it is before top dead center (btdc). The computer retards the timing when it's cold to light the fuel off better because fuel doesn't atomize or burn until the fuel is hot enough to evaporate, remember fuel vapors are what ignite.

If you look at the graph in the pic it shows 14.8 at 32 degrees temp which means it takes 20 -14.8 degrees which means the engine is running at 5.2 degrees before top dead center which is retarded from the base timing of 20 degrees.

Some people may understand when I say with an old distributor if you turned the cap and it retard the timing (after top dead center) the exhaust gets hotter and the engine makes a lot of noise because your firing the fuel off after top dead center which means you fire closer to the exhaust valve opening or when it's open.

I hope this helps because you could have a whole forum on just timing on these Camaro's because of the direct injection and emissions.

Hmm... very interesting.. the only reason I kept prodding was because I love understanding the mechanics of the car works.. and you know what I just discovered... my concept abt retarded and advanced timing was wrong.. so thanks for that explanation!!