[ATL_LEGEND]

One of my friends was talking about it and lunch and I didnt know what it was. Could someone tell me what exactly it is? I hate not knowing something about cars around my friends. Thanks.

 

[LegendGS]

Engine knocking is caused by what is known as pre-ignition. This is primarily a characteristic of high compression engines.

When gasoline combusts in the cylinder prior to a spark (i.e. it combusts due to the compression instead of the spark), that is called pre-ignition.

That is why we use higher octane gas. The octane rating basically tells us how resistant to pre-ignition the fuel is. The higher the rating, the higher the resistance.

 

[infinite]

How about detonation? Same thing?

 

[LegendGS]

How about detonation? Same thing?

Yeah, detonation and pre-ignition is the same thing.

 

[infinite]

Thanks.

 

[ATL_LEGEND]

thanks for the info.