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jeffro RA28 Regular Location: Tamworth Registered: August 2004	Re: Higher RON Fuels: Did you know? Tue, 21 June 2005 11:52 Picture this. A flame is ingited prematurely from a hotspot on the far point of the combustion chamber, this flame will then travel towards the spark plug. Whilst the flame is travelling towards the spark. The plug ingites the remaning fuel mixture(on time). The second flame front meets the first causing an extremely high rate of pressure rise. Detonation can lead to pre-ignition because of the increased surface temps in the chamber. They work hand in hand, one leads to another. When these flame fronts meet, this is when u may hear a kock or "ping". Or when then the flame front meets the walls of the combustion chamber. Depending on the severaty, u may or may not here a ping. Remember detonation occurs after the spark plug has ignited its mixture and pre igntion occurs before the mixture is ignited by the spark plug. Hotspots(causing pre ignitiong)can also occur from overhanging gaskets and Overhated valves Detonation will only occur when the PRESSURE and TEMPERATURE in the chamber reaches a point where it ignites the remaining gas in the cylinder instantaneously. Basicly wat trd3sg said but in a bit more detial Not really on topic, but i hope it helps to give some people a little more understanding. [Updated on: Tue, 21 June 2005 11:53] [Report message to a moderator]

	Subject	Poster	Date
	Higher RON Fuels: Did you know?	Matt-itude	Sun, 12 June 2005 09:11
	Re: Higher RON Fuels: Did you know?	justcallmefrank	Sun, 12 June 2005 09:15
	Re: Higher RON Fuels: Did you know?	Matt-itude	Sun, 12 June 2005 09:34
	Re: Higher RON Fuels: Did you know?	justcallmefrank	Sun, 12 June 2005 09:36
	Re: Higher RON Fuels: Did you know?	GBC_069	Sun, 12 June 2005 10:00
	Re: Higher RON Fuels: Did you know?	justcallmefrank	Sun, 12 June 2005 10:02
	Re: Higher RON Fuels: Did you know?	river	Sun, 12 June 2005 11:07
	Re: Higher RON Fuels: Did you know?	ae86drift	Sun, 12 June 2005 11:32
	Re: Higher RON Fuels: Did you know?	Matt-itude	Sun, 12 June 2005 18:40
	Re: Higher RON Fuels: Did you know?	river	Mon, 13 June 2005 05:40
	Re: Higher RON Fuels: Did you know?	thu187	Sun, 12 June 2005 12:23
	Re: Higher RON Fuels: Did you know?	TRD_Supra	Sun, 12 June 2005 13:35
	Re: Higher RON Fuels: Did you know?	no_tofu_speed	Sun, 12 June 2005 14:09
	Re: Higher RON Fuels: Did you know?	TRD_Supra	Sun, 12 June 2005 14:48
	Re: Higher RON Fuels: Did you know?	Corona RT142	Sun, 12 June 2005 23:52
	Re: Higher RON Fuels: Did you know?	TRD_Supra	Mon, 13 June 2005 02:07
	Re: Higher RON Fuels: Did you know?	Arch	Mon, 13 June 2005 02:38
	Re: Higher RON Fuels: Did you know?	Corona RT142	Mon, 13 June 2005 03:01
	Re: Higher RON Fuels: Did you know?	jeffro RA28	Mon, 13 June 2005 03:48
	Re: Higher RON Fuels: Did you know?	Toobs	Mon, 13 June 2005 05:53
	Re: Higher RON Fuels: Did you know?	river	Mon, 13 June 2005 06:12
	Re: Higher RON Fuels: Did you know?	Toobs	Mon, 13 June 2005 06:28
	Re: Higher RON Fuels: Did you know?	CLG	Mon, 13 June 2005 06:42
	Re: Higher RON Fuels: Did you know?	towe_001	Wed, 15 June 2005 00:02
	Re: Higher RON Fuels: Did you know?	trevtrev	Wed, 15 June 2005 03:18
	Re: Higher RON Fuels: Did you know?	CLG	Mon, 13 June 2005 06:17
	Re: Higher RON Fuels: Did you know?	river	Mon, 13 June 2005 06:54
	Re: Higher RON Fuels: Did you know?	bmews	Mon, 13 June 2005 11:12
	Re: Higher RON Fuels: Did you know?	Rainey	Mon, 13 June 2005 13:35
	Re: Higher RON Fuels: Did you know?	bmews	Tue, 14 June 2005 02:30
	Re: Higher RON Fuels: Did you know?	Shraka	Wed, 15 June 2005 03:12
	Re: Higher RON Fuels: Did you know?	st184 sillycar	Wed, 15 June 2005 09:56
	Re: Higher RON Fuels: Did you know?	trd3sg	Sun, 19 June 2005 06:44
	Re: Higher RON Fuels: Did you know?	st184 sillycar	Thu, 16 June 2005 10:06
	Re: Higher RON Fuels: Did you know?	jeffro RA28	Tue, 21 June 2005 11:52
	Re: Higher RON Fuels: Did you know?	Nark	Wed, 22 June 2005 08:14
	Re: Higher RON Fuels: Did you know?	riceburna73	Thu, 16 June 2005 11:34
	Re: Higher RON Fuels: Did you know?	Corona RT142	Thu, 16 June 2005 22:55
	Re: Higher RON Fuels: Did you know?	Norbie	Fri, 17 June 2005 00:52
	Re: Higher RON Fuels: Did you know?	THE WITZL	Fri, 17 June 2005 03:50
	Re: Higher RON Fuels: Did you know?	st184 sillycar	Sun, 19 June 2005 01:09

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