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**Shane@DBPerformance** · 05-21-2008

How much timing did Keydiver remove from your chip, did he know it was a 9.5:1 motor? Factory 1G timing is way too much for even a 8.5:1 compression engine. Running 11-12psi wouldn't make it safe either, at lower load often runs even more timing depending on where you land in the timing map. A 9.5:1 compression pump gas DSM wouldn't be able to take barely any timing/boost without knocking. Did you pull the spark plugs and check for detonation the plugs and piston tops? Did you set the base ignition timing? Did you have a wideband on it?

05-21-2008	#2
Shane@DBPerformance formerly ecoli Join Date: Oct 2003 Location: On the dyno Posts: 4,892	Re: experienced engine builders only. How much timing did Keydiver remove from your chip, did he know it was a 9.5:1 motor? Factory 1G timing is way too much for even a 8.5:1 compression engine. Running 11-12psi wouldn't make it safe either, at lower load often runs even more timing depending on where you land in the timing map. A 9.5:1 compression pump gas DSM wouldn't be able to take barely any timing/boost without knocking. Did you pull the spark plugs and check for detonation the plugs and piston tops? Did you set the base ignition timing? Did you have a wideband on it? __________________ www.dbptuning.com