Use a timing strobe to set it up correctly, you can advance the timing slightly, will cause the engine to "pink" (knock) so you would need to reduce intake temp and use higer grade fuel, now if you run on optimax all the time and have a very good cold air feed you can usualy get away with advancing the timing a fair amount to get more power and a better burn, Doesnt make a huge amount of diffrence and you must be carefull not to advance to much, golder grade sparkplugs are a good idea aswell but not nessasry unless your running a turbocharger etc..
your better off setting it to OEM Spec
