Generally when a spec is given with a + or- it means if the timing is within the spec when you check it you do not need to adjust it. So if it is 15 degrees or 11 degrees just leave it alone. It can also mean you can move it up to 2 degrees in either direction of 13. Sometimes it is useful if you are experiencing overheating or pinging. In my experience 13 is OK for the most part but if the gass in your area is not good or you are at a high elevation you may have to go away from 13. Straying from 13 can cause a loss in performance and/or gas mileage while also affecting emissions. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "delorean6859" <tmadsop@xxxx> wrote: > I just completed a major tune-up and performance upgrade on 6859. I added John Hervey's kit with the Bosch platinum + 4 plugs, 8 mm wires, MSD Blaster + 2 coil and high performance resistor. I know the timing can be adjusted plus or minus 2 degrees. Does adjusting it at a certain point within that range yield better performance. If so, does it vary with grade of gas? I am currently right at 13 degrees and haven't had the time to play with timing (plus I am not in the mood to stick my hand in a hot engine to play with the adjustment). Just getting the timing to 13 degrees has resulted in me burning the finger prints off of my hands. > > Nate To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/