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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
I have heard that but I dont think its true. I felt no decrease in my low end when I bumped mine... but it could of happened and just been so minimal that I did not realize ya know.
right now im almost positive my timing is at 10* and im running 87 octane
so say I bump it to 13*, what changes would you suggest making?
I would advance it to 14* and run the higher octane. You can even go a bit further if you want. Some people will keep advancing it 1* at a time until they hear pinging at WOT. Then they set it back 1* and run it there. Others say that they notice no real gains past 14* or so. But I haven't heard people complain about anything between 10 and 14.
Just remember, don't go cheap on the gas!
im at 11 1/2*, 93 octane, and still ping at high rpms [:@]