I could only go as high as 12* on mine, and even then I was still getting a little bit of pinging. It's different for every car. Play around with it a little and see what works best for your application. Probably the highest you could hope for is 14*, but I'd say 12* is likely to be the best you're gonna get without pinging on 87 octane. Maybe compromise a little and run 89 octane...?
lol i posted a topic in talk about a timing problem i had, my mark on the balancer i used was on 10 instead of 0, so my timing was 10 off. i made a new mark and set it to 12 and its running great!