I run 36 degrees total timing (comes in full at 2400rpm) with the TFS race heat heads, close to 11:1 compression and a very aggressive cam profile. I can also get away with running 87 octane fuel if I have to, but the motor gets hotter, and I imagine it's detonating to some small degree that I can't hear.
Depending on your setup, you may or may not get away with more timing, it's difficult to know such things without testing the motor and monitoring its vitals. I would definately start conservative and see how it performs. Better safe than sorry.
Depending on your setup, you may or may not get away with more timing, it's difficult to know such things without testing the motor and monitoring its vitals. I would definately start conservative and see how it performs. Better safe than sorry.