I'm not an expert by any means, but here is my experience. I had an A headed 588 on my dragster. About 14.3:1 with a domed piston. It was injected on methanol. I played with the timing back and forth and it ran best at 31°.
I sold the car turn key and the new owner put it on race gas with a carb. At first it was down a little on the mph. He bumped the timing up to 33° and it picked right back up to where it was.
To answer your question, I think it depends on your fuel, piston design (dome or flat) and the cam profile. No best answer other than to try it out. Personally I would start at 31° then run it. Then try it 2-3 deg in each direction to see what it likes.
I sold the car turn key and the new owner put it on race gas with a carb. At first it was down a little on the mph. He bumped the timing up to 33° and it picked right back up to where it was.
To answer your question, I think it depends on your fuel, piston design (dome or flat) and the cam profile. No best answer other than to try it out. Personally I would start at 31° then run it. Then try it 2-3 deg in each direction to see what it likes.