A487

What engine and what ecu?

These are not from a running engine, they are just some I made to get someone else running.  I believe they can have either a 4 tooth or 24 tooth wheel in the distributor so both options below.  These are from an Xtreme but will load into an Atom ok.
4efe 24 tooth dizzy.pclr 4efe 4 tooth dizzy.pclr

The engine has a fairly low compression ratio (9:1) so I would think around 28-30deg at peak torque N/A. Its really a "how long is a piece of string" question as every engine is different and knock can be dependent on so many different factors. Guessing is really going to just get you into trouble, you really need some way to monitor knock and ideally a load bearing dyno to dial in MBT.