Adjusting ignition timing on a distributorless engine
 

So, I semi-recently got an adjustable cam timing pulley for the Paseo. This is going to alter some things and I'm thinking it might be advantageous to tweak ignition timing as well. What are my options?

Typically the only option that doesn't screw with anything else is to have the timing values changed via computer tuning.

Yeah, I kinda figured that. Are there any piggyback systems that only handle ignition timing? I'd rather not have to get a full piggyback, but I suppose that would work too. Kinda looking for something inexpensive. The cam pulley cost ~$100, so I'd rather not spend another $100 on adjusting ignition... But, it looks like I might have to.