I don't have a cool car I do tune friends cars. 12 psi d16. I use 1.5 for safety purposes. I only street tune at the moment dyno time gets expensive.

I just set my base ignition to 16 to match my ignition maps in crome. At wide open ignition timing was down under 10 higher rpm. Like 6 I think. You can turn you distributor and add subtract timing for you hole ignition map.

More ignition retard keeps ects down but razes egts vice versa for more ignition advance.