I would not say should.... This is something I am trying. Heat and pressure will cause a fuel/ air mixture to self ignite prior to a spark event..Less heat ( intercooler ) means more control over ignition of fuel
If fuel ignites to soon there is " knock ". Cylinder pressure should reach a peak at about 16 to 20 degrees ATDC . Sooner will cause stress over tolerances Later will reduce torque/ power .
I am applying ideas based on what I have learned about engine operation