engine break in

I wouldnt let the engine idle for 45mins, maybe 45mins at 2000-2300rpms, but not at 650rpms, not enough oil pressure, plus not enough combustion pressure to seat the rings or have the rings start to rotate.

I owuld do a 20 minute 2200rpm high idle, drop the oil, then take it out and do some mild acceleration with little if any boost.

You must seat the rings, but these GEN 3/4 engines take thousands of miles to fully break in at leats in a NA setup.

peace
Hog