While building the SVT Cobra for the seasonal championship, it seemed the stock flywheel revs down faster than it used to. Race flywheel upgrade removes 15 pounds but only adds 2 PI. The stock engine’s Race flywheel adds 5 PI for 15 lbs.
I thought I noticed it last week in another car. The A/B of the stock and swap flywheels both removing 15 lbs but one adds 2 PI and the other adds 5 PI… can’t ignore that.