The pistons are weak because the ring is so high to meet emissions that they cant take any boost. They do not move the rings Hi on the pistons for emissions...... The high ring placement has two (2) benefits: - reduced emissions due to less crevice area above the ring to capture unburned air/fuel mixture - improved torque due to better combustion efficiency For OEMs, it's the first reason that drives this trend: https://www.enginebuildermag.com/2005/01/piston-ring-technology-stock-and-performance/
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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