- Feb 21, 2024
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I would wager that this new 8.3L will make similar numbers to the 6.7 HO, maybe 5% more HP and 8% to 10% on the torque side just so GM can claim the title for a few months until Ford releases their new powerplant. The main driver for this was the increased emissions starting in 2027. The current 6.6L Duramax wouldn't be able to make them without actually reducing power. In the 8.3L, the boost will be dropped as I would expect too the compression ratio in order to keep the temps down. The bad part of this is that I suspect that the 8.3L will also utilize the EGR more instead of less as the new emissions standards are pretty steep.A dude with a bow tie takes almost another 1.5 liters to make the same numbers as Ford![]()