- Banned
- #76
Computer algorithms try to keep the engine in the pink area, not always possible unfortunately, as seen below on a typical DOHC I-4, most efficient in the pink at high-ish load & around 1,800 RPM. (Atkinson & the long 2.5L engine's stroke lowers the RPM of max efficiency compared to this "typical, modern" DOHC 1.9L just a bit.) ... note: RPM on the x-axis, torque on the y-axis, where torque is the cylinder filling Load.
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