Image:Powerband.gif

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[edit] Summary

This graphic attempts to illustrate the concept of power band and the difference between a torquey engine and a peaky one.

The "torquey" engine, illustrated by the blue lines, makes greater levels of peak torque. The "peaky" engine, illustrated by the red lines, produces less peak torque, and significantly less torque at the lowest RPMs, but produces adequate torque at much higher RPMs; as a result, it produces more peak power.

The "torquey" engine, by virtue of its higher torque at low RPMs, may be easier to drive in day-to-day use. The "peaky" engine, with its higher power, may be faster when driven aggressively, keeping RPMs high.

This graphic is essentially made from my understanding of the topic and needs to be revised as more hard information is incorporated.

[edit] Licensing

I, the creator of this work, hereby grant the permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. Subject to disclaimers.

File history

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	Date/Time	Dimensions	User	Comment
current	20:43, 13 September 2006	826×568 (16 KB)	TomTheHand (Talk \| contribs)	(Uploading a version that separates the two curves more... in the old version they sort of all met at one spot)
	18:53, 13 September 2006	764×488 (14 KB)	TomTheHand (Talk \| contribs)	(This graphic attempts to illustrate the concept of powerband and the difference between a torquey engine and a peaky one. It illustrates horsepower and torque curves of engines that are identical in every way except for their camshafts. )