Chapter171Performanceengines

Chapter171Performanceengines - Performance engine...

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Performance engine preparation Engine realities Production engines used as a base Designed for WOT 10% of the time Cold starts and operation Fuel vaporization Street engines require vacuum EFI sensors Power brakes Spark timing on some engines
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Performance engine preparation Engine realities Emission testing NOX tested on a chassis dyno
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Performance engine preparation Enhancements for reliability Increased bearing clearance for cooling Oil volume increases 5x, with double clearance High volume oil pumps to maintain pressure Increased sump capacity & windage trays Increased spring pressure Guide plates to stabilize valve trains Reduced reciprocating weights High strength fasteners Engine balance
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Performance engine preparation Improving efficiency Increase cylinder filling on intake stroke Increase volumetric efficiency Increase cylinder pressure Increase flow into cylinders Mean effective pressure on power stroke Avoid detonation
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Performance engine preparation Volumetric efficiency Air flow into engine divided by swept volume Does not include clearance volume Includes air flow lost during overlap
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This note was uploaded on 01/06/2012 for the course AUTO 94 taught by Professor Davecapitolo during the Fall '03 term at DeAnza College.

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Chapter171Performanceengines - Performance engine...

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