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| THE READ FOR SPEED by Ned Erkman |
| CHAPTER 3 |
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Intake and Exhaust Valves
The intake and exhaust valves open and close to allow airflow to enter and exit the engine. The size and shape of intake and exhaust valves have a significant impact on airflow and power production. In addition, the valve seat angles in the valve job and valve angles on the valves also have a very significant impact on airflow and engine performance.
Technically, air and fuel cannot flow straight from the intake port directly into the cylinder, and the exhaust gases cannot flow straight out from the cylinder directly into the exhaust port. Fundamentally, air, fuel and exhaust must move around the valve to get in and out of the cylinder. The effective and efficient movement of air around the valves is what promotes better airflow and improves power and performance.
Ned Erkman
Author of The Read for Speed
Copyright © 2005 The Read For Speed. All Rights Reserved.
Reproduction in whole or in part without expressed written permission from the author
is strictly prohibited.
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