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Advantages of single overhead camshaft engines (SOHC)…..

May 31st, 2009

Finishing up the What is a Single Overhead Cam Engine post:

The main advantages of SOHC Engines Compared to DOHC Engines

A single overhead camshaft set up basically represents a simpler version of the more complex dual overhead cam engine. As indicated in its name, a dual overhead cam uses two camshafts per bank of cylinders to regulate valve control causing greater weight to be added to the engine.

Due to lighter valve-train weight, a single overhead cam engine also features a performance advantage over dual overhead cam setups with lower end torque values.

The single overhead valve configuration is quite mechanically friendly and allows modern engine builders a great deal of performance-seeking freedom.

Both single and dual overhead cam engines can easily facilitate variable valve timing. First developed for the dual overhead cam engine, Honda’s VTEC system was modified for use with single overhead cam engines. However, due to size constants within the cylinder head in this configuration, the VTEC valve timing can only be exercised on the intake valve.

Current SOHC Engines in Production

Besides Honda VTEC engines, a leading champion for single overhead cam technology is the 2 valve and 3 valve version Ford Modular engines powering the Mercury Grand Marquis as well as the Ford Mustang. With pushrod valve-trains commonly associated to American muscle engines, Ford had previously produced a limited number set single overhead cam of 427 V8 engines to compete with Chrysler’s HEMI engine on the NASCAR circuit.

One of the largest engines incorporating the single overhead cam setup is the Mercedes-Benz V12 engines available on the SL Class, as well as S65 and SL65 AMG. Attributed to saving weight, the single overhead cam V12 can also earn credit for 510 horsepower and 604 horsepower, respectably

The two articles on SOHC engines should provide enough info to understand them in simplicity. GotEngines.com at 1-866-320-1065 has immediate delivery on nearly every SOHC engine on the market today. We also provide information on many other aspects of your car on our GotTransmissions.com Blog. Subscribe for free and enjoy.

One Response to “Advantages of single overhead camshaft engines (SOHC)…..”

  1. Tristan Throup says:

    There’s also a fact that SOHC engines can deliver better fuel economy than DOHC engine. The simple layout of an SOHC engine enables torque to be made at low to medium RPM which is ideal for urban driving whereas most of the torque in DOHC engines come from high RPM.

    As the article suggests, SOHC engines are mechanical friendly which is good.

    Good job Honda for sticking to SOHC.

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