sohc vs dohc

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S13inBatnRuge
Posts: 569
Joined: Fri Feb 11, 2005 6:37 pm
Car: 93 240sx

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i always wondering what are pros and cons of having a sohc vs a dohc is dohc more powerful engine? better on gas mileage? just wondering. figured someone here would know.

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Ezekial
Posts: 355
Joined: Sun Nov 28, 2004 4:42 pm
Car: 2001 Nissan 200SX S15

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niteboo wrote:i always wondering what are pros and cons of having a sohc vs a dohc is dohc more powerful engine? better on gas mileage? just wondering. figured someone here would know.
Generally DOHC means at least 4 valves / cylinder ... as opposed to SOHC having 2 or 3 ...

Some SOHC have 4 valves / cylinder however ... and then the difference in power is not as great ...

More valves, more air, more hp ...

Also, having DOHC means you can adjust both inlet and exhaust cams seperately for the best result ...
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PoorManQ45
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Joined: Fri Jul 02, 2004 5:13 pm

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I think it just gives the engineers more control over the airflow of the engine sinse they can tune the exhaust and intake ports seperatly
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