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Thread: is it possible to convert a ohc engine to dohc

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    Default is it possible to convert a ohc engine to dohc

    today I saw a 70 with a 108 head cylinder and first I thought it would be a 124 head cylinder and when I talk with it onwer he said that the bike is 108 head cylinder and had 4 valves but as I know only dohc engine have 4 valves ohc have max 2 valves is it possible to convert a ohc engine to dohc


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    sohc also can have 4 valve also not big deal.. and no its not possible without major change ...

    Quote Originally Posted by saboor73 View Post
    today I saw a 70 with a 108 head cylinder and first I thought it would be a 124 head cylinder and when I talk with it onwer he said that the bike is 108 head cylinder and had 4 valves but as I know only dohc engine have 4 valves ohc have max 2 valves is it possible to convert a ohc engine to dohc
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

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    Quote Originally Posted by vickytulla View Post
    sohc also can have 4 valve also not big deal.. and no its not possible without major change ...
    bro if sohc engine could have 4 valves per cylinder so why there is a need to build a dohc engine

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    a SOHC or single overhead camshaft engine uses a single camshaft on the headto lift all the valves, whereas in a DOHC or double overhead camshaft head, two camshafts are used to lift the valves (a camshaft each for intake and exhaust valves) ; normally, SOHCs are used in both16 valve or 8 valve configurations (for a four cylinder engine), but DOHCs are used in 16 valve configurations (or more) only. some exceptions are there.a DOHC layout is better than a SOHC layout in many ways- in DOHCs, the valve timing is more precise, and better valve lift is achieved. also, a DOHC setup eliminates the need for rocker arms, hence creating better timing, and valve contact is more direct too. but of course, these are all in stock form. a SOHC layout, when tuned, can be as efficient as a DOHC,but under proper tuning, DOHCs always achieve more power than SOHCs..

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    there is a website called "letmegoogleitfotyou.com" shoudl I use it

    Quote Originally Posted by saboor73 View Post
    bro if sohc engine could have 4 valves per cylinder so why there is a need to build a dohc engine
    https://www.pakwheels.com/forums/motorcycle-travel-diaries/277725-sober-riders-visit-khunjerab-adventurous-way-via-nori-pass

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