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Valve/Piston Question 200

posted by  tegelme on  Sun May 23 01:01 CST 2004
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Which valves/pistons move faster as the car is excelerated?








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    Valve/Piston Question 200

    posted by  Don Foster on  Sun May 23 03:23 CST 2004
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    last visit: Sun Oct 5 11:53 CST 2014
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    Is this a trick question?

    --
    Don Foster (near Cape Cod, MA)








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      Valve/Piston Question 200

      posted by  tegelme on  Sun May 23 13:27 CST 2004
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      Not at all! I'm trying to figure out if the knocking that rocked my car and would cause it to cut off when I came to a stop, unless I put the car in neutral, is something that I can repair or if it's indicating an engine overhaul--or worse.








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        Valve/Piston Question 200

        posted by  someone claiming to be twoforty on  Mon May 24 01:36 CST 2004 [RELATED]

        Are you valves adjusted correctly ? Knock sensor can react to excessive valve noise and retard your timing.

        Just a thought.

        twoforty








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        Valve/Piston Question 200

        posted by  Trev29 on  Mon May 24 00:50 CST 2004
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        last visit: Fri Oct 17 05:56 CST 2014
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        How's your base idle? If it is too slow even the slight drag caused by the trans in gear will cause the car to stall.

        As to which moves faster valve or piston? I'd say piston as it travels a further distance per rev than the valve.

        Which piston moves faster? My guess would be piston #1 as it is always leading (ie. at the front of the engine), when the car is going forward. (If it were slower the other pistons would catch up and pass it.)
        --
        1980 245 Canadian B21A with SU carb and M46 trans








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    Valve/Piston Question 200

    posted by  someone claiming to be twoforty on  Sun May 23 01:54 CST 2004 [RELATED]

    Interesting question.

    Velocity wise, I would say the valves....in that they have a shorter distance to travel than the piston. However, each valve should only cycle once every forth cycle of the piston. The piston has a further distance to travel, and is in constant motion, whereas the valves are at rest (for a brief period) during three of the pistons cycles.

    I'm sure there are those out there who can figure the exact time it takes for a piston and it's valve to function, and be able to mathamatically come up with the ration of speeds as to RPM's. Not me.

    Just my thought.

    twoforty








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    Valve/Piston Question 200

    posted by  Joe HC on  Sun May 23 01:46 CST 2004
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    last visit: Sat Jun 21 08:19 CST 2008
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    All of them.

    --Joe HC
    --
    1977 244 160k (?), 1988 245 214k (soon to be dismissed), 1990 244 102k, 1978 Fiat 124 Spyder (restoring)







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