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Cylinder Numbers?

Discussion in 'The Garage' started by RustBuket, Mar 12, 2003.

  1. RustBuket

    RustBuket 1/2 ton status

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    /forums/images/graemlins/confused.gif Somebody help. I know I should know this but how do you number each cylinder in a SBC? Is it:

    (Looking from the front)

    4 8
    3 7
    2 6
    1 5

    or

    7 8
    5 6
    3 5
    1 2
    Something else?? /forums/images/graemlins/1zhelp.gif
     
  2. HarryH3

    HarryH3 1 ton status Author

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    It's something else. /forums/images/graemlins/shocked.gif

    From the front:

    8 7
    6 5
    4 3
    2 1

    /forums/images/graemlins/thumb.gif

    If you look closely at the engine, you'll notice that the head on the drivers side is slighty forward of the one on the passenger side. GM counts their cylinder numbers on V8's by the connecting rods position on the crankshaft. So the furthest forward is cylinder 1, while cylinder 2 is just behind it, but on the other side of the engine. /forums/images/graemlins/cool.gif
     
  3. SCOTTS_4X

    SCOTTS_4X 1/2 ton status

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    driver's side front to back = 1 3 5 7

    passenger side front to back = 2 4 6 8

    -Scott
     
  4. RustBuket

    RustBuket 1/2 ton status

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    Ah, I understand!
     
  5. pismorat

    pismorat 1/2 ton status

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    Isn't the firing order 1 8 4 3 6 5 7 2?? Thats by memory. /forums/images/graemlins/truck.gif
     
  6. Shaggy

    Shaggy 3/4 ton status

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    [ QUOTE ]
    Isn't the firing order 1 8 4 3 6 5 7 2?? Thats by memory. /forums/images/graemlins/truck.gif

    [/ QUOTE ]

    <font color="green"> Yep, and here's the trick to remembering for those that don't know it -

    18 4 36 5 72 Notice that the paired up numbers are 18, 36, and 72. So basically it just doubles each time, 18x2 is 36, 36x2 is 72. Put the remaining 2 digits in order (4 then 5) between the 18 36 and 72 and that's the firing order. 18436572. /forums/images/graemlins/thumb.gif </font>
     
  7. SkulzNBonz

    SkulzNBonz 1/2 ton status

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    in reply to
    [ QUOTE ]
    7 8
    5 6
    3 5
    1 2

    [/ QUOTE ]
    Where's #4? /forums/images/graemlins/eek.gifj/k

    John
     
  8. Goober

    Goober 1/2 ton status

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    [ QUOTE ]
    18 4 36 5 72 Notice that the paired up numbers are 18, 36, and 72. So basically it just doubles each time, 18x2 is 36, 36x2 is 72. Put the remaining 2 digits in order (4 then 5) between the 18 36 and 72 and that's the firing order. 18436572

    [/ QUOTE ]


    That's cool! /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
     
  9. Z3PR

    Z3PR Banned

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    Got a stock intake manifold laying around ??? The fireing order is printed on the older ones.
     

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