holley secondary plate to metering block conversion

Discussion in 'High Performance Modifications' started by muscl car, Nov 29, 2008.

  1. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    i'm thinking of installing a metering block on the seconday side of my holley 660's and also converting to dual feed bowls . now what metering block to do i need to get and also what size jets to use ........right now i'm using the secondary plates that are stock on the 660's and they're 134-12's

    i might even do this same conversion to a set of 450's i've got and those secondary plates are 134-30's
     
  2. ZS10

    ZS10 Moderator Staff Member Lifetime Gold Member

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  3. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    darn :mad: ............ i used to have that exact book but i traded it for some other stuff oh well i guess i'll buy another copy and keep it this time
     
  4. Mwilson

    Mwilson Veteran Member

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    I have that book somewhere?
     
  5. ZS10

    ZS10 Moderator Staff Member Lifetime Gold Member

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    If ya can't find one let me know and I'll find and go through mine. Trying to figure out which exact metering block to use is a bit sketchy, as that gets into the air bleed sizes, but there are direct plate# to jet size tables.
     
  6. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    tom ............ i would appreciate that if you could look up the info for me so i can figure out secondary jetting . while looking on holley's website i totally forgot about the metering block conversion kit for a 4160 carb to a 4150 series its part # holley 34-13 and includes a metering block gaskets and related hardware for $41.99 ea .i also sent an email to holley's tech dept about the metering blocks for both the 450 and 660 but haven't heard back from them
     
  7. Damon

    Damon Veteran Member

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    First number is the plate number, second number is the equivalent jet size:

    3/56
    4/59
    5/63
    6/69
    7/53
    8/64
    9/64
    10/65
    11/72
    12/73
    13/63
    14/85
    15/82
    16/64
    17/69
    18/63
    19/69
    20/69
    21/75
    22/65
    23/64
    24/72
    25/77
    26/79
    27/79
    28/65
    29/75
    30/64
    31/74
    32/59
    33/64
    34/53
    35/69
    36/64
    37/69
    38/71
    39/69
    40/59
    41/69
    42/94
    43/71
    44/74
    45/79
    46/75
    47/78
    50/79
    53/65
    54/82
    55/78
     
  8. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    so my secondary plate #134/30 should transfer over to a #64 jet then .....correct ??:)
     
  9. ZS10

    ZS10 Moderator Staff Member Lifetime Gold Member

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    yep! Nice list, my book has the plate hole size list, which must be crossed with the jet hole size to find the jet size.

    I've gone back and forth with blocks on the 3310. Plate works just fine so I leave it in.

    Do you have enough room between your carbs to get a block in there Chuck?
     
  10. muscl car

    muscl car Veteran Member Lifetime Gold Member

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    nope no room to put a metering block in the carbs in the inline configuration ....... i'm thinking of mounting them sideways like i did a few years ago with my old offenhauser side mount linkage . that's why i'm wanting dual feed bowls and secondary metering blocks
     

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